Add project documentation and update .gitignore

Introduces development guidelines for the VST Chip synthesizer, including setup, build, and testing instructions. Adds a placeholder README for the data directory and updates `.gitignore` to include new project-specific build artifacts and paths.

.gitignore

@@ -42,6 +42,10 @@ bin/
 .DS_Store
 
 /web
+/web1
+/web2
 
+/data/*.db*
+**/kotlin-js-store/*
 .kotlin
 .idea

.idea/gradle.xml

@@ -5,7 +5,7 @@
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleHome" value="" />
+        <option name="gradleJvm" value="corretto-21" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />

.junie/guidelines.md

@@ -0,0 +1,105 @@
+# VST Chip Synthesizer Development Guidelines
+
+## Project Overview
+
+VST Chip is a Kotlin multiplatform project that implements a chip-style synthesizer with a web interface. The project consists of:
+
+- JVM backend that serves the web application
+- JS frontend that runs in the browser
+- Audio worklet processor for real-time audio processing
+
+## Build/Configuration Instructions
+
+### Prerequisites
+
+- JDK 11 or higher
+- Gradle 7.x or higher
+- Node.js and npm (for JS development)
+
+### Building the Project
+
+1. **Full Build**:
+   ```bash
+   ./gradlew build
+   ```
+
+2. **JS Build Only**:
+   ```bash
+   ./gradlew buildJS
+   ```
+
+3. **Deployment**:
+   ```bash
+   ./gradlew deploy
+   ```
+   This will build the project, copy web assets, and deploy to the configured server location.
+
+### Configuration
+
+- Server port: 9005 (configured in `Main.kt`)
+- JDBC stats port: 6005
+- Deployment directory: configured in `build.gradle.kts` as `vst-chip.midi-vst.com`
+
+## Testing Information
+
+- **Do not generate tests** for this project. The audio processing code is highly specialized and requires manual testing with audio
+  equipment.
+- Manual testing should be performed using MIDI controllers and audio monitoring tools.
+
+## Development Information
+
+### Project Structure
+
+- **src/commonMain**: Shared code between JS and JVM
+- **src/jsMain**: Browser-specific code
+- **src/jvmMain**: Server-specific code
+- **audio-worklet**: Audio processing code that runs in a separate thread in the browser
+
+### Key Components
+
+1. **JVM Server** (`src/jvmMain/kotlin/nl/astraeus/vst/chip/Main.kt`):
+    - Undertow server that serves the web application
+    - Database initialization
+    - Logging setup
+
+2. **JS Frontend** (`src/jsMain/kotlin/nl/astraeus/vst/chip/Main.kt`):
+    - UI implementation using Komponent library
+    - MIDI handling
+    - WebSocket client for server communication
+
+3. **Audio Processor** (`audio-worklet/src/jsMain/kotlin/nl/astraeus/vst/chip/ChipProcessor.kt`):
+    - Real-time audio synthesis
+    - MIDI message handling
+    - Sound generation with multiple waveforms (sine, square, triangle, sawtooth)
+    - Effects processing (FM, AM, ADSR envelope, delay, feedback)
+
+### Development Workflow
+
+1. Make changes to the code
+2. Run `./gradlew buildJS` to build the JS part
+3. Run the JVM application to test locally
+4. Use `./gradlew deploy` to deploy to the server
+
+### Audio Worklet Development
+
+The audio worklet runs in a separate thread in the browser and handles real-time audio processing. When modifying the audio worklet code:
+
+1. Understand that it runs in a separate context from the main JS code
+2. Communication happens via message passing
+3. Performance is critical - avoid garbage collection and heavy operations in the audio processing loop
+
+### MIDI Implementation
+
+The synthesizer responds to standard MIDI messages:
+
+- Note On/Off (0x90/0x80)
+- Control Change (0xb0) for various parameters
+- Program Change (0xc9) for waveform selection
+
+## Deployment
+
+The project is configured to deploy to a specific server location. The deployment process:
+
+1. Builds the project
+2. Copies web assets
+3. Creates a symbolic link for the latest version

audio-worklet/build.gradle.kts

@@ -31,16 +31,16 @@ kotlin {
             }
 
             distribution {
-                outputDirectory.set(File("$projectDir/../web/"))
+                outputDirectory.set(File("$projectDir/../web2/"))
             }
         }
     }
-    jvm()
 
     sourceSets {
         val commonMain by getting {
             dependencies {
-                implementation("nl.astraeus:vst-worklet-base:1.0.0-SNAPSHOT")
+                implementation("nl.astraeus:vst-worklet-base:1.0.1")
+                implementation("nl.astraeus:midi-arrays:0.3.4")
             }
         }
         val jsMain by getting

audio-worklet/src/commonMain/kotlin/nl/astraeus/vst/midi/MidiMessageHandler.kt

@@ -0,0 +1,82 @@
+package nl.astraeus.vst.midi
+
+typealias MidiHandler = (Byte, Byte, Byte) -> Unit
+
+val Byte.channel: Byte
+  get() {
+    return (this.toInt() and 0x0F).toByte()
+  }
+
+val Byte.command: Byte
+  get() {
+    return ((this.toInt() and 0xF0) shr 4).toByte()
+  }
+
+val Byte.channelCommand: Boolean
+  get() {
+    return this.command >= 8 && this.command <= 13
+  }
+
+class MidiMessageHandler(
+  var channel: Byte = -1
+) {
+  val singleByteHandlers = mutableMapOf<Byte, MidiHandler>()
+  val doubleByteHandlers = mutableMapOf<Byte, MutableMap<Byte, MidiHandler>>()
+
+  fun addHandler(
+    byte1: Byte,
+    byte2: Byte = 0,
+    handler: MidiHandler
+  ) {
+    val b1 = if (byte1.channelCommand) {
+      (byte1.toInt() and 0xF0).toByte()
+    } else {
+      byte1
+    }
+    if (byte2 == 0.toByte()) {
+      singleByteHandlers[b1] = handler
+    } else {
+      val map = doubleByteHandlers.getOrPut(b1) {
+        mutableMapOf()
+      }
+      map[byte2] = handler
+    }
+  }
+
+  fun addHandler(
+    byte1: Int,
+    byte2: Int = 0,
+    handler: MidiHandler
+  ) = addHandler(
+    byte1.toByte(),
+    byte2.toByte(),
+    handler
+  )
+
+  fun handle(
+    byte1: Byte,
+    byte2: Byte,
+    byte3: Byte
+  ) {
+    if (
+      channel < 0 ||
+      !byte1.channelCommand ||
+      (byte1.channelCommand && channel == byte1.channel)
+    ) {
+      val b1 = if (byte1.channelCommand) {
+        (byte1.toInt() and 0xF0).toByte()
+      } else {
+        byte1
+      }
+
+      if (doubleByteHandlers.containsKey(b1)) {
+        doubleByteHandlers[b1]?.get(byte2)?.invoke(byte1, byte2, byte3)
+      } else if (singleByteHandlers.containsKey(b1)) {
+        singleByteHandlers[b1]?.invoke(byte1, byte2, byte3)
+      } else {
+        println("Unhandled message: $byte1 $byte2 $byte3")
+      }
+    }
+  }
+
+}

audio-worklet/src/jsMain/kotlin/nl/astraeus/vst/chip/ChipProcessor.kt

@@ -2,14 +2,16 @@
 
 package nl.astraeus.vst.chip
 
+import nl.astraeus.midi.message.SortedTimedMidiMessageList
+import nl.astraeus.midi.message.TimedMidiMessage
+import nl.astraeus.tba.SlicedByteArray
 import nl.astraeus.vst.ADSR
 import nl.astraeus.vst.AudioWorkletProcessor
 import nl.astraeus.vst.currentTime
+import nl.astraeus.vst.midi.MidiMessageHandler
 import nl.astraeus.vst.registerProcessor
 import nl.astraeus.vst.sampleRate
 import org.khronos.webgl.Float32Array
-import org.khronos.webgl.Int32Array
-import org.khronos.webgl.Uint8Array
 import org.khronos.webgl.get
 import org.khronos.webgl.set
 import org.w3c.dom.MessageEvent
@@ -17,7 +19,7 @@ import kotlin.math.PI
 import kotlin.math.min
 import kotlin.math.sin
 
-val POLYPHONICS = 10
+val POLYPHONICS = 20
 val PI2 = PI * 2
 
 @ExperimentalJsExport
@@ -64,13 +66,14 @@ enum class RecordingState {
 @ExperimentalJsExport
 @JsExport
 class VstChipProcessor : AudioWorkletProcessor() {
-  var midiChannel = 0
+  val midiMessageBuffer = SortedTimedMidiMessageList()
+  val midiMessageHandler = MidiMessageHandler()
   val notes = Array<PlayingNote?>(POLYPHONICS) { null }
 
   var waveform = Waveform.SINE.ordinal
   var volume = 0.75f
   var dutyCycle = 0.5
-  var fmFreq = 0.0
+  var fmFreq = 0.5
   var fmAmp = 0.0
   var amFreq = 0.0
   var amAmp = 0.0
@@ -98,18 +101,94 @@ class VstChipProcessor : AudioWorkletProcessor() {
   init {
     this.port.onmessage = ::handleMessage
     Note.updateSampleRate(sampleRate)
+
+    with(midiMessageHandler) {
+      addHandler(0x90) { b1, b2, b3 ->
+        val note = b2.toInt() and 0xff
+        val velocity = b3.toInt() and 0xff
+
+        if (velocity > 0) {
+          console.log("Note on", note, velocity)
+          noteOn(note, velocity)
+        } else {
+          console.log("Note off", note)
+          noteOff(note)
+        }
+      }
+      addHandler(0x80) { b1, b2, b3 ->
+        val note = b2.toInt() and 0xff
+
+        console.log("Note off", note)
+        noteOff(note)
+      }
+      addHandler(0xc9) { b1, b2, b3 ->
+        waveform = b2.toInt() and 0xff
+      }
+      addHandler(0xb0, 7) { b1, b2, b3 ->
+        volume = b3 / 127f
+      }
+      addHandler(0xb0, 0x47) { b1, b2, b3 ->
+        dutyCycle = b3 / 127.0
+      }
+      addHandler(0xb0, 0x40) { b1, b2, b3 ->
+        fmFreq = b3 / 127.0
+      }
+      addHandler(0xb0, 0x41) { b1, b2, b3 ->
+        fmAmp = b3 / 127.0
+      }
+      addHandler(0xb0, 0x42) { b1, b2, b3 ->
+        amFreq = b3 / 127.0
+      }
+      addHandler(0xb0, 0x43) { b1, b2, b3 ->
+        amAmp = b3 / 127.0
+      }
+      addHandler(0xb0, 0x49) { b1, b2, b3 ->
+        attack = b3 / 127.0
+      }
+      addHandler(0xb0, 0x4b) { b1, b2, b3 ->
+        decay = b3 / 127.0
+      }
+      addHandler(0xb0, 0x46) { b1, b2, b3 ->
+        sustain = b3 / 127.0
+      }
+      addHandler(0xb0, 0x48) { b1, b2, b3 ->
+        release = b3 / 127.0
+      }
+      addHandler(0xb0, 0x4e) { b1, b2, b3 ->
+        delay = b3 / 127.0
+      }
+      addHandler(0xb0, 0x4f) { b1, b2, b3 ->
+        delayDepth = b3 / 127.0
+      }
+      addHandler(0xb0, 0x50) { b1, b2, b3 ->
+        feedback = b3 / 127.0
+      }
+      addHandler(0xb0, 123) { b1, b2, b3 ->
+        for (note in notes) {
+          note?.noteRelease = currentTime
+        }
+      }
+      addHandler(0xe0) { b1, b2, b3 ->
+        if (b2.toInt() and 0xff > 0) {
+          val lsb = b2.toInt() and 0xff
+          val msb = b3.toInt() and 0xff
+
+          amFreq = (((msb - 0x40) + (lsb / 127.0)) / 0x40) * 10.0
+        }
+      }
+    }
   }
 
   private fun handleMessage(message: MessageEvent) {
-    //console.log("VstChipProcessor: Received message:", message.data)
+    //console.log("VstChipProcessor: Received message:", currentTime)
 
     val data = message.data
 
     try {
       when (data) {
         is String -> {
-          when (data) {
+          when {
-            "start_recording" -> {
+            data == "start_recording" -> {
               port.postMessage(recordingBuffer)
               if (recordingState == RecordingState.STOPPED) {
                 recordingState = RecordingState.WAITING_TO_START
@@ -117,34 +196,43 @@ class VstChipProcessor : AudioWorkletProcessor() {
               }
             }
 
-            else ->
+            data.startsWith("set_channel") -> {
-              if (data.startsWith("set_channel")) {
+              val parts = data.split('\n')
-                val parts = data.split('\n')
+              if (parts.size == 2) {
-                if (parts.size == 2) {
+                midiMessageHandler.channel = parts[1].toByte()
-                  midiChannel = parts[1].toInt()
+
-                  println("Setting channel: $midiChannel")
+                println("Setting channel: ${midiMessageHandler.channel}")
-                }
-              } else if (data.startsWith("waveform")) {
-                val parts = data.split('\n')
-                if (parts.size == 2) {
-                  waveform = parts[1].toInt()
-                  println("Setting waveform: $waveform")
-                }
               }
+            }
+
+            data.startsWith("waveform") -> {
+              val parts = data.split('\n')
+              if (parts.size == 2) {
+                waveform = parts[1].toInt()
+                println("Setting waveform: $waveform")
+              }
+            }
           }
         }
 
-        is Uint8Array -> {
+        is ByteArray -> {
-          val data32 = Int32Array(data.length)
+          val message1 = TimedMidiMessage(data)
-          for (i in 0 until data.length) {
+          midiMessageBuffer.add(message1)
-            data32[i] = (data[i].toInt() and 0xff)
+          playBuffer()
-          }
-          playMidi(data32)
         }
+        /*
+                is Uint8Array -> {
+                  val data32 = Int32Array(data.length)
+                  for (i in 0 until data.length) {
+                    data32[i] = (data[i].toInt() and 0xff)
+                  }
+                  playMidi(data32)
+                }
 
-        is Int32Array -> {
+                is Int32Array -> {
-          playMidi(data)
+                  playMidi(data)
-        }
+                }
+        */
 
         else ->
           console.error("Don't kow how to handle message", message)
@@ -154,135 +242,30 @@ class VstChipProcessor : AudioWorkletProcessor() {
     }
   }
 
-  private fun playMidi(bytes: Int32Array) {
+  private fun playBuffer() {
-    console.log("playMidi", bytes)
+    while (
-    if (bytes.length > 0) {
+      midiMessageBuffer.isNotEmpty() &&
-      var cmdByte = bytes[0]
+      (midiMessageBuffer.nextTimestamp() ?: 0.0) < currentTime
-      val channelCmd = ((cmdByte shr 4) and 0xf) != 0xf0
+    ) {
-      val channel = cmdByte and 0xf
+      val midi = midiMessageBuffer.read()
-      println("Channel cmd: $channelCmd")
+      playMidi(midi.midi)
-      if (channelCmd && channel != midiChannel) {
-        console.log("Wrong channel", midiChannel, bytes)
-        return
-      }
-
-      cmdByte = cmdByte and 0xf0
-
-      //console.log("Received", bytes)
-      when (cmdByte) {
-        0x90 -> {
-          if (bytes.length == 3) {
-            val note = bytes[1]
-            val velocity = bytes[2]
-
-            if (velocity > 0) {
-              noteOn(note, velocity)
-            } else {
-              noteOff(note)
-            }
-          }
-        }
-
-        0x80 -> {
-          if (bytes.length >= 2) {
-            val note = bytes[1]
-
-            noteOff(note)
-          }
-        }
-
-        0xc9 -> {
-          if (bytes.length >= 1) {
-            val waveform = bytes[1]
-
-            if (waveform < 4) {
-              this.waveform = waveform
-            }
-          }
-        }
-
-        0xb0 -> {
-          if (bytes.length == 3) {
-            val knob = bytes[1]
-            val value = bytes[2]
-
-            when (knob) {
-              7 -> {
-                volume = value / 127f
-              }
-
-              0x47 -> {
-                dutyCycle = value / 127.0
-              }
-
-              0x40 -> {
-                fmFreq = value / 127.0
-              }
-
-              0x41 -> {
-                fmAmp = value / 127.0
-              }
-
-              0x42 -> {
-                amFreq = value / 127.0
-              }
-
-              0x43 -> {
-                amAmp = value / 127.0
-              }
-
-              0x49 -> {
-                attack = value / 127.0
-              }
-
-              0x4b -> {
-                decay = value / 127.0
-              }
-
-              0x46 -> {
-                sustain = value / 127.0
-              }
-
-              0x48 -> {
-                release = value / 127.0
-              }
-
-              0x4e -> {
-                delay = value / 127.0
-                println("Setting delay $delay")
-              }
-
-              0x4f -> {
-                delayDepth = value / 127.0
-                println("Setting delayDepth $delayDepth")
-              }
-
-              0x50 -> {
-                feedback = value / 127.0
-                println("Setting feedback $delayDepth")
-              }
-
-              123 -> {
-                for (note in notes) {
-                  note?.noteRelease = currentTime
-                }
-              }
-            }
-          }
-        }
-
-        0xe0 -> {
-          if (bytes.length == 3) {
-            val lsb = bytes[1]
-            val msb = bytes[2]
-
-            amFreq = (((msb - 0x40) + (lsb / 127.0)) / 0x40) * 10.0
-          }
-        }
-      }
     }
   }
 
+  private fun playMidi(bytes: SlicedByteArray) {
+    var index = 0
+
+    while (index < bytes.size && bytes[index].toUByte() > 0u) {
+      val buffer = bytes.getBlob(index, 3)
+      playMidiFromBuffer(buffer)
+      index += 3
+    }
+  }
+
+  private fun playMidiFromBuffer(bytes: SlicedByteArray) {
+    midiMessageHandler.handle(bytes[0], bytes[1], bytes[2])
+  }
+
   private fun noteOn(note: Int, velocity: Int) {
     for (i in 0 until POLYPHONICS) {
       if (notes[i]?.note == note) {
@@ -332,13 +315,15 @@ class VstChipProcessor : AudioWorkletProcessor() {
       recordingStart = 0
     }
 
+    playBuffer()
+
     for ((index, note) in notes.withIndex()) {
       if (note != null) {
         val midiNote = Note.fromMidi(note.note)
         val sampleDelta = midiNote.sampleDelta
 
         for (i in 0 until samples) {
-          var targetVolume = note.velocity / 127f * 10f
+          var targetVolume = note.velocity / 127f * 1f
           targetVolume *= ADSR.calculate(
             attack,
             decay,
@@ -355,8 +340,10 @@ class VstChipProcessor : AudioWorkletProcessor() {
           }
 
           var cycleOffset = note.cycleOffset
+          val fmMult = sin(currentTime * fmFreq * midiNote.freq * 2f * PI2) * fmAmp
           val fmModulation =
-            sampleDelta + (sin(fmFreq * 1000f * PI2 * (note.sample / sampleRate.toDouble())).toFloat() * (100f * fmAmp * sampleDelta))
+            sampleDelta * fmMult //+ (sin(fmFreq * 1000f * PI2 * (note.sample / sampleRate.toDouble())).toFloat() * (100f * fmAmp * sampleDelta))
+
           val amModulation =
             1f + (sin(sampleLength * amFreq * 1000f * PI2 * note.sample) * amAmp).toFloat()
 
@@ -401,7 +388,6 @@ class VstChipProcessor : AudioWorkletProcessor() {
           left[i] = left[i] + waveValue * note.actualVolume * volume * amModulation
           right[i] = right[i] + waveValue * note.actualVolume * volume * amModulation
 
-
           // comb filter delay
           val delaySampleIndex =
             (note.sample + note.combDelayBuffer.length) % note.combDelayBuffer.length
@@ -428,10 +414,13 @@ class VstChipProcessor : AudioWorkletProcessor() {
     }
 
     // if sin enable
+
+    /*
     for (i in 0 until samples) {
       left[i] = sin(left[i] * PI2).toFloat()
       right[i] = sin(right[i] * PI2).toFloat()
     }
+    */
 
     val delaySamples = (delay * leftDelayBuffer.length).toInt()
     for (i in 0 until samples) {
@@ -466,5 +455,5 @@ class VstChipProcessor : AudioWorkletProcessor() {
 fun main() {
   registerProcessor("vst-chip-processor", VstChipProcessor::class.js)
 
-  println("VstChipProcessor registered!")
+  console.log("'vst-chip-processor' registered!", currentTime)
 }

audio-worklet/src/jsMain/kotlin/nl/astraeus/vst/chip/Note.kt

@@ -12,8 +12,6 @@ import kotlin.math.round
  * Time: 11:50
  */
 
-@ExperimentalJsExport
-@JsExport
 enum class Note(
   val sharp: String,
   val flat: String

build.gradle.kts

@@ -25,10 +25,11 @@ kotlin {
       commonWebpackConfig {
         outputFileName = "vst-chip-worklet-ui.js"
         sourceMaps = true
+        devtool = "inline-source-map"
       }
 
       distribution {
-        outputDirectory.set(File("$projectDir/web/"))
+        outputDirectory.set(File("$projectDir/web1/"))
       }
     }
   }
@@ -55,43 +56,17 @@ kotlin {
   sourceSets {
     val commonMain by getting {
       dependencies {
-        //base
+        api("nl.astraeus:vst-ui-base:2.0.0")
-        implementation("nl.astraeus:kotlin-css-generator:1.0.10")
+        implementation("nl.astraeus:midi-arrays:0.3.4")
-        implementation("org.jetbrains.kotlinx:kotlinx-datetime:0.6.0")
-        implementation("nl.astraeus:vst-ui-base:1.1.2")
-      }
-    }
-    val jsMain by getting {
-      dependencies {
-        implementation("nl.astraeus:kotlin-komponent:1.2.4")
       }
     }
+    val jsMain by getting
     val jsTest by getting {
       dependencies {
         implementation(kotlin("test-js"))
       }
     }
-    /*        val wasmJsMain by getting {
+    val jvmMain by getting
-                dependencies {
-                    implementation("nl.astraeus:kotlin-komponent:1.2.4-SNAPSHOT")
-                    implementation("nl.astraeus:vst-ui-base:1.0.1-SNAPSHOT")
-                }
-            }*/
-    val jvmMain by getting {
-      dependencies {
-        //base
-
-        implementation("io.undertow:undertow-core:2.3.14.Final")
-        implementation("io.undertow:undertow-websockets-jsr:2.3.14.Final")
-        implementation("org.jboss.xnio:xnio-nio:3.8.16.Final")
-
-        implementation("org.xerial:sqlite-jdbc:3.46.0.0")
-        implementation("com.zaxxer:HikariCP:4.0.3")
-        implementation("nl.astraeus:simple-jdbc-stats:1.6.1")
-
-        implementation("org.jetbrains.kotlinx:kotlinx-html-jvm:0.11.0")
-      }
-    }
   }
 }
 
@@ -99,6 +74,18 @@ application {
   mainClass.set("nl.astraeus.vst.chip.MainKt")
 }
 
+tasks.register<Copy>("buildJS") {
+  duplicatesStrategy = DuplicatesStrategy.INCLUDE
+  dependsOn("audio-worklet:jsBrowserDevelopmentExecutableDistribution")
+  dependsOn("jsBrowserDevelopmentExecutableDistribution")
+
+  from(layout.projectDirectory.dir("web1"))
+  into(layout.projectDirectory.dir("web"))
+
+  from(layout.projectDirectory.dir("web2"))
+  into(layout.projectDirectory.dir("web"))
+}
+
 /* Hardcoded deploy configuration */
 
 val deployDirectory = "vst-chip.midi-vst.com"

common.gradle.kts

@@ -3,10 +3,13 @@ version = "0.1.0"
 
 allprojects {
   repositories {
-    mavenLocal()
+    maven {
-    mavenCentral()
+      url = uri("https://gitea.astraeus.nl/api/packages/rnentjes/maven")
+    }
     maven {
       url = uri("https://gitea.astraeus.nl:8443/api/packages/rnentjes/maven")
     }
+    mavenCentral()
+    mavenLocal()
   }
 }

data/readme.md

@@ -0,0 +1 @@
+Data directory for the db

settings.common.gradle.kts

@@ -1,6 +1,6 @@
 pluginManagement {
   plugins {
-    kotlin("multiplatform") version "2.0.21"
+    kotlin("multiplatform") version "2.1.20"
   }
   repositories {
     gradlePluginPortal()

src/jsMain/kotlin/nl/astraeus/vst/chip/Main.kt

@@ -9,12 +9,20 @@ import nl.astraeus.vst.chip.view.MainView
 import nl.astraeus.vst.chip.ws.WebsocketClient
 import nl.astraeus.vst.ui.css.CssSettings
 
-fun main() {
+object Views {
-  CssSettings.shortId = false
+  val mainView by lazy {
-  CssSettings.preFix = "vst-chip"
+    MainView()
+  }
 
+  init {
+    CssSettings.shortId = false
+    CssSettings.preFix = "vst"
+  }
+}
+
+fun main() {
   Komponent.unsafeMode = UnsafeMode.UNSAFE_SVG_ONLY
-  Komponent.create(document.body!!, MainView)
+  Komponent.create(document.body!!, Views.mainView)
 
   Midi.start()
 

src/jsMain/kotlin/nl/astraeus/vst/chip/audio/AudioContextHandler.kt

@@ -1,10 +1,5 @@
 package nl.astraeus.vst.chip.audio
 
-import nl.astraeus.vst.chip.AudioContext
-
 object AudioContextHandler {
-  val audioContext: dynamic = AudioContext()
+  val audioContext: dynamic = js("new AudioContext()")
-
+}
-
-
-}

src/jsMain/kotlin/nl/astraeus/vst/chip/audio/AudioModule.kt

@@ -1,5 +1,6 @@
 package nl.astraeus.vst.chip.audio
 
+import nl.astraeus.midi.message.TimedMidiMessage
 import nl.astraeus.vst.chip.AudioWorkletNode
 import nl.astraeus.vst.chip.AudioWorkletNodeParameters
 import nl.astraeus.vst.chip.audio.AudioContextHandler.audioContext
@@ -53,11 +54,27 @@ abstract class AudioNode(
 
   abstract fun onMessage(message: MessageEvent)
 
+  open fun postMessage(vararg data: Int) {
+    if (port == null) {
+      console.log("postMessage port is NULL!")
+    }
+
+    val array = ByteArray(data.size) { data[it].toByte() }
+
+    port?.postMessage(
+      TimedMidiMessage(
+        audioContext.currentTime,
+        *array
+      ).data.buffer.toByteArray()
+    )
+  }
+
   open fun postMessage(msg: Any) {
     if (port == null) {
       console.log("postMessage port is NULL!")
     }
     port?.postMessage(msg)
+    //console.log("Posted message", audioContext.currentTime)
   }
 
   // call from user gesture
@@ -83,6 +100,7 @@ abstract class AudioNode(
       port = node.port as? MessagePort
 
       created = true
+      console.log("Created node: ${audioContext.currentTime}")
 
       done(node)
     }

src/jsMain/kotlin/nl/astraeus/vst/chip/audio/VstChipWorklet.kt

@@ -2,15 +2,12 @@
 
 package nl.astraeus.vst.chip.audio
 
+import nl.astraeus.midi.message.TimedMidiMessage
 import nl.astraeus.vst.chip.PatchDTO
-import nl.astraeus.vst.chip.view.MainView
+import nl.astraeus.vst.chip.Views
 import nl.astraeus.vst.chip.view.WaveformView
-import nl.astraeus.vst.ui.util.uInt8ArrayOf
 import org.khronos.webgl.Float32Array
-import org.khronos.webgl.Uint8Array
-import org.khronos.webgl.get
 import org.w3c.dom.MessageEvent
-import kotlin.experimental.and
 
 object VstChipWorklet : AudioNode(
   "/vst-chip-worklet.js",
@@ -33,63 +30,63 @@ object VstChipWorklet : AudioNode(
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 7, (value * 127).toInt())
+        0xb0 + midiChannel, 7, (value * 127).toInt()
       )
     }
   var dutyCycle = 0.5
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x47, (value * 127).toInt())
+        0xb0 + midiChannel, 0x47, (value * 127).toInt()
       )
     }
-  var fmModFreq = 0.0
+  var fmModFreq = 1.0
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x40, (value * 127).toInt())
+        0xb0 + midiChannel, 0x40, (value * 127).toInt()
       )
     }
   var fmModAmp = 0.0
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x41, (value * 127).toInt())
+        0xb0 + midiChannel, 0x41, (value * 127).toInt()
       )
     }
   var amModFreq = 0.0
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x42, (value * 127).toInt())
+        0xb0 + midiChannel, 0x42, (value * 127).toInt()
       )
     }
   var amModAmp = 0.0
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x43, (value * 127).toInt())
+        0xb0 + midiChannel, 0x43, (value * 127).toInt()
       )
     }
   var feedback = 0.0
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x50, (value * 127).toInt())
+        0xb0 + midiChannel, 0x50, (value * 127).toInt()
       )
     }
   var delay = 0.0
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x4e, (value * 127).toInt())
+        0xb0 + midiChannel, 0x4e, (value * 127).toInt()
       )
     }
   var delayDepth = 0.0
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x4f, (value * 127).toInt())
+        0xb0 + midiChannel, 0x4f, (value * 127).toInt()
       )
     }
 
@@ -97,28 +94,28 @@ object VstChipWorklet : AudioNode(
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x49, (value * 127).toInt())
+        0xb0 + midiChannel, 0x49, (value * 127).toInt()
       )
     }
   var decay = 0.2
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x4b, (value * 127).toInt())
+        0xb0 + midiChannel, 0x4b, (value * 127).toInt()
       )
     }
   var sustain = 0.5
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x46, (value * 127).toInt())
+        0xb0 + midiChannel, 0x46, (value * 127).toInt()
       )
     }
   var release = 0.2
     set(value) {
       field = value
       super.postMessage(
-        uInt8ArrayOf(0xb0 + midiChannel, 0x48, (value * 127).toInt())
+        0xb0 + midiChannel, 0x48, (value * 127).toInt()
       )
     }
 
@@ -139,54 +136,64 @@ object VstChipWorklet : AudioNode(
   }
 
   override fun postMessage(msg: Any) {
-    if (msg is Uint8Array) {
+    if (msg is ByteArray) {
-      if (
+      val tmm = TimedMidiMessage(msg)
-        msg.length == 3
+      val byte1 = tmm.midi[0]
-        && (msg[0] and 0xf == midiChannel.toByte())
-        && (msg[0] and 0xf0.toByte() == 0xb0.toByte())
-      ) {
-        val knob = msg[1]
-        val value = msg[2]
 
-        handleIncomingMidi(knob, value)
+      if (byte1.toInt() and 0xf0 == 0xb0) {
-      } else {
+        handleIncomingMidi(tmm.midi[1], tmm.midi[2])
-        super.postMessage(msg)
       }
-    } else {
-      super.postMessage(msg)
     }
+    super.postMessage(msg)
+  }
+
+  override fun postMessage(vararg msg: Int) {
+    println("postMessage ${msg.size} bytes")
+    if (
+      msg.size == 3
+      && (msg[0] and 0xf == midiChannel)
+      && (msg[0] and 0xf0 == 0xb0)
+    ) {
+      val knob = msg[1]
+      val value = msg[2]
+
+      handleIncomingMidi(knob.toByte(), value.toByte())
+    }
+
+    super.postMessage(msg)
   }
 
   private fun handleIncomingMidi(knob: Byte, value: Byte) {
+    println("Incoming knob: $knob, value: $value")
     when (knob) {
       0x46.toByte() -> {
         volume = value / 127.0
-        MainView.requestUpdate()
+        Views.mainView.requestUpdate()
       }
 
       0x4a.toByte() -> {
         dutyCycle = value / 127.0
-        MainView.requestUpdate()
+        Views.mainView.requestUpdate()
       }
 
       0x40.toByte() -> {
         fmModFreq = value / 127.0
-        MainView.requestUpdate()
+        Views.mainView.requestUpdate()
       }
 
       0x41.toByte() -> {
         fmModAmp = value / 127.0
-        MainView.requestUpdate()
+        Views.mainView.requestUpdate()
       }
 
       0x42.toByte() -> {
         amModFreq = value / 127.0
-        MainView.requestUpdate()
+        Views.mainView.requestUpdate()
       }
 
       0x43.toByte() -> {
         amModAmp = value / 127.0
-        MainView.requestUpdate()
+        Views.mainView.requestUpdate()
       }
     }
   }

src/jsMain/kotlin/nl/astraeus/vst/chip/midi/Midi.kt

@@ -1,8 +1,10 @@
 package nl.astraeus.vst.chip.midi
 
 import kotlinx.browser.window
+import nl.astraeus.midi.message.TimedMidiMessage
+import nl.astraeus.vst.chip.Views
+import nl.astraeus.vst.chip.audio.AudioContextHandler
 import nl.astraeus.vst.chip.audio.VstChipWorklet
-import nl.astraeus.vst.chip.view.MainView
 import org.khronos.webgl.Uint8Array
 import org.khronos.webgl.get
 
@@ -66,7 +68,7 @@ object Midi {
           outputs.add(output)
         }
 
-        MainView.requestUpdate()
+        Views.mainView.requestUpdate()
       },
       { e ->
         println("Failed to get MIDI access - $e")
@@ -124,9 +126,14 @@ object Midi {
         hex.append(data[index].toString(16))
         hex.append(" ")
       }
-      console.log("Midi message:", hex)
+      console.log("Midi message:", hex, message)
+      val midiData = ByteArray(message.data.length) { data[it].toByte() }
+      val timeMessage = TimedMidiMessage(
+        AudioContextHandler.audioContext.currentTime,
+        *midiData
+      )
       VstChipWorklet.postMessage(
-        message.data
+        timeMessage.data.buffer.toByteArray()
       )
     }
 

src/jsMain/kotlin/nl/astraeus/vst/chip/view/MainView.kt

@@ -35,6 +35,9 @@ import nl.astraeus.css.style.cls
 import nl.astraeus.komp.HtmlBuilder
 import nl.astraeus.komp.Komponent
 import nl.astraeus.komp.currentElement
+import nl.astraeus.midi.message.TimedMidiMessage
+import nl.astraeus.midi.message.getCurrentTime
+import nl.astraeus.vst.chip.Views
 import nl.astraeus.vst.chip.audio.VstChipWorklet
 import nl.astraeus.vst.chip.audio.VstChipWorklet.midiChannel
 import nl.astraeus.vst.chip.midi.Midi
@@ -46,7 +49,6 @@ import nl.astraeus.vst.ui.css.Css.defineCss
 import nl.astraeus.vst.ui.css.Css.noTextSelect
 import nl.astraeus.vst.ui.css.CssName
 import nl.astraeus.vst.ui.css.hover
-import nl.astraeus.vst.ui.util.uInt8ArrayOf
 import org.khronos.webgl.get
 import org.w3c.dom.CanvasRenderingContext2D
 import org.w3c.dom.HTMLCanvasElement
@@ -60,7 +62,7 @@ object WaveformView: Komponent() {
   }
 
   fun onAnimationFrame(time: Double) {
-    if (MainView.started) {
+    if (Views.mainView.started) {
       VstChipWorklet.postMessage("start_recording")
     }
 
@@ -95,10 +97,9 @@ object WaveformView: Komponent() {
       }
     }
   }
-
 }
 
-object MainView : Komponent(), CssName {
+class MainView : Komponent() {
   private var messages: MutableList<String> = ArrayList()
   var started = false
 
@@ -114,6 +115,11 @@ object MainView : Komponent(), CssName {
     requestUpdate()
   }
 
+  override fun renderUpdate() {
+    println("Rendering MainView")
+    super.renderUpdate()
+  }
+
   override fun HtmlBuilder.render() {
     div(MainDivCss.name) {
       if (!started) {
@@ -190,7 +196,8 @@ object MainView : Komponent(), CssName {
           +"STOP"
           onClickFunction = {
             VstChipWorklet.postDirectlyToWorklet(
-              uInt8ArrayOf(0xb0 + midiChannel, 123, 0)
+              TimedMidiMessage(getCurrentTime(), (0xb0 + midiChannel).toByte(), 123, 0)
+                .data.buffer.data
             )
           }
         }
@@ -242,7 +249,7 @@ object MainView : Komponent(), CssName {
           ExpKnobComponent(
             value = VstChipWorklet.volume,
             label = "Volume",
-            minValue = 0.005,
+            minValue = 0.0,
             maxValue = 1.0,
             step = 5.0 / 127.0,
             width = 100,
@@ -268,8 +275,8 @@ object MainView : Komponent(), CssName {
           ExpKnobComponent(
             value = VstChipWorklet.fmModFreq,
             label = "FM Freq",
-            minValue = 0.005,
+            minValue = 0.0,
-            maxValue = 1.0,
+            maxValue = 2.0,
             step = 5.0 / 127.0,
             width = 100,
             height = 120,
@@ -281,7 +288,7 @@ object MainView : Komponent(), CssName {
           ExpKnobComponent(
             value = VstChipWorklet.fmModAmp,
             label = "FM Ampl",
-            minValue = 0.005,
+            minValue = 0.0,
             maxValue = 1.0,
             step = 5.0 / 127.0,
             width = 100,
@@ -294,7 +301,7 @@ object MainView : Komponent(), CssName {
           ExpKnobComponent(
             value = VstChipWorklet.amModFreq,
             label = "AM Freq",
-            minValue = 0.005,
+            minValue = 0.0,
             maxValue = 1.0,
             step = 5.0 / 127.0,
             width = 100,
@@ -307,7 +314,7 @@ object MainView : Komponent(), CssName {
           ExpKnobComponent(
             value = VstChipWorklet.amModAmp,
             label = "AM Ampl",
-            minValue = 0.005,
+            minValue = 0.0,
             maxValue = 1.0,
             step = 5.0 / 127.0,
             width = 100,
@@ -320,7 +327,7 @@ object MainView : Komponent(), CssName {
           ExpKnobComponent(
             value = VstChipWorklet.feedback,
             label = "Feedback",
-            minValue = 0.005,
+            minValue = 0.0,
             maxValue = 1.0,
             step = 5.0 / 127.0,
             width = 100,
@@ -333,7 +340,7 @@ object MainView : Komponent(), CssName {
           ExpKnobComponent(
             value = VstChipWorklet.delay,
             label = "Delay",
-            minValue = 0.005,
+            minValue = 0.0,
             maxValue = 1.0,
             step = 5.0 / 127.0,
             width = 100,
@@ -346,7 +353,7 @@ object MainView : Komponent(), CssName {
           ExpKnobComponent(
             value = VstChipWorklet.delayDepth,
             label = "Delay depth",
-            minValue = 0.005,
+            minValue = 0.0,
             maxValue = 1.0,
             step = 5.0 / 127.0,
             width = 100,
@@ -361,26 +368,26 @@ object MainView : Komponent(), CssName {
           ExpKnobComponent(
             value = VstChipWorklet.attack,
             label = "Attack",
-            minValue = 0.005,
+            minValue = 0.0,
-            maxValue = 1.0,
+            maxValue = 5.0,
-            step = 5.0 / 127.0,
+            step = 25.0 / 127.0,
             width = 100,
             height = 120,
           ) { value ->
-            VstChipWorklet.attack = value
+            VstChipWorklet.attack = value / 5.0
           }
         )
         include(
           ExpKnobComponent(
             value = VstChipWorklet.decay,
             label = "Decay",
-            minValue = 0.005,
+            minValue = 0.0,
-            maxValue = 1.0,
+            maxValue = 5.0,
-            step = 5.0 / 127.0,
+            step = 25.0 / 127.0,
             width = 100,
             height = 120,
           ) { value ->
-            VstChipWorklet.decay = value
+            VstChipWorklet.decay = value / 5.0
           }
         )
         include(
@@ -400,13 +407,13 @@ object MainView : Komponent(), CssName {
           ExpKnobComponent(
             value = VstChipWorklet.release,
             label = "Release",
-            minValue = 0.005,
+            minValue = 0.0,
-            maxValue = 1.0,
+            maxValue = 5.0,
-            step = 5.0 / 127.0,
+            step = 25.0 / 127.0,
             width = 100,
             height = 120,
           ) { value ->
-            VstChipWorklet.release = value
+            VstChipWorklet.release = value / 5.0
           }
         )
       }
@@ -414,18 +421,19 @@ object MainView : Komponent(), CssName {
     }
   }
 
-  object MainDivCss : CssName
+  companion object MainViewCss : CssName() {
-  object ActiveCss : CssName
+    object MainDivCss : CssName()
-  object ButtonCss : CssName
+    object ActiveCss : CssName()
-  object ButtonBarCss : CssName
+    object ButtonCss : CssName()
-  object SelectedCss : CssName
+    object ButtonBarCss : CssName()
-  object NoteBarCss : CssName
+    object SelectedCss : CssName()
-  object StartSplashCss : CssName
+    object NoteBarCss : CssName()
-  object StartBoxCss : CssName
+    object StartSplashCss : CssName()
-  object StartButtonCss : CssName
+    object StartBoxCss : CssName()
-  object ControlsCss : CssName
+    object StartButtonCss : CssName()
+    object ControlsCss : CssName()
 
-  private fun css() {
+    private fun css() {
       defineCss {
         select("*") {
           select("*:before") {
@@ -524,23 +532,23 @@ object MainView : Komponent(), CssName {
           backgroundColor(Css.currentStyle.mainBackgroundColor)
         }
       }
-  }
-
-  private fun Style.commonButton() {
-    display(Display.inlineBlock)
-    padding(1.rem)
-    backgroundColor(Css.currentStyle.buttonBackgroundColor)
-    borderColor(Css.currentStyle.buttonBorderColor)
-    borderWidth(Css.currentStyle.buttonBorderWidth)
-    color(Css.currentStyle.mainFontColor)
-
-    hover {
-      backgroundColor(Css.currentStyle.buttonBackgroundColor.hover())
     }
-    and(SelectedCss.cls()) {
+
-      backgroundColor(Css.currentStyle.buttonBackgroundColor.hover().hover().hover())
+    private fun Style.commonButton() {
+      display(Display.inlineBlock)
+      padding(1.rem)
+      backgroundColor(Css.currentStyle.buttonBackgroundColor)
+      borderColor(Css.currentStyle.buttonBorderColor)
+      borderWidth(Css.currentStyle.buttonBorderWidth)
+      color(Css.currentStyle.mainFontColor)
+
+      hover {
+        backgroundColor(Css.currentStyle.buttonBackgroundColor.hover())
+      }
+      and(SelectedCss.cls()) {
+        backgroundColor(Css.currentStyle.buttonBackgroundColor.hover().hover().hover())
+      }
     }
   }
 
-
 }

src/jsMain/kotlin/nl/astraeus/vst/chip/ws/WebsocketClient.kt

@@ -4,9 +4,9 @@ package nl.astraeus.vst.chip.ws
 
 import kotlinx.browser.window
 import nl.astraeus.vst.chip.PatchDTO
+import nl.astraeus.vst.chip.Views
 import nl.astraeus.vst.chip.audio.VstChipWorklet
 import nl.astraeus.vst.chip.midi.Midi
-import nl.astraeus.vst.chip.view.MainView
 import org.w3c.dom.MessageEvent
 import org.w3c.dom.WebSocket
 import org.w3c.dom.events.Event
@@ -90,7 +90,7 @@ object WebsocketClient {
 
           Midi.setInput(patch.midiId, patch.midiName)
           VstChipWorklet.load(patch)
-          MainView.requestUpdate()
+          Views.mainView.requestUpdate()
         }
       }
     }