Add support for velocity command to smnp.audio.synth module

modules/midi/src/main/kotlin/io/smnp/ext/midi/lib/compiler/SequenceCompiler.kt

@@ -59,7 +59,7 @@ abstract class SequenceCompiler {
 
                command["velocity"]?.let {
                   val value = it as? Float ?: throw CustomException("Invalid parameter type: 'velocity' is supposed to be of float type")
-                  velocity = (127.0 * value).toInt()
+                  velocity = (127.0 * value.coerceIn(0.0F, 1.0F)).toInt()
                }
 
                noteOnTick

modules/synth/src/main/kotlin/io/smnp/ext/synth/lib/model/CompilationParameters.kt

@@ -8,6 +8,7 @@ import kotlin.math.pow
 private val SEMITONE = 2.0.pow(1.0 / 12.0)
 
 class CompilationParameters(config: ConfigMap) {
+   val velocity by lazy { (config["velocity"].value as Float).coerceIn(0.0F, 1.0F) }
    val envelope by lazy { EnvelopeFactory.provideEnvelope(config["envelope"]) }
    val overtones by lazy { (config["overtones"].unwrap() as List<Float>).map { it.toDouble() } }
    val bpm by lazy { config["bpm"].value as Int }

modules/synth/src/main/kotlin/io/smnp/ext/synth/lib/wave/WaveCompiler.kt

@@ -13,6 +13,7 @@ import kotlin.math.pow
 class WaveCompiler(config: Value, private val samplingRate: Double) {
    private val schema = ConfigMapSchema()
       .optional("bpm", Matcher.ofType(DataType.INT), Value.int(120))
+      .optional("velocity", Matcher.ofType(DataType.FLOAT), Value.float(1.0F))
       .optional(
          "overtones", Matcher.listOf(DataType.FLOAT), Value.list(
             listOf(
@@ -76,6 +77,6 @@ class WaveCompiler(config: Value, private val samplingRate: Double) {
          Wave.sine(frequency * (overtone + 1), duration, samplingRate) * ratio
       }.toTypedArray())
 
-      return parameters.envelope.apply(wave)
+      return parameters.envelope.apply(wave) * parameters.velocity.toDouble()
    }
 }