Adding two engines and one processor

src/lib/audio/engines/registry.ts

@@ -14,6 +14,8 @@ import { AdditiveEngine } from './AdditiveEngine';
 import { Snare } from './Snare';
 import { BassDrum } from './BassDrum';
 import { HiHat } from './HiHat';
+import { ParticleNoise } from './ParticleNoise';
+import { DustNoise } from './DustNoise';
 
 export const engines: SynthEngine[] = [
   new Sample(),
@@ -31,4 +33,6 @@ export const engines: SynthEngine[] = [
   new Ring(),
   new KarplusStrong(),
   new AdditiveEngine(),
+  new ParticleNoise(),
+  new DustNoise(),
 ];