more engines

src/lib/audio/engines/registry.ts

@@ -1,5 +1,6 @@
 import type { SynthEngine } from './SynthEngine';
 import { FourOpFM } from './FourOpFM';
+import { TwoOpFM } from './TwoOpFM';
 import { DubSiren } from './DubSiren';
 import { Benjolin } from './Benjolin';
 import { ZzfxEngine } from './ZzfxEngine';
@@ -8,15 +9,18 @@ import { Ring } from './Ring';
 import { Sample } from './Sample';
 import { Input } from './Input';
 import { KarplusStrong } from './KarplusStrong';
+import { AdditiveEngine } from './AdditiveEngine';
 
 export const engines: SynthEngine[] = [
   new Sample(),
   new Input(),
   new FourOpFM(),
+  new TwoOpFM(),
   new DubSiren(),
   new Benjolin(),
   new ZzfxEngine(),
   new NoiseDrum(),
   new Ring(),
   new KarplusStrong(),
+  new AdditiveEngine(),
 ];