feat: added pitch bend support

src/test/mocks/tone.ts

@@ -12,6 +12,10 @@ export const MockSampler = vi.fn().mockImplementation(() => ({
   triggerRelease: vi.fn(),
   dispose: vi.fn(),
   loaded: true,
+  attack: 0,
+  release: 0.1,
+  curve: 'exponential',
+  output: {},
   volume: {
     value: -12
   },
@@ -20,6 +24,19 @@ export const MockSampler = vi.fn().mockImplementation(() => ({
   toDestination: vi.fn()
 }));
 
+export const MockBufferSource = vi.fn().mockImplementation((options?: { playbackRate?: number }) => {
+  const instance = {
+    playbackRate: {
+      value: options?.playbackRate ?? 1,
+    },
+    connect: vi.fn(() => instance),
+    start: vi.fn(() => instance),
+    stop: vi.fn(() => instance),
+    onended: undefined as (() => void) | undefined,
+  };
+  return instance;
+});
+
 // Mock Transport object
 export const MockTransport = {
   start: vi.fn(),
@@ -94,6 +111,8 @@ export const MockMeter = vi.fn().mockImplementation(() => ({
 // Complete Tone.js mock
 export const ToneMock = {
   Sampler: MockSampler,
+  BufferSource: MockBufferSource,
+  ToneBufferSource: MockBufferSource,
   Loop: MockLoop,
   Transport: MockTransport,
   Destination: MockDestination,