Fix transcription sample-rate handling (#740)

Fix for #703.

Adds an optional sampleRate parameter to the decodeAudioToFloat32() function. The caption transcriber passes in a value of 16000 to prepare audio in the format Whisper expects.

1 files changed, 3 insertions, 1 deletions

diff --git a/apps/web/src/lib/media/audio.ts b/apps/web/src/lib/media/audio.ts
index 6f789301..e96f158b 100644
--- a/apps/web/src/lib/media/audio.ts
+++ b/apps/web/src/lib/media/audio.ts
@@ -34,10 +34,12 @@ export interface DecodedAudio {
 
 export async function decodeAudioToFloat32({
 	audioBlob,
+	sampleRate,
 }: {
 	audioBlob: Blob;
+	sampleRate?: number;
 }): Promise<DecodedAudio> {
-	const audioContext = createAudioContext();
+	const audioContext = createAudioContext({ sampleRate });
 	const arrayBuffer = await audioBlob.arrayBuffer();
 	const audioBuffer = await audioContext.decodeAudioData(arrayBuffer);