diff --git a/examples/fft-synth/src/audio.ts b/examples/fft-synth/src/audio.ts
index d0c62c9b30..569f2dd380 100644
--- a/examples/fft-synth/src/audio.ts
+++ b/examples/fft-synth/src/audio.ts
@@ -42,7 +42,7 @@ export const updateAudio = () => {
 	}
 	delay.next(bins);
 	const wave = ifft(conjugate(bins))[0];
-	DB.resetIn(["wave"], <Float64Array>wave);
+	DB.resetIn(["wave"], <Float64Array<ArrayBuffer>>wave);
 
 	if (!actx) return;
 	const left = buf.getChannelData(0);