fix: add fixed ms instead of percentage

src/modules/audioStreams.ts

@@ -11,7 +11,7 @@ import { PassThrough, Readable } from 'stream';
 
 import prism from 'prism-media';
 
-const DURATION_MARGIN_PCT = 0.25;
+const DURATION_EXTRA_MS = 500;
 
 export class StreamQueue {
 	private queue: Readable[] = [];
@@ -195,7 +195,7 @@ export class MixedStream {
 
 			transcoder.on('end', () => {
 				const durationMs =
-					(totalBytes / 192000) * 1000 * (1 + DURATION_MARGIN_PCT);
+					((totalBytes / 192000) * 1000) + DURATION_EXTRA_MS;
 
 				setTimeout(() => {
 					cleanup();