Update index.js

index.js

@@ -325,7 +325,7 @@ return error;
 }
 }
 
-async function ytmp3(url, bitrate = 'lowestaudio') {
+async function ytmp3(url, bitrate = 'highestaudio') {
 try {
 const ID = ytdl.getVideoID(url),
 data = await ytdl.getInfo('https://www.youtube.com/watch?v=' + ID);