Note: This article refers to the BOSS MICRO BR® Digital Recorder that was released in 2006. If you're looking for information on the 2011 MICRO BR® BR-80 Digital Recorder, please click this link:
MICRO BR® BR-80.

The MICRO BR allows WAV or MP3 files to be sped up or slowed down in MP3 TRAINER mode. This is useful if you are practicing a particularly difficult part of a song and would like to slow down the playback to learn. The following steps will guide you through adjusting the playback speed of an audio file in MP3 TRAINER mode.

1. Press the MP3 TRAINER button until "MP3" appears on the bottom left of the screen.
2. Press the left cursor button repetitively.
3. Use the VALUE (+ & -) buttons to select an audio file.
4. Use the CURSOR buttons to select "100%" on the bottom right of the screen.
5. Use the VALUE (+ & -) buttons to change the speed of the audio file.
6. Press the PLAY button to hear the audio file at it's adjusted playback speed.