Application Notes:
MP3 Player Testing With dScope Series III
The dScope Series III is ideally suited to mass production testing of MP3 player audio performance and is in use for this application around the world. There are probably as many ways to test an MP3 player as there are MP3 player manufacturers. There are, however, trends that are almost universal: most MP3 players do not have audio inputs, and instead rely on a computer interface (usually USB) to load the audio.
Most MP3 players are mass production, low margin items, where speed is absolutely critical. This has lots of ramifications for testing: the audio test file must be short, since it must be loaded onto the device in production, and several measurements must be taken quickly - simultaneously if possible.
Audio Multi-tone testing techniques
