When playing a music file with playFile(), this will change the tempo, or speed of the playback. The larger the value, the quicker the sound will play back. Smaller values will slow the playback.
speed: int, the tempo. Default is 50.
Corrections, suggestions, and new documentation should be posted to the Forum.
The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.