Hello everyone, I'm new here and I'm wondering if Arduino is the way to go. I'm making a box that can continuously loop audio and also adjust the speed of the audio playback. Are there any scripts for adjusting how slow or fast an audio sample is played back? Thanks for helping me be lazy.
Not really the right system for this due to lack of buffer memory. You can get a board that allows you to read SD cards but I don't think it is fast enough for reading audio samples out in real time.
Adafruit's Wave Shield has an SD slot and an audio (mono aural) jack. It reads uncompressed WAV files from the root directory of a FAT16-formatted card, and can stream them to the audio in real time. It only supports 16bit 22050Hz mono WAV files or lower, but it does keep up. There is very little provision for adjusting the playback rate-- if you sped up by 5% I expect it would suffer timing issues.
thanks for the replies... nice MIDI Glockenspiel Mike! I found this interesting drum machine with speed and pitch adjust...SEE the you tube vid at the bottom. Is there a way to rig that with the wav card? little-scale: Arduino Drum Machine
This is what i would like to build, pretty much. I wonder what they used. Buddha Machine 2: All-in-One $25 Ambient Box Gets a Sequel - CDM Create Digital Music
there is a family of voice recorder chips (also mentioned in another thered here some time back) that has the ability to record and playback sound some of them can loop the sound on playback. Some of them has the possibility for being controlled from a microprocessor.