A homemade guitar pedal that funtions as a Mp3 pedal.
This pedal is usefull to play with backing tracks, it was originaly designed to play backing tracks live, hence the audio LR split. This way, in post the audio metrenome would get faded to the left, while the main backing track would get faded center, so the preformer could hear the track+metrenome through the L channel, while the audiance only heard the backing track through the R channel.