Singular Sound BeatBuddy User Manual page 5

The BeatBuddy is not a traditional effect pedal:
Unlike other effects pedals, the BeatBuddy is not intended to
modify your instrument's sound. It has input jacks only in case
you want to put both the BeatBuddy and your instrument into the
same sound system without the need for a mixer. The beats are
not changed by your instrument's sound. No instrument needs
to be plugged into the BeatBuddy for it to work normally, so the
BeatBuddy can be a stand-alone tool used by any musician.
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