With the Electro-Harmonix 22500 Dual Stereo Looper pedal you can record, play back, and overdub two channels of 16-bit uncompressed audio at a 44.1 kHz sampling rate; any loop can be stored in a bank on a removable SDHC card. Both looping channels have reverse and octave functions, undo/redo capability for deleting or restoring your last recorded loop, a quantizing option for syncing your tracks, and LED indicators displaying looping and memory modes. Loops can be created using several configurations in sequential, parallel or free-form modes. Additionally, the 22500 has 16 built-in drum loops.