Homebrew Digital Effects Pedal

Step 4 Code, explanations

The entire purpose of this pedal is to record a short segment of sound and then play it back in a loop continuously, until the foot-switch is pressed again.

This pedal has two recording modes and two playback modes.

Recording:

"Loop" mode

In this mode, a guitarist will hit the foot-switch to begin recording, play a riff, then hit the switch again to stop playback. In this way, a guitarist can define the length of a recording during the recording process, allowing for live/dynamic loop playback.

"Burst" mode

In this mode, the guitarist defines the recording length via a knob. When ready, the foot-switch is pressed to initiate recording, which continues until the time defined by the knob is elapsed. This mode is mostly targeted at extremely short recording lengths, which can make crazy alien or robot sounds.

Playback:

"Bypassed" mode

In bypassed mode, the guitarist can play along with his own recording. When a recording is playing back, the live guitar signal is mixed in with the recorded one, which allows for interesting dynamic playing.

"Kill" mode

In "kill" mode, the signal from the guitar is killed and not mixed into the output, which allows the guitarist to adjust the pitch shift or do whatever else without worrying about their guitar making noise during playback.