Forward and reverse delay effects pedal

A device which comprises

• an audio input is written into one main buffer, said input written to the main buffer at a sample rate;
• a modified audio output;
• a switch to change between a forward delay and a reverse delay;
• three sub-buffers within the one main buffer, which comprise:
• one forward sub-buffer which digitally stores audio data for a forward delay effect, the forward sub-buffer having a forward sub-buffer starting location and a forward sub-buffer ending location, a difference between the forward sub-buffer starting location and the forward sub-buffer ending location defining a forward sub-buffer duration;
• one primary reverse circular sub-buffer which digitally stores audio data for a reverse delay effect, the primary reverse sub-buffer having a primary reverse sub-buffer starting location and a primary reverse sub-buffer ending location, a time difference between the primary reverse sub-buffer starting location and the primary reverse sub-buffer ending location defining a primary reverse sub-buffer duration,
• the primary reverse sub-buffer duration being shorter than the forward sub-buffer duration, and
• the primary reverse sub-buffer duration being coextensive with at least a portion of the forward sub-buffer duration;
• one secondary reverse sub-buffer which digitally stores audio data for the reverse delay effect, the one secondary reverse circular sub-buffer having a secondary reverse sub-buffer starting location and a secondary reverse sub-buffer ending location defining a secondary reverse sub-buffer duration,
• the secondary reverse sub-buffer duration being shorter than the forward sub-buffer duration, and
• the secondary reverse sub-buffer duration being coextensive with at least a portion of the forward sub-buffer duration and at least a portion of the primary reverse sub-buffer duration;
• and further wherein
• the duration of each of the primary and secondary reverse sub-buffers are approximately equal and wherein,
• the duration of the forward sub-buffer is approximately equal to the duration of the sum of the duration of the primary and secondary reverse sub-buffers.

A device which transitions from a forward delay effect to a reverse delay effect or vice-versa which comprises:

• a main buffer which captures audio input;
• at least three sub-buffers which store a portion of the audio input, at least one sub-buffer which captures audio input for subsequent output as a forward delay effect and at least two sub-buffers which capture audio input for subsequent output as a reverse delay effect;
• a switch for changing the output from the reverse delay to the forward delay or vice-versa;
• and
• wherein the changing of the output from the forward delay effect to the reverse delay effect occurs essentially instantaneously, and the change from the reverse delay to the forward delay effect occurs at the end of a reverse half-buffer of the at least two sub-buffers.