https://carlmartin.com/red-repeat-2016-edition/
For the new improved Red Repeat 2016 Edition, Carl has added a couple features that various players have asked about. To begin with, we have added a Tap Tempo function. For those familiar with delay pedals, the Tap Tempo allows the player to tap in the tempo he choses to use with his playing. Simply flip the switch that says Manual Time toward the name Red Repeat and with your toe, tap the footswitch marked Tap Tempo to the beat of the song. This allows your echoes to be spaced precisely with the tempo of the song, faster or slower, depending on your style. When The Manual Time switch is flipped away from the Red Repeat 2016 Edition decal, the pedal goes back to setting the space between echoes with the Time knob. The second special feature is the Modulation switch. By engaging this switch, and adjusting the black mini-pots marked Depth and Speed….you can modulate the echoes of your notes so that they mimick the ‘wow and flutter’ of a vintage tape echo! This subtle effect can bring a whole new dimension to your solo’s, especially if you want them to sound ‘old’.