The Afterlife compressor is a guitar pedal based on the John Hollis Flatline. It is a simple, low-parts count, optical compressor that adds sustain and compression to your guitar tone. The compression amount is set by a gain stage at the signal input. The dynamic level of the input is processed through IC1B, where the signal is rectified to drive an LED. The LED drives the photocell in parallel with R3, which changes the overall gain of IC1A. This compression evens out the dynamic level of your guitar signal, creating sustain. The release of the compression is determined by the value of C3.

The Afterlife compressor has two controls:
1. VOL: This control adjusts the total output volume of the pedal.
2. SUS: This control adjusts the compression level.

Summary created by AI from the original source.