Keep a variety of 1/8w resistors and small electrolytic capacitors on hand.
Drumbrute mods can be broadly categorized into three types: software, hardware, and DIY. drumbrute mods
Locate the final mix op-amp (usually a TL072 or NJM4580 near the master volume pot). Identify the feedback resistors (R800 and R801, approximately 10k). Solder two 1N4148 diodes in anti-parallel across those resistors. This creates a soft-clipping distortion. For variable distortion, replace the diodes with a 100k dual-gang potentiometer wired as a variable resistance. Keep a variety of 1/8w resistors and small