Electro-Harmonix 690-MainFrame Bit Crusher Guitar Effects Pedal

Step into the nostalgic world of 8-bit gaming and vintage computing with the Mainframe Bit Crusher, a pedal that captures the distinctive lo-fi character of classic arcade machines and early home computers. This powerful effect unit offers comprehensive sample rate reduction from 48kHz down to 110Hz, allowing you to recreate everything from the crisp sounds of modern digital audio to the heavily degraded tones reminiscent of Pac Man and Donkey Kong era gaming systems.

The pedal’s bit crushing capabilities range from pristine 24-bit resolution down to aggressive 1-bit processing, giving you complete control over digital degradation. Just as CDs used 16-bit depth for their audio reproduction, the Mainframe lets you dial in the exact amount of sampling errors and digital artifacts you need. Lower bit depths create those characteristically harsh “old school” tones that defined the Commodore 64 generation of computing.

Beyond basic bit crushing and sample rate reduction, the Mainframe includes a selectable High/Low/Band-Pass filter system for shaping the resulting artifacts. The standout feature is its innovative Sample Rate Tuning Mode, which analyses your playing in real-time and automatically adjusts the sample rate to match your signal’s pitch or a musical interval above it. This means the effect can stay in key with your performance or continuously adapt to create dynamic, pitch-following digital textures.