21 DIY Kit Sources for Pro Audio, Synth Modules & Instruments — Pro Audio Files
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GB-1 compressor limiter 500 series module — David Evans Audio
Microphone preamplifier with audio compressor
Pira CZ Compressor/Limiter/Clipper for FM broadcasting
Simple Compressor - Limiter
Mini Audio Compressor Schematic
DIY Compressor Limiter 07 - The World of Free Packet Software Amsterdam.
Erica Synths EDU DIY Compressor - SOUND OF YOU STORE ONLINE
A Thing Called Music – Professional Audio Mastering Services in Oxfordshire, UKBuilding My First DIY Audio Compressor - A Thing Called Music - Professional Audio Mastering Services in Oxfordshire, UK
GSSL DIY Kit - Mic & Mod GSSL DIY Kit - Audiofanzine
Designing a simple audio compressor from scratch - YouTube