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Learn how to design and build a DIY FM Drum circuit for eurorack synthesizers in this 37-minute tutorial that combines the punchy character of the TR-909 with metallic FM synthesis textures. Follow along as Moritz Klein breaks down the complete circuit design process, covering essential components like triangle VCO, sine waveshaper, VCA, decay envelope, gate-to-trigger conversion, and FM implementation. Discover how to create four different percussion sounds: 909-style kick/tom, metallic bell/gong, ring mod cymbal, and FM cymbal. The video includes a comprehensive bill of materials, circuit simulation link, and detailed explanations of each circuit section from basic oscillators to final output processing. Perfect for synthesizer DIY enthusiasts looking to expand their eurorack system with custom drum modules.
