TT6581 — SID-Inspired Audio Synthesizer1 December 2025·2 minsHardware Fpga Asic Audio Synthesizer Tiny-Tapeout SystemverilogOpen-source audio synthesizer ASIC inspired by the legendary Commodore 64 SID chip. Three voices, ADSR envelopes, state-variable filter, and delta-sigma DAC — all in 2×2 Tiny Tapeout tiles.