# Randomly pitched filter drops A sampled voltage retunes the VCFQ between pings. Pitch changes are independent draws, not a random walk. ## Start here Lower the monitoring level before patching. These are documented patch designs, not claims of hardware audition. Unless this recipe uses the right Mix Pro for control voltage: center its DC offset, zero unused channels, and bring up only the cabled audio inputs. Connect Audio Interface MIX OUT to your normal monitoring chain. 1. GTS upper: 1–2 Hz with fast RISE. GTO left Stepped: cycle off, SMPL up, RATE fast. 2. Left Mix Pro: zero offset and a small positive input gain. VCFQ: audio range, Q high enough to ring, FREQ in the low-mid range. ## Cables 1. GTS XL upper END OUT → GTS XL upper TRIG IN. 2. GTS XL upper END OUT → Dual GTO left Stepped SMPL. 3. GTS XL upper OUT → VCFQ TRIG IN. 4. Dual GTO S/H source → Dual GTO left Stepped IN. 5. Dual GTO left Stepped OUT → Edelweiss left Mix Pro IN 1. 6. Edelweiss left Mix Pro OUT → VCFQ 1V/OCT. 7. VCFQ BAND → Edelweiss right Mix Pro IN 1. 8. Edelweiss right Mix Pro OUT → Audio Interface AUX IN. ## Listen for A stream of plinks with changing resonant pitch. Very long rings can bend when the next pitch sample arrives. ## Play it Reduce the clock speed and increase Q for isolated resonant events. ## If it misbehaves If the pitch range is extreme, reduce the left Mix Pro gain before retuning the filter. ## Module references - https://serge-modular.com/docs/RandomSource_Serge_VCFQ.pdf - https://serge-modular.com/docs/Serge%20Dual%20GTO%20user%20manual.pdf