# Krell: the envelope chooses the next event Each completed envelope samples a new voltage that changes both the next note and its duration. The same envelope opens the voice amplitude. ## 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. GTO left Stepped: cycle off, SMPL up, RATE fast. Left Mix Pro: zero offset, channel 1 low, unused channels zero. 2. GTS upper: short but audible rise, fall around 1–3 seconds; FALL CV attenuverter initially centered. Slowly add a little negative depth for longer higher notes. 3. NTO: low-mid pitch. XFADER: fully toward input 1, manual GAIN closed; raise VC GAIN depth until the GTS envelope makes separate swells. ## Cables 1. GTS XL upper END OUT → GTS XL upper TRIG IN. 2. GTS XL upper END OUT → Dual GTO left Stepped SMPL. 3. Dual GTO S/H source → Dual GTO left Stepped IN. 4. Dual GTO left Stepped OUT → Edelweiss left Mix Pro IN 1. 5. Edelweiss left Mix Pro OUT → NTO 1V/OCT. 6. Edelweiss left Mix Pro OUT → GTS XL upper VC FALL. 7. NTO TRIANGLE → NTO XFADER IN 1. 8. GTS XL upper OUT → NTO XFADER VC GAIN. 9. NTO XFADER OUT → Edelweiss right Mix Pro IN 1. 10. Edelweiss right Mix Pro OUT → Audio Interface AUX IN. ## Listen for Unequal gaps and durations tied to changing pitches. There is no independent master clock and no promise of a tonal scale. ## Play it Change the sign of FALL CV depth to reverse the relationship between pitch and duration. ## If it misbehaves If a note hangs, reduce duration modulation and speed FALL. If the drone never closes, reduce XFADER manual GAIN. ## Module references - https://serge-modular.com/docs/GTS%20XL%20manual.pdf - https://serge-modular.com/docs/Serge%20Dual%20GTO%20user%20manual.pdf