Normalize oscillator gains across patch library for consistent mix levels

Boosted osc gains on 40 patches that were too quiet to sit well together
under a shared master volume knob.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

patches/World/Dulcimer.json

@@ -2,7 +2,7 @@
   "osc0_waveform": 1,
   "osc0_dutyCycle": 0.500000,
   "osc0_detune": 0.000000,
-  "osc0_gain": 0.650000,
+  "osc0_gain": 4.000000,
   "osc0_active": 1,
   "osc0_octave": 0,
   "osc0_modRouting0": 0,
@@ -14,7 +14,7 @@
   "osc1_waveform": 1,
   "osc1_dutyCycle": 0.500000,
   "osc1_detune": -15.000000,
-  "osc1_gain": 0.200000,
+  "osc1_gain": 3.591475,
   "osc1_active": 1,
   "osc1_octave": 1,
   "osc1_modRouting0": 0,
@@ -26,7 +26,7 @@
   "ampEnv_attack": 0.001000,
   "ampEnv_decay": 0.700000,
   "ampEnv_sustain": 0.050000,
-  "ampEnv_release": 0.150000,
+  "ampEnv_release": 1.000000,
   "modEnv_attack": 0.001000,
   "modEnv_decay": 0.100000,
   "modEnv_sustain": 0.000000,