fix: replace cyclone env~ with vanilla line~ envelope, fix stripnote outlet

- env~ is a cyclone external not available on board's Pd 0.55
- Replace with line~ + *~ 0.0055 for velocity-scaled AR envelope
- Fix stripnote outlet 1 (gate trigger) connected to envelope instead of outlet 0 (pitch)
- Change dac~ to dac~ 1 for mono output matching -outchannels 1
- Envelope: attack ~50ms, release ~50ms, sustain scaled by velocity

scripts/gen_synth_pd.py

@@ -54,7 +54,6 @@ def gen():
     r_pitch = Obj(20, 190, "r midi-pitch")
     strip = Obj(20, 220, "stripnote")
     mtof = Obj(20, 260, "mtof")
-    env = Obj(20, 290, "env~ 50 200 0.7 400")
     osc1 = Obj(140, 260, "osc~")
     mul1 = Obj(140, 290, "*~ 0.3")
     osc2 = Obj(220, 260, "osc~")
@@ -64,7 +63,13 @@ def gen():
     filt = Obj(180, 400, "lop~")
     amp = Obj(180, 460, "*~")
     panscale = Obj(320, 460, "*~")
-    dac = Obj(250, 530, "dac~")
+    dac = Obj(250, 530, "dac~ 1")
+    # ── Vanilla AR envelope (line~, not cyclone env~) ──
+    # stripnote out1 = velocity (0-127) on note-on, 0 on note-off
+    # Scale velocity/127 * 0.7 ≈ velocity * 0.0055 for sustain approx 0.7
+    env_ramp = Obj(20, 290, "line~ 0 50")
+    env_scale = Obj(20, 330, "*~ 0.0055")
+    env_mult = Obj(100, 370, "*~")
 
     connect(c, r_vel, 0, strip, 1)
     connect(c, r_pitch, 0, strip, 0)
@@ -78,9 +83,12 @@ def gen():
     connect(c, sum, 0, scale, 0)
     connect(c, scale, 0, filt, 0)
     connect(c, filt, 0, amp, 0)
-    connect(c, strip, 0, env, 0)
-    connect(c, env, 0, amp, 1)
-    connect(c, amp, 0, panscale, 0)
+    # stripnote out1 (gate: velocity on note-on, 0 on note-off) → line~
+    connect(c, strip, 1, env_ramp, 0)
+    connect(c, env_ramp, 0, env_scale, 0)
+    connect(c, env_scale, 0, env_mult, 0)
+    connect(c, amp, 0, env_mult, 1)
+    connect(c, env_mult, 0, panscale, 0)
 
     # ── Controls (headless-safe: loadbang-initialized floats, not hsl) ──
     lb_cut = Obj(350, 300, "loadbang")
@@ -95,9 +103,8 @@ def gen():
     connect(c, float_vol, 0, div, 0)
     connect(c, div, 0, panscale, 1)
 
-    # ── Output ──
+    # ── Output (mono, matches -outchannels 1) ──
     connect(c, panscale, 0, dac, 0)
-    connect(c, panscale, 0, dac, 1)
 
     # ── Write ──
     lines = [