Lower drum_humanize default to 0.15 — tighter feel

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/guide/drums.rst

@@ -27,8 +27,7 @@ Score:
    score = Score("4/4", bpm=120, drum_humanize=0.0)   # perfectly quantized
    score = Score("4/4", bpm=120, drum_humanize=0.1)   # studio tight
 
-The default is 0.3 — subtle enough to feel human, tight enough to
-sound professional.
+The default is 0.15 — just enough to feel alive without sounding loose.
 
 Every drum sound is stereo-panned like a real kit — kick and snare
 center, hi-hat right, crash left, toms spread across the field,

pytheory/rhythm.py

@@ -1776,7 +1776,7 @@ class Score:
     """
 
     def __init__(self, time_signature="4/4", bpm=120, swing: float = 0.0,
-                 drum_humanize: float = 0.3):
+                 drum_humanize: float = 0.15):
         if isinstance(time_signature, str):
             self.time_signature = TimeSignature.from_string(time_signature)
         else: