v1.2.6

[1.2.6]

Added

• The diagnostic report now ends with a "Confidence Warnings" section
  listing the bars where the experimental classifiers are least sure of
  themselves -- combining low-confidence melody/accompaniment calls with
  any hand-span violations from --hand-assignment into one "here's
  where I might be wrong" view, worst first. No switch to turn on --
  it's pure diagnostics, always shown when there's something worth
  flagging, and can't change engraving output.

Fixed

• hand_warnings could be referenced before assignment when
  --hand-assignment was off, a latent bug from when that feature was
  added -- caught while wiring up the confidence-warnings section above,
  no observable effect before now since nothing read it in that path.
• --split-window-bars 0 (or negative) crashed with a raw
  ZeroDivisionError instead of a clear error message. Negative
  --max-hand-span/--hand-ambiguity-zone were silently accepted
  instead of rejected. All three now validate up front with a proper
  error message; found via stress-testing the new experimental features
  against invalid/boundary inputs before shipping them.
• The duration optimizer was undercounting how many tied noteheads a note
  crossing a barline would actually need, for any tie-temperature above
  0.0. It assumed a barline split always costs exactly one extra
  notehead, but a split forces the pre-barline segment to whatever's
  left until the barline -- which is often not a clean note value even
  when the note's full duration would have been, and that remainder can
  need extra noteheads of its own. In practice this meant some candidate
  durations looked cheaper than they really were, so the optimizer
  occasionally chose more cross-bar-tied notation than your
  tie-temperature setting actually called for. Fixed by having it
  properly split the note at each barline and count each resulting
  piece on its own. Net effect on a real test piece: noticeably fewer
  cross-bar ties at the same tie-temperature (e.g. TT 0.15: 230->178 and
  286->199 across the two staves), i.e. cleaner notation than before at
  the same settings.

Added

• --hand-assignment on [experimental] reconsiders notes sitting close
  to the treble/bass split point within each chord, instead of assigning
  every note purely by which side of the line it falls on. A boundary
  note moves to the other hand if it's actually closer to that hand's
  recent position than to its naively-assigned hand's (e.g. "the left
  hand is already busy an octave lower"), and only if doing so doesn't
  stretch either hand's chord past --max-hand-span (default 16
  semitones, a 10th). Notes not near the boundary are never touched.
  Composes with either a fixed --split-pitch or --dynamic-split --
  refines whichever boundary is already in place rather than replacing
  it. Onsets that still need more than one hand's reach even after
  reassignment are reported as a real, unavoidable stretch rather than
  guessed at further. Off by default; available in interactive mode's
  advanced options too.
• --dynamic-split on re-estimates the treble/bass split point every
  --split-window-bars bars (default 8) instead of using one fixed
  split for the whole piece, so the split follows the music's register
  drifting over time (e.g. a verse sitting lower than a chorus). Off by
  default. A sparse window falls back to the previous window's split
  rather than a fresh guess, and the per-window change is capped at 4
  semitones, so it drifts instead of jumping around. Available in
  interactive mode's advanced options too.

Full Changelog