[ddri]

Summary

Completes Batcherbird's native capture → review → save session → export workflow. Captures now use the actual audio-device configuration, retain completed takes when stopped, and release MIDI notes during cancellation and worker cleanup. Review supports selecting, auditioning, and replacing individual takes, with portable lossless sessions and post-batch recovery.

• Correct stereo frame handling, playback sample-rate conversion, capture overflow/error reporting, and responsive cancellation. Preview completion retains the stream for the final buffer’s estimated playback deadline with a conservative drain allowance; Stop remains immediate.
• Generate consistent processed WAVs and DecentSampler/SFZ mappings, including sparse key coverage, non-overlapping velocity zones, relative sample paths, and frame-correct loop coordinates.
• Redesign the desktop with collapsible settings, more waveform space, clear capture/review/export actions, and guarded asynchronous operations. Preserve unsaved work with an in-app Keep current session / Open replacement confirmation after the candidate validates; long session filenames truncate within the toolbar.
• Persist export settings, including opt-in experimental looping and a silence-trim toggle for quiet attacks. Export processing operates on a copy of the original recordings.
• Stage macOS packages transactionally, preserve existing artifacts on failure, derive minimum OS from the binary, strengthen CI, and document desktop/hardware acceptance gates.

Post-batch recovery restores the last captured batch and its settings; opening or editing another saved session does not update that checkpoint. Generated app/DMG and QA audio artifacts are local and are not committed.

Validation

• cargo test --workspace --offline: 142 passed, 0 failed, 1 ignored (real audio hardware required).

• cargo clippy --workspace --all-targets --offline -- -D warnings, formatting, and diff whitespace checks passed. The same strict checks were reproduced with CI's Rust 1.99 toolchain; newer Clippy warnings were corrected without weakening the CI gate.

• Packaging rollback/metadata fixtures passed; release build and local app/DMG packaging succeeded. Plist validates, packaged binary matches the release build, and hdiutil verify reports a valid DMG checksum.

• Preview regression tests distinguish final-buffer submission from completion, retain conservative drain time, and verify immediate Stop. Session-replacement tests verify full settings/audio retention on Keep current and applying only the validated candidate on confirmation. Parallel workflow test directories use an atomic sequence to prevent clock-tick collisions.

• Artifact-based workflow tests verify moved sessions, exact float audio restoration, completed-take/canceled-re-record retention, stereo/quiet-attack/release preservation, and every key/velocity in the fixture range matching exactly one region in both presets.

• Native demo QA loaded six takes through Open, selected a sample with visible keyboard focus, saved a portable session with all six full-length stereo float recordings, and exported six 48kHz stereo 24-bit WAVs plus DecentSampler/SFZ presets through the native folder chooser.

• Explicit accessibility values identify ordinary desktop buttons; checked-row labels and accessibility activation still need a Vizia framework fix.

• Reusable six-take QA session generator stores an absolute export destination; desktop/hardware test procedures include observed results and remaining checks.

• GitHub CI on b6dbf0c: desktop workflow/strict Rust checks, macOS app/DMG packaging and checksum verification, and experimental Linux checks all passed.

Remaining validation

Ready for code review; all automated CI checks pass. The following acceptance checks remain release requirements and do not block reviewing this implementation. The revised layout, Tab/Return activation, load, save, and combined export have native observations. Playback/listening, minimum-size resizing, the new in-app replacement confirmation’s rendering/keyboard behavior, invalid-file recovery, dialog cancellation, Shift+Tab/shortcuts, and full VoiceOver support remain to be verified. Real synth/interface capture, DecentSampler/SFZ player listening, clean installation and microphone permissions, and distribution signing/notarization remain pending. Current local packaging is Apple Silicon; Intel and broader OS compatibility are unverified.

Automatic loops remain experimental. Default silence trimming uses a −40dB threshold and can remove very quiet attacks; users can disable trimming to retain the full take. The quiet-attack trimming test deliberately uses a lower threshold. No release tag is created by this PR.

[ddri]

Merged-work handoff — October 5, 2026

This PR is merged into main at e47220f. Implementation validation finished with 142 passing tests, one real-hardware test ignored, strict Clippy/formatting passing, and all three CI jobs passing on PR head b6dbf0c.

The next session is tracked in #3: the complete 30-minute hardware acceptance procedure, a checklist, equipment/results template, instructions to build current main, and the remaining desktop/accessibility/installation/signing release gates are recorded there.

Real synth/interface capture and DecentSampler/SFZ listening remain untested. The latest in-app confirmation also still needs native visual/keyboard verification after automation disconnected. No release has been published. Resume from #3 when the hardware is available.