c8acc3827d
Recording & audio: - Master-bus WAV recorder: arm + FX-tail + SAF output folder on the mixer toolbar; allocation-free capture (ring buffer -> writer thread). - Oboe is now the default backend; falls back to AudioTrack only on init error and shows a popup. Removed the manual engine toggle. - Arpeggiator: fixed loop-boundary slip (phase-continuous), monophonic (no chord/voice pile-up), and a per-bar reset toggle. - AmbienceReverb: 8-line FDN (was 16) to fit the real-time budget; per-bus soft-clip limiter; per-channel non-finite guard on the master sum. UI / layout: - Responsive landscape layouts: side nav rail; tracker grid beside the arrangement/keyboard; toolbox tiles beside a wider keyboard; two-column mixer strips; collapsed transport toolbar. - Two-column instrument/effect editors; reverb controls paged with dot pagination. - Arrangement: per-lane mute toggles; center-follow scrolling. - Tracker toolbar: BLK dropdown, SKIP moved by OFF/KBD, glyph edit buttons. - Sampler: normalize button, per-pad volume snap, single CLEAR. - Import error popups; content validation on all file loaders. - App themes: import/export/delete/dropdown library (stock themes protected). Persistence & QoL: - Persist keyboard MIDI channel/octave; remember loaded project in the settings dropdown; New Project button. Cleanup: - Removed dead code and fixed audio-thread allocation hot spots (per-sample iterators, Math.random on the RT thread, etc.). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Sizzletracker (Android)
A retro, grid-based music tracker for Android — monospace UI, pixel icons, demoscene-style pattern editing — playable equally with touch, keyboard, gamepad, and MIDI (USB or Bluetooth).
Features at a glance
- Tracker tab — 4-track pattern grid (note / velocity-hex / MIDI-channel per track), beat & bar coloring, tap-to-focus + drag-to-edit with haptics and scale-aware note entry; plus an 8-lane arrangement piano-roll (up to 256 beats) with A/B loop regions.
- Mix tab — 4 channels, each with an instrument + 4 FX slots, MIDI channel, volume, mute/solo.
- Toolbox tab — 16 slots for instruments (NES synth, sampler, SF2/XI) and effects (arp, transposer, LFO, tape delay, reverb, filters, 10-band EQ, bitcrusher). Every device has an auto-generated editor and text presets.
- Setup tab —
.sngproject save/load, color themes (with import/export), gamepad bindings, and searchable/collapsible MIDI bindings. - Background playback with a media notification (Play/Pause/Stop).
- Two-thread design — Compose UI on the main thread, a sample-accurate sound engine on its own high-priority thread.
Build & run
Open the project in Android Studio (2024.1+), let it create the Gradle wrapper if prompted, and Run on an API 26+ device or emulator.
CLI (after the wrapper exists — gradle wrapper --gradle-version 8.9):
./gradlew assembleDebug
Where to start reading
See docs/DEVELOPER_HANDOVER.md — a from-scratch tour written for a developer new to Android: architecture, the file map, the "one action / one song / two threads" model, how to add an instrument or input, and an honest implemented-vs-TODO list.
Fastest orientation in code:
model/Project.kt → input/InputAction.kt → ui/AppViewModel.kt →
audio/AudioEngine.kt.
Project format
Songs use a human-readable .sng text format (see io/ProjectIo.kt), aligned in
spirit with the desktop
Sizzletracker; a byte-exact
compatibility shim is a listed TODO in the handover doc.
License
TBD by the project owner.