Release notes and version history

Changelog

Configurable pressure buffer size (pressure_buffer_size): Controls how many pressure samples are collected before the initial note fires. A larger buffer gives the pressure sensor more time to register strike force, producing louder and more consistent velocity on taps and initial strum contact. Configurable via the dashboard UI or config file (default: 10, range: 2-40).
Peak pressure velocity: The initial note velocity is now based on the highest pressure seen during the buffer window, rather than the last sample. This prevents velocity from dropping on quick hard taps where pressure peaks early then declines.
Tap-on-release: If the pen is lifted before the pressure buffer fills (a quick tap), the note fires immediately on release using the peak pressure from whatever samples were collected. Quick taps are never silently dropped regardless of buffer size.
Fixed tiltXY calculation (Python): The combined tilt value used for note duration control now uses the correct magnitude formula (sqrt(tiltX² + tiltY²)) matching the Node.js implementation, instead of a simple average that produced shorter durations.

Graceful shutdown reliability: Fixed an issue where the process would hang on Ctrl+C or systemctl stop. The signal handler no longer calls blocking cleanup from the signal context — instead it cancels asyncio tasks and lets the event loop's finally block handle cleanup in the correct order.
WebSocket shutdown timeout: Added 2-second timeouts to WebSocket client close and server wait_closed() calls to prevent hanging when clients disconnect uncleanly.
Note scheduler shutdown: The NoteScheduler thread (daemon=False) is now explicitly stopped during shutdown, preventing the process from blocking on exit.
systemd TimeoutStopSec: Added TimeoutStopSec=10 to both ALSA and Zynthian service files so systemd force-kills after 10 seconds instead of the default 90.

Removed automatic device monitoring: Background MIDI port scanning has been replaced with manual refresh via the dashboard UI. This eliminates race conditions and reduces system complexity.
Manual device refresh: New "Refresh Devices" button in the dashboard for updating the MIDI device list.
Removed "omni mode": Removed Omnimode, or sending notes on all MIDI channels. There was some weird behavior on Python that made the strum sound bad, and it's not clear we actually need this feature anyway. It'll be a future improvement if we do

MIDI channel off-by-one: Standardized MIDI channels to be 0-indexed internally and 1-indexed in user-facing config files and UI.
XP Deco button handling: Fixed button handling in Blankslate for the XP Deco tablet.
Removed button names feature: Removed custom button naming from action rules configuration. Button labels now use system defaults.