Changelog

Performance screen

• Four decks, the mixer and the browser stay usable in a 1280x720 window. PERF-UI-01.
• Controls that must feel instant (class A) have a stated latency budget and must not wait on a network round trip, and the app records the time from input to effect. LATENCY-01, LATENCY-03.
• Beat Sync never changes the master deck's tempo, and with the Beat Sync Max setting on, followers stay locked to the master's downbeat. LATENCY-05, DECKUX-14.
• Machine performance tiers scale the caches to your Mac. PERFMODE-01.
• Crash rescue from rolling on-disk snapshots of the decks. RESCUE-01.
• Cmd-Q asks before quitting and keeps audio playing until you confirm. INSTALL-21.

Mixer, stems and lyrics

• Stem mute and solo on every mixer channel strip. MIXUX-06.
• The STEM button turns a channel's EQ dials into stem levels. MIXUX-04.
• Per-stem mini-waveforms under each deck's waveform. DECKUX-19.
• Word-level lyrics as a lane on the waveform (LYR-03), and synced lyric lines beside the hot-cue bank (LYR-07).

Controllers

• The Mac app's window has no WebMIDI, so it never asks for MIDI access and says controllers are not supported there. CTRL-04.
• Source checkout in Chrome or Edge only, not the Mac app: a Pioneer DDJ-FLX4 device map, first hardware round Fri 18 Sep 2026. CTRL-01.

Library

• Point the app at a music folder with no rekordbox; tracks arrive labeled unanalyzed, with nothing guessed. SETUP-03.
• Tracks imported without vendor analysis are analyzed on import. PARITY-06.
• A scan that finds zero files where it found some fails loudly and changes nothing. LIBM-41.

Agents

• One typed command bus for UI, MIDI, keyboard and agents. AGENT-01.
• The opendj command line, inside the installed app. AGENT-05.
• An opendj mcp server in the app payload, with safety rails enforced server-side. AGENT-11.

Desktop app

• A Developer ID signing and notarization pipeline for the dmg exists in the private repository, with its secrets held outside the tree; whether the launch build is signed is listed on the download page when it is posted. OPS-14.
• In-app updates, proven from 0.1.3 to 0.1.5. OPS-15.
• Every build reports its own identity, and shows a visible fault when it cannot. INSTALL-07.
• Google sign-in works in a packaged install with no shell setup. Sign-in is optional and the app works without it; it is required for the stems relay route and to enroll a machine in a CloudSync hub. AUTH-01.
• Apple silicon (arm64) only, stated wherever a download is described. INSTALL-05.
• No paid feature exists, so everything is available to everyone. ENT-04.

Not in this release

• Windows and Linux. This alpha is macOS on Apple silicon only.
• MIDI controllers in the Mac app. They work in Chrome or Edge only from a source checkout.
• Choosing audio outputs inside the app: the app plays to the macOS default output, so set it in macOS Sound settings (CUEOUT-14 is open).
• Effects beyond the channel filter, and a sampler: both are planned controls that show as not built.
• Making stems from the installed app. Prepared stems play; the code to produce them is in the app, but STEM-39 stays open until a signed build separates a track on a clean Mac, so today stems come from a source checkout. Word-level lyric timings also come from a source checkout.
• Live stems, separated in real time during playback, are not built.
• Paid features. There are none.
• In-app import from Serato, Traktor and djay. First-run import covers rekordbox and music folders; the other adapters run from the command line.