DJ TrackBuilder MixAuto Pro — source checkpoint 0.6.1 (Xcode build blockers corrected)

The FIRST approved nine-page Canva design is the only visual target: open the canonical concept. The later redesign is rejected. This is a separate project from Stripewolf Wave, ARTSS DJ Creator and DJ NOVA.

Project state: SOURCE ONLY. No separate GitHub repo, signed IPA, device installation, published URL or verified iPhone playback exists. The completed portable Linux tests below cannot prove Core Audio runtime behavior.

What this source currently contains

• C++17 real-time dual-deck synth sequencer with four 16-step pattern banks, original Kick/Hat/Bass voices, velocity, swing, smoothed EQ/filters/echo, crossfader and Pattern AutoMix.
• SwiftUI iPhone-first DJ Cockpit following the graphite/cyan/coral original Canva identity, two distinct decks with vertical PCM-derived 5-band spectral waveform energy, fixed transport and mode rail.
• Native iOS file-deck sources with AVAudioPlayerNode, EQ/delay, file import, play/cue, eight live Hot Cues per deck, sample-segment seek and bounded file loops (4/8/16 approximate beats); Apple runtime unverified.
• Beat hint estimate, grid correction, conservative unwarped file transition and immediate manual fader takeover. These do NOT provide pitch-preserving Sync or phrase-aware beat matching.
• Real mute/solo for synthesized Kick/Hat/Bass on each deck. Imported-song four-channel STEMS NOT available.
• Native mixer WAV recording pipeline and offline original-pattern WAV render. Native recording runtime unverified.
• JSON project store, backwards-compatible audio manifests, off-callback waveform analysis, C++/Swift automated tests and macOS simulator GitHub Actions template.

Verify portable code

scripts/verify_linux.sh

Checks 5 Release C++ suites, 5 Clang sanitizers suites, portable Swift Foundation model/algorithm tests (including route safety and background cancellation), Swift syntax parsing and real 16-second WAV format/peaks. No connected Mac/Xcode or physical iPhone available in this environment.

Build and exercise real Apple Audio Units on a Mac

Version 0.6.0 introduces an XcodeGen XCTest integration target using Apple's actual AVAudioEngine in offline/manual mode. It feeds two independently scheduled audio files into EQ/Delay/mixer and verifies nonzero PCM output; a second test checks repeated AVAudioPlayerNode .loops output. XCUITest UI smokes open WAVE/MIX/STEMS/BUILDER/FX/AUTO and save simulator screenshots. These checks are prepared but have not been executed, since no macOS host is connected. They cannot prove iPhone audio latency, speaker routing or master recording.

From the source root on any appropriately configured Mac with Xcode + XcodeGen:

scripts/ios_build_on_mac.sh

It produces ios-build-results/ with a simulator-only unsigned .app, XCTest result bundle, test logs and the cockpit screenshot. The file is not an IPA and cannot be installed on a physical iPhone. The same test matrix runs in .github/workflows/ci.yml when this project has its OWN isolated GitHub repo. No other DJ app repository should be used as a substitute.

Alternative manual simulator build on Mac

brew install xcodegen
xcodegen generate --spec project.yml
xcodebuild -project DJTrackBuilderMixAutoPro.xcodeproj \
  -scheme DJTrackBuilderMixAutoPro \
  -sdk iphonesimulator -destination 'generic/platform=iOS Simulator' \
  -configuration Debug CODE_SIGNING_ALLOWED=NO build

Then validate both imported decks, file loops, live WAV recording, accessibility and route changes on an actual iPhone. The Xcode build commands are instructions, not proof they succeeded.

Safety and reliability corrections in 0.5.1

• Headphone or Bluetooth output disconnect pauses all decks even if the output sample rate is unchanged. Any live recording is stopped safely; the user must explicitly tap PLAY again.
• Long-running waveform/tempo/file-loop/import/export work now propagates parent cancellation into its detached worker to avoid stale CPU load, waveform data, and unnecessary disk work after a deck changes.
• Import destination path is reserved on the owning task; a canceled/failed background file copy is cleaned up rather than being left as an orphan.
• iOS bundle and CMake versions are aligned at 0.5.1. Sanitized CMake build directories are excluded from the source ZIP and cannot inflate or leak binaries into delivery.

Project docs

• 0.5.1 reliability fixes, safety and tests
• 0.5.2 route safety, cancellation and packaging
• 0.5.0 engineering and evidence
• Release readiness and missing Apple runtime gates
• First Canva visual conformance matrix
• Core audio architecture
• 0.4.0 historical checkpoint

Checkpoint packaging

python3 scripts/package_source.py /path/to/DJ-TrackBuilder-MixAuto-Pro-0.5.0-Source-Checkpoint.zip

The source-only ZIP includes a SOURCE_SHA256SUMS.txt manifest and excludes generated build directories, artifacts and private credentials. No paid/third-party music or third-party DJ artwork is bundled. Do not request release approval until Xcode, iPhone sound, navigation and original Canva visual QA are actually proven.

Current 0.6.0 validation status

Portable DSP and Swift Foundation tests: run scripts/verify_linux.sh. Apple's audio graph integration tests and SwiftUI UI smoke: not run on this Linux host; GitHub Actions macOS template and local one-command Mac script are supplied. A real installation requires signing/provisioning after those builds pass. Preserve the first nine-page Canva design as sole visual target.

0.6.1 Xcode gate corrections

• SWIFT_VERSION uses the supported Swift 5 language compatibility mode (5.0) instead of an unsupported toolchain-specific 5.9 string. Modern Swift compiler remains selected by installed Xcode.
• A #if DEBUG-only deterministic dual-file fixture is loaded exclusively for an explicit --mixauto-ui-seeded XCUITest launch argument. CI tests actual imported-file UI, persistence, two player controls, and Hot Cue activation without relying on a Files picker. Ordinary release/user data is unaffected.
• The UI test opens the Hot Cue Menu before selecting pages 5–8, correcting an impossible control lookup.
• Apple's audio graph test helper was renamed so XCTest does not interpret a returning factory method as a test.
• Temporary CI branch mixauto-ios-ci is eligible to run this workflow as a staging lane, without changing another project's default branch. A proper standalone repository remains the production target.

These changes are prepared, not proof of an iOS runtime build until GitHub-hosted macOS tests return successful runs.