HyperION v1.0.1 — Pattern Workflow, MIDI Stability & Export Reliability

This release delivers a major stability and workflow pass across Pattern sequencing, Instrument Tracks, VST playback, export, AI-assisted tools, the sample browser, and editing workflows.

Highlights

Rebuilt Pattern and Instrument Track MIDI ownership to prevent clips, notes, and VST instances from interfering with one another.
Added an FL-style global Pattern rack while keeping each Pattern's musical content independent.
Added reliable Pattern VST rendering to Full Song and Stem exports, with real progress reporting.
Expanded Step Sequencer editing, Pattern splitting, stopped-transport preview, and arrangement clip visualization.
Improved BYOK AI provider responsiveness, Demo Song variation, Drum Generator control, browser indexing, and long-session memory behavior.

What's New

Pattern and Step Sequencer workflow

Added a shared global channel/slot rack across all Patterns.
VST assignments, samples, lane names, and channel settings now stay synchronized between Patterns.
Steps, Piano Roll notes, expression data, Pattern length, mixer levels, and automation remain independent per Pattern.
Added Split by Channel for occupied lanes. Each populated channel can be placed on its own Arrangement Pattern track while empty slots are skipped.
Added FL-style Pattern clip previews using aligned, color-coded step and note blocks instead of waveform placeholders.
Removed redundant Pattern clip labels so musical content starts at the beginning of the clip.
Added Step Sequencer selection and editing commands: Ctrl+C, Ctrl+X, Ctrl+V, Ctrl+D, Ctrl+A, Ctrl+Z, Ctrl+Y, Delete/Backspace, and Escape.
Step clipboard data preserves velocity, probability, pan, pitch, gate/length, micro-timing, ratchet/roll, automation, expression, accent, slide, and lane mute state.
Added transaction-based undo/redo history for Step Sequencer edits.
Changed the default Drum Pattern label to Pattern.

Instrument Tracks and MIDI clips

Instrument Track MIDI clips are now independent snapshots rather than live Pattern-linked proxies.
Existing projects with legacy pattern:// Instrument Track clips are migrated without deleting their notes.
Pattern generation no longer clears or rewrites unrelated Instrument Track MIDI clips.
Piano, chord, arpeggio, and quick generators now replace only the target beat range while preserving the rest of the clip.
Instrument Tracks automatically adopt the assigned VST instrument name.
Instrument Track MIDI clips use the track name instead of inheriting a Pattern name.
Added Open Plugin Editor to the Instrument Track context menu.

Export and rendering

Full Song and Stem exports now render live Pattern VST instruments correctly.
Added explicit export scopes for Song, Pattern, Selection, and Stems.
Prevented cached Pattern preview audio from being mixed on top of live Pattern VST rendering.
Export cleanup now resets temporary realtime MIDI and active-note state without leaving VSTs silent or corrupted afterward.
Added real export progress with render stage, percentage, processed samples, track/stem counters, elapsed time, render speed, ETA, cancellation, and error state.

AI and music generation

BYOK provider discovery, validation, capability loading, and model loading now run asynchronously.
Changing providers cancels stale requests, and changing a model no longer restarts the provider unnecessarily.
Added safer callback lifetime handling, terminal job cleanup, timeout/cancellation behavior, and throttled progress snapshots.
Demo Song generation now uses fresh seeds and responds more meaningfully to its settings.
Improved progression, motif, harmony, melody, rhythm, and kick/bass relationships for more varied but musically coherent results.
Drum Generator now supports per-channel Generate, Keep Existing, Clear, and Disabled modes.
Added targeted generation for Kick, Snare, Clap, Closed/Open Hat, Percussion, Tom, Rim, Shaker, Crash, Ride, Cymbal, FX, and 808 lanes.
Added deterministic seed behavior and new-take randomization across House, Trap, Boom Bap, Techno, DnB, and Reggaeton foundations.

Browser and bundled content

The browser now indexes these active library roots:
- Assets/FactorySamples: 3,949 official media files
- Assets/Samples: 5,659 third-party CC0 media files
A total of 9,608 local sample/MIDI assets are included in the catalog.
Removed the obsolete empty Assets/Factory root from scanning and packaging.
Old or incomplete browser caches are detected and rebuilt automatically.
Cache validation now compares the actual supported file set and preserves absolute source paths, preventing collisions between identical relative filenames.
Improved Instruments and Vocals classification, including semantic filename/metadata inference and One Shot aliases.
Added browser search filters for tag:, bpm: and key:.
Reworked background library scanning to build a complete local list before publishing it as an immutable snapshot.
Browser UI readers no longer hold a direct reference to a sample vector that can be modified by the scanner thread.
Fixed a sample-library race condition that could invalidate browser data and trigger heap corruption during background scans.

Plug-ins and UI

Redesigned the HyperION Instrument Suite layout with separated title and action bars, cleaner preset browsing, improved macro labeling, and fixed overlapping controls.
Improved Pattern clip rendering with pixel-aligned notes, consistent thickness, and cleaner geometry.
PhaseFlow automation scenes now reach the DSP through immutable realtime snapshots without audio-thread locking or allocation.
PhaseFlow volume envelopes, depth, amount, global mix, smoothing, bypass, MIDI trigger/latch, swing, loop, and hold behavior are now connected to the audio path.
Improved PhaseFlow scaling and active-theme integration.
Added a standalone Hyperion Plugin Scanner.exe application.
VST scanning now prefers the separate scanner and isolates individual plug-ins in worker processes, preventing a faulty plug-in from taking down the main DAW.
Added a Windows multi-resolution application icon with native 16, 20, 24, 32, 40, 48, 64, 96, 128, and 256 px layers for sharper Explorer, taskbar, shortcut, and desktop rendering.

Release and distribution

Centralized the application version and synchronized CMake, build metadata, FileVersion, and ProductVersion at 1.0.1.
Kept JUCE and the application core statically linked instead of adding unnecessary runtime DLL dependencies.
Produced and verified a clean Windows Release build containing both the main DAW and standalone plug-in scanner.
Produced a new Windows installer containing the complete official and CC0 sample libraries.
Installer size: 2,097,851,746 bytes.
Installer SHA-256: 062ED892C22246A3CD4784D2ACBCF5A1C88B43255E3E28C2F86E7A4966CECABB.

Fixed

Pattern playback and VST processing

Fixed the selected Pattern being forced into playback while Song mode was playing other Arrangement Patterns.
Fixed multiple Patterns sharing and repeatedly processing the same VST instance in one audio block.
MIDI from Patterns sharing a VST is now merged before the VST is processed once per block.
Fixed one Pattern stopping or muting the VST sound of another active Pattern.
Fixed Pattern note ownership collisions caused by identical lane/note indexes across different Patterns.
Fixed Pattern changes overwriting other Patterns' lane, mixer, and VST state.
Fixed Step Sequencer VST on/off state not affecting the actual audio path.
Fixed stopped-transport pad, step, Piano Roll, and plug-in keyboard preview.
Fixed old VST preview notes causing unrelated slots to sound while editing a step.
Fixed stopped-preview audio being cleared by the MixerGraph before reaching the output.

MIDI scheduling and note integrity

Fixed Arrangement MIDI events leaking beyond visible clip boundaries.
Long notes now receive a source-selective note-off at the clip end.
Fixed Arrangement and Pattern schedulers competing for the same instrument in Pattern mode.
Added source-aware ownership for Arrangement, Pattern, Piano Roll preview, Step preview, external/live, and plug-in UI notes.
Transport stop now releases playback voices without killing held live-preview notes.
Fixed same-note note-on/note-off ordering at boundaries between multiple MIDI clips on one Instrument Track.
Fixed clip Event FX causing long MIDI notes to retrigger on every audio block.
Fixed track VST processing being repeated for every Event FX clip and tail.
Fixed generator commands clearing entire MIDI clips instead of their intended ranges.

Stability and performance

Removed automatic large crash-dump generation because dump files could consume excessive disk space.
HyperION now writes diagnostics to a single lightweight Documents/HYPERION/Logs/log.txt file, capped to approximately 512 KB at startup.
Crash logs retain the exception code and description, fault address, module, RVA, thread, and available stack information. Exception 0xC0000374 is identified explicitly as Heap Corruption.
Added a per-user Windows Error Reporting exclusion for HyperION and the standalone scanner so new full memory dumps are not generated by WER.
Added entry- and byte-limited LRU eviction to the sample cache.
Moved sample decoding outside the cache lock to reduce blocking.
Fixed AI job and callback lifetime retention after terminal states.
Reduced excessive AI progress snapshot churn.
Improved realtime-safe state transfer and allocation behavior in PhaseFlow.

Validation

Windows Release build completed successfully with JUCE 8.
Full automated suite: 19/19 tests passed at the main stability checkpoint.
Final post-hardening acceptance run: 38 passed, 0 failed.
Repeated post-fix Release builds and PatternLaneVoiceTests runs passed.
AIMusicGenerationTests passed.
PhaseFlowTests passed across 44.1/48/96/192 kHz, mono/stereo, and 1–2048 sample block sizes.
VocalSculptorTests: 1,474 checks passed.
HyperMasterLabTests: 736 checks passed.
HyperION Instrument Suite audit: 109 factory presets passed.
Sample and Pattern regression tests passed with the immutable library snapshot implementation.
Standalone scanner launch and isolated worker mode were verified.
Main DAW startup remained stable during the initial background library scan.
Both Hyperion.exe and Hyperion Plugin Scanner.exe report version 1.0.1.
The new multi-resolution icon was verified from the built executable.

Known Notes

Representative third-party VSTs, including plug-ins with custom offline-render or licensing behavior, still require manual compatibility testing.
A 30–60 minute real-world GUI/VST soak test remains recommended.
ETA may fluctuate during very short renders.
Existing compiler warnings from deprecated JUCE APIs and numeric conversions remain, but no new build failures were introduced by this release.