01
VST3 plug-in
The native instrument follows host transport, tempo, meter, PPQ, and buffer position. Windows x64 with Cubase Elements 15 is the primary validation target.
Open source · VST3 MVP 0.1.0 · Pre-alpha
Sample-accurate metronome tools for musicians.
TempoFlow is a working host-synchronized VST3 metronome prototype built around a portable preset format for tempo, meter, grouping, accents, and click sounds.
Product direction
One musical contract, two focused tools
02
Portable presets
The versioned .tempoflow JSON format describes tempo,
meter, grouping, beat roles, sound selection, and playback mode.
Seven reference presets also generate native VST3 factory presets.
03
Shared semantics
The planned browser application and native plug-in share the schema, semantic rules, validator behavior, and reference presets—not application code or runtime dependencies.
Current status
Working prototype. Release work remains.
The VST3 processor, sample-accurate host synchronization, synthetic click engine, grouping-aware playback, project-state restoration, semantic preset validation, and native factory-preset generation are implemented and covered by automated tests.
Cubase Elements 15 discovers all seven factory presets, exposes their catalogue metadata, and restores user presets and project state. Windows x64 and unsigned macOS Universal builds are supported.
Audible triplet subdivisions, the complete Cubase validation matrix, a Windows installer, and final release verification are still open. There is no production release or supported binary download yet.
- Release target
- VST3 MVP 0.1.0
- Primary platform
- Windows 10 x64
- Primary host
- Cubase Elements 15
- Additional build
- macOS Universal, unsigned
- Technology
- C++17 · JUCE 9.0.2 · CMake
Path to the MVP
The remaining work is explicit
The live GitHub milestone is authoritative. The next release blockers are ordered by dependency rather than by marketing priority.
Now
Triplet playback
Define the audible triplet rules, then schedule three sample-accurate pulses per beat without weakening real-time guarantees.
Then
Regression and host validation
Cover grouping and triplet boundaries, then complete the Cubase matrix across sample rates, buffers, transport, and meter changes.
Release gate
Package and verify
Build and test the Windows installer, complete legal notices, and run the final automated, Steinberg, and Cubase verification suite.
Contribute
Help build TempoFlow carefully
Focused issues and pull requests are welcome. Review the contribution, security, real-time audio, and preset compatibility requirements before making changes.