sautiflow 0.6.2

High-fidelity, cross-platform Dart/Flutter audio engine for audiophiles, powered by miniaudio and native C++ FFI.

Changelog

0.6.2

Fix missing C++ headers in published package

0.6.1

• [Core] Added new getPipelineState() API to query the true native C++ audio engine pipeline state.
• Accurately tracks the flow from input source (sample rate, bit-depth format) -> internal DSP processing -> natively negotiated real hardware output format.
• [Apps/UI] Implemented the pipeline state viewer (Info Button) inside the Sautiplay app EQ Screen.

0.6.0

• [DSP Effects] Added new Stereo Widening feature using a hybrid Haas Effect + Mid/Side (M/S) Matrix algorithm.
  • Exposes setStereoWiden({required bool enabled, required double width, required double delayMs}) directly in MiniAudioPlayer and IsolateAudioPlayer.
  • Enables professional, mono-compatible "wide soundstage" manipulation without destructive phase cancellation.
• [UI/Apps] Integrated fully functional "Stereo Stage" configuration knobs into the Example app and Sautiplay EQ screens.
• [Apps] Added persistent state saving for the Stereo Widening options in Sautiplay's SharedPreferences.

0.5.0

• [Pitch & Spatialization] Added new advanced audio features natively using miniaudio:

  • Added robust Pitch Control with setPitch(double).
  • Added 3D Spatial Audio: Enable via setSpatializationEnabled(bool) and position sound sources in a 3D environment via setPosition(x,y,z), setDirection(), and setVelocity().
  • Configurable 3D Audio parameters: Doppler effect, attenuation models, rolloff factor, min/max gain, and distance thresholds.
  • Added customizable Fading: setFade(startVol, endVol, durationMs).
  • Added granular Playback Scheduling: scheduleStartTimeInPcmFrames(time) and scheduleStopTimeInPcmFrames(time).

• [Example App] Updated the demonstration app with UI sliders to configure Pitch shifting and 3D Spatial Audio in real-time.

• Integrated libsamplerate (Secret Rabbit Code) for audiophile-grade audio resampling.

• Added extensive new resampling algorithms via Flutter FFI to the native C++ audio engine:

  • srcSincBestQuality
  • srcSincMediumQuality
  • srcSincFastest
  • srcZeroOrderHold
  • srcLinear

• Exposed the new algorithms in MiniAudioPlayer.setEngineResampleAlgorithm(ResampleAlgorithm).

• Updated Windows and Android CMake build systems to natively compile libsamplerate alongside faad2 and miniaudio.

• Added m4a AAC decoding support via faad2.

• Enhanced example application with UI dropdown to dynamically change resampling algorithms on the fly.

0.4.0-dev

• Added standalone object-oriented filter API wrapping miniaudio natively (MiniaudioLpf1, MiniaudioLpf2, MiniaudioLpf, MiniaudioHpf1, etc).
• Added standalone MiniaudioBiquad filter wrapping.
• Added standalone MiniaudioResampler with support for algorithms (linear, sinc) and dithering modes.
• Added support for s24 and s32 AudioFormats in the native engine mappings.
• Re-architected C++ FFI to expose these standalone filters independently of the main AudioEngineHandle player.
• [Real-Time DSP] Injected custom ma_lpf1, ma_hpf1, and ma_biquad as native nodes in the main AudioEngineHandle data callback.
• [Real-Time DSP] Exposed setEngineResampleAlgorithm and setEngineDitherMode to dynamically re-configure the global audio device.
• Updated documentation and the example app to include interactive, real-time SLIDER and DROPDOWN controls for testing the native backend integrations.

0.3.0-dev

• Started unified mixed multiband FX implementation.
• Added new public Dart model types for user-defined band chains:
  • EqBandType (peak, bandpass, notch, lowshelf, highshelf)
  • EqBandConfig (per-band frequencyHz, q, gainDb, slope, enabled)
• Added MiniAudioPlayer APIs:
  • initMultibandFx(bands, enabled: true)
  • setMultibandFxBands(bands)
  • setMultibandFxEnabled(enabled)
  • clearMultibandFx()
• Wired new mixed multiband FX path through Dart FFI and native C/C++ ABI (ae_set_multiband_fx_*).
• Added initial realtime analyzer frame API for visualization pipelines:
  • Native C ABI: ae_set_analyzer_enabled, ae_configure_analyzer, ae_poll_analyzer_frame
  • Dart FFI + MiniAudioPlayer surface:
    • configureAnalyzer(frameSize: ...)
    • setAnalyzerEnabled(enabled)
    • getLatestAnalyzerFrame()
    • analyzerStream
• Added transition crossfade controls end-to-end:
  • setCrossfadeEnabled(bool)
  • setCrossfadeDurationMs(int) (native clamp 0..10000)
• Updated output sample-rate handling so setOutputSampleRate(0) now applies native device rate mode.

0.2.0

• Added new miniaudio-powered FX APIs:
  • setBandpass(enabled, cutoffHz, q)
  • setPeakEq(enabled, gainDb, q, frequencyHz)
  • setNotch(enabled, q, frequencyHz)
  • setLowshelf(enabled, gainDb, slope, frequencyHz)
  • setHighshelf(enabled, gainDb, slope, frequencyHz)
• Wired new FX end-to-end across native engine, Dart FFI, and public MiniAudioPlayer API.
• Expanded example EQ screen with interactive controls for the new FX for easier testing.
• Updated documentation and feature lists to include the new filter/EQ set.

0.1.0

• Initial release of sautiflow.
• Cross-platform audio playback engine via miniaudio and Dart FFI.
• Playlist controls: play, pause, stop, seek, next, previous, jump, shuffle, loop.
• Audio effects support: gain, pan, EQ, reverb, low/high-pass, delay.
• Platform support: Android, iOS, macOS, Linux, and Windows.