Gateway OS V1.0.8

Gateway OS V1.0.8

Public binary Apple Silicon realtime multicore performance release for Gateway OS.

Status

• Release type: Public binary Apple Silicon realtime multicore performance update
• Version: 1.0.8
• Source code: Not included in this release repository
• Included artifacts:
  • Windows VST3 x64
  • macOS AU
  • macOS VST3
• Previous V1.0.5, V1.0.6, and V1.0.7 binaries remain available as separate downloads.

V1.0.8 Apple Silicon Multicore Update

• Pushes high-oversampling Apple Silicon multicore mode beyond the conservative V1.0.7 lane limits.
• Uses the detected Apple performance-core cluster for 16x and 32x oversampling, limited by the selected oversampling factor.
• Keeps smaller modes conservative where thread overhead can dominate:
  • 4x: up to 2 realtime lanes
  • 8x: up to 4 realtime lanes
  • 16x and 32x: up to the detected performance-core count
• On an M2 Max-class 8-performance-core Mac, 16x/32x should report MC: On 8L.
• Extends the Apple Silicon realtime worker hot path so persistent polyphase workers stay ready across audio callbacks instead of repeatedly paying kernel wake latency.
• Retains the low-latency atomic Apple Silicon dispatcher introduced in V1.0.7.
• Keeps oversampling quality and audio output behavior unchanged.
• Keeps Windows VST3 multicore behavior unchanged.

Validation

• GitHub macOS build passed auval -v aufx G100 SMfo.
• VERIFYING CUSTOM UI passed.
• Staged macOS AU and VST3 bundles were ad-hoc signed and verified by codesign --verify --deep --strict.
• Windows VST3 and macOS AU/VST3 artifacts were built from source commit c047589.
• V1.0.8 private build workflows:
  • https://github.com/SlamminMofo/GatewayOS/actions/runs/27515371742
  • https://github.com/SlamminMofo/GatewayOS/actions/runs/27515371749

SHA256

• GatewayOS-V1.0.8-macOS-AU-VST3.zip
  • D61B9BD7FF581B99F66D3853AEC193F8204258A74B1D16FBAB0A83A984BC6748
• GatewayOS-V1.0.8-Windows-VST3-x64.zip
  • 54094F6513087567ED0D8E018B762C8A07C7768CE902E61FAE7AB5C8EF759AC4

Highlights

• Correct WaveNet-family oversampling modes: Off, 2x, 3x, 4x, 8x, 16x, and 32x.
• Supported models run at the requested internal multiple with time/dilation scaling to preserve capture feel while reducing aliasing.
• Multicore polyphase mode is designed to reduce oversampling wall-clock CPU cost while remaining bit-identical to single-core mode.
• Apple Silicon realtime multicore now uses more of the M-series performance-core cluster at high oversampling settings.
• Main-window OS/MC status readout.
• Theme-color selector with compact dot palette.
• EQ, noise gate, slim, input calibration, IR loading, and pre/post EQ routing included.

Research Background

• R. E. Crochiere and L. R. Rabiner, "Interpolation and Decimation of Digital Signals: A Tutorial Review", Proceedings of the IEEE, 1981. https://doi.org/10.1109/PROC.1981.11969
• P. P. Vaidyanathan, "Multirate Digital Filters, Filter Banks, Polyphase Networks, and Applications: A Tutorial", Proceedings of the IEEE, 1990. https://ieeexplore.ieee.org/document/52200
• J. O. Smith and P. Gossett, "A Flexible Sampling-Rate Conversion Method", ICASSP 1984. https://ccrma.stanford.edu/~jos/resample/
• Z. Cvetkovic and M. Vetterli, "Oversampled Filter Banks", IEEE Transactions on Signal Processing, 1998. https://doi.org/10.1109/78.668721
• J. D. Parker, V. Zavalishin, and E. Le Bivic, "Reducing the Aliasing of Nonlinear Waveshaping Using Continuous-Time Convolution", DAFx-16, 2016. https://www.dafx.de/paper-archive/2016/dafxpapers/20-DAFx-16_paper_27-PN.pdf
• A. Carson, V. Valimaki, A. Wright, and S. Bilbao, "Resampling Filter Design for Multirate Neural Audio Effect Processing", 2025. https://arxiv.org/abs/2501.18470
• R. Sato and J. O. Smith III, "Aliasing Reduction in Neural Amp Modeling by Smoothing Activations", 2025. https://arxiv.org/abs/2505.04082
• A. Carson, A. Wright, and S. Bilbao, "Anti-aliasing of Neural Distortion Effects via Model Fine Tuning", 2025. https://arxiv.org/abs/2505.11375
• A. Carson, A. Wright, J. Chowdhury, V. Valimaki, and S. Bilbao, "Sample Rate Independent Recurrent Neural Networks for Audio Effects Processing", 2024. https://arxiv.org/abs/2406.06293
• R. Yoneyama, A. Miyashita, R. Yamamoto, and T. Toda, "Wavehax: Aliasing-Free Neural Waveform Synthesis Based on 2D Convolution and Harmonic Prior for Reliable Complex Spectrogram Estimation", 2024. https://arxiv.org/abs/2411.06807

Install Notes

Windows:

• Copy Gateway OS V1.0.8.vst3 to C:\Program Files\Common Files\VST3\
• Rescan plugins in the DAW.

macOS:

• Copy Gateway OS V1.0.8.component to ~/Library/Audio/Plug-Ins/Components/
• Copy Gateway OS V1.0.8.vst3 to ~/Library/Audio/Plug-Ins/VST3/
• Rescan plugins in the DAW.

If a macOS host cached an older AU/VST3 metadata or UI state, reboot or clear the host/plugin cache before rescanning.