perth-coreml

iliasaz/perth-coreml

perth-coreml is a machine learning model from iliasaz. Use it for the machine learning task on the model card, and read the license before you ship it in a product. It is set up for coreml. The card lists the license as mit.

CoreML conversion of Perth-Net Implicit, the inaudible audio watermarker from Resemble AI's Perth, for iOS 18+ / macOS 15+. The encoder and decoder convolution stacks run as CoreML packages (on the Apple Neural Engine…

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At a glance

Library: coreml
License: mit
Access: Public
Created: Jul 11, 2026
Updated: Sep 12, 2026
SHA: f1722875

Model card

From the Hugging Face model README

Perth-Net Implicit — CoreML

CoreML conversion of Perth-Net Implicit, the inaudible audio watermarker from Resemble AI's Perth, for iOS 18+ / macOS 15+. The encoder and decoder convolution stacks run as CoreML packages (on the Apple Neural Engine by default); the STFT/ISTFT, magnitude masking and resampling run on the host in Accelerate, since CoreML has no complex-number support.

These files are loaded by the Swift package iliasaz/perth-coreml, and used by iliasaz/chatterbox-coreml to watermark every utterance it generates — as upstream Chatterbox does.

Which file you need

file	precision	size	needed for
`PerthEncoder.mlpackage`	fp16	4.7 MB	embedding a watermark (`applyWatermark`) — the only file chatterbox-coreml downloads
`PerthDecoder.mlpackage`	fp16	14.0 MB	detecting a watermark (`getWatermark`)
`PerthEncoder_fp32.mlpackage`, `PerthDecoder_fp32.mlpackage`	fp32	9.5 MB, 28.0 MB	numeric-parity reference tier — not needed at runtime
`perth_assets.json`, `perth_resampler.json`	—	46 KB	DSP constants written alongside the conversion; the Swift runtime embeds the same constants and does not read these

If you only embed, fetch only the encoder:

hf download iliasaz/perth-coreml --include "PerthEncoder.mlpackage/*" --local-dir ./perth

Every package declares Float32 inputs and outputs; the fp16 packages differ only in compute precision. Accuracy against stock Python Perth is documented in the perth-coreml README.

License

MIT. These packages are a CoreML format conversion of the Perth-Net Implicit checkpoint that Resemble AI publishes under the MIT licence (resemble-perth); the conversion inherits those terms, and copyright in the weights stays with Resemble AI — no claim of ownership is made over them here. Redistribute with attribution to Resemble AI.

Library: coreml
License: mit
Created: Jul 11, 2026
Updated: Sep 12, 2026