A Dual-Mode Faust-to-CLAP Compilation System

Facundo Franchino; Stéphane Letz; Jatin Chowdhury

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arXiv · 2606.13193

A Dual-Mode Faust-to-CLAP Compilation System

Facundo Franchino·Stéphane Letz·Jatin Chowdhury

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Abstract

We describe faust2clap, a framework establishing the first officially maintained compilation pathway from Faust DSP specifications to the CLAP format. The system operates in two different modes. A static mode employs ahead-of-time compilation to yield native binaries of optimal efficiency, while a dynamic mode uses runtime interpretation to permit DSP code modification without interrupting the host application. This latter capability addresses a persistent friction in audio software development, namely the cumulative overhead of the edit, compile, and reload cycle. We detail the algorithmic machinery underlying both modes, focusing specifically on the problem of parameter identity. To preserve both parameter values and their bindings to host automation across structural DSP mutations, we introduce an address-based identity matching algorithm and a stable slot allocation scheme. The implementation, comprising approximately 2,400 lines of C++ architecture and Python tooling code, has been integrated into the main Faust distribution.

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Facundo Franchino, Stéphane Letz, Jatin Chowdhury. 2026-06-11. A Dual-Mode Faust-to-CLAP Compilation System. https://arxiv.org/abs/2606.13193

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