Dual-Branch Gated Fusion for Open-Set Audio Deepfake Source Tracing
Attributing a synthetic utterance to its originating system remains an open challenge: closed-set models fail to reject unseen synthesizers and produce overconfident predictions. To address this, we propose a dual-branch gated fusion framework that pairs XLSR-53 with CORES, a 66-dimensional descriptor that, unlike prior Linear Filter Bank (LFB)-only work, spans cepstral, oscillatory, rhythmic, energy, and spectral dimensions to capture complementary synthesis artifacts. Our analysis shows XLSR-53 remains discriminative in-domain (ID) while CORES generalizes stably under distribution shift (OOD), yet their naive concatenation fails due to SSL representational imbalance. To resolve this, an...
| Authors | Awais Khan, Kutub Uddin, Khalid Malik |
|---|---|
| Primary category | cs.SD |
| Published | 8 June 2026 |
| Last updated at source | 8 June 2026 |
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