DAC20k checkpoint study · +10 dB SNR

Same panel.
New checkpoint.
Listen.

The exact 40 clips from the prior showcase, re-run through the four-layer DAC20k online-noise model at its final coherent checkpoint.

Checkpoint — Frozen DAC 10 codebooks Solver Heun-2 Input +10.0 dB
Lineage-seen mel reduction——
Prior-unseen mel reduction——
Prior-unseen SI-SDR gain—enhanced minus noisy
Fixed comparison panel4020 lineage-seen · 20 prior-unseen

Direct comparison

The panel stays fixed.

Every source clip, noise seed, normalization rule, and frozen 10-codebook codec matches the prior page. Enhancement now uses the sampler-benchmark winner, Heun-2: one predictor/corrector interval and exactly two model evaluations. “Lineage seen” means present in the step-105k warm-start training set. “Prior unseen” means disjoint from that set by path, filename, and content hash. This is not a strictly recording-disjoint DAC20k test: seven clips in each cohort share a recording with DAC20k train, and one lineage-seen clip is an exact DAC20k train path.

Ground truthNormalized source
NoisyCorrupt → frozen codec
EnhancedHeun-2 → frozen decoder

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