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44k variants use BigVGANv2 directly as the vocoder (no wrapper, no @inference_mode decorator), accessible at feature_utils.tod.vocoder. 16k wraps BigVGANVocoder inside BigVGAN, accessed at .vocoder.vocoder. Both trainer and loader now branch on model["mode"]. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>