Pre-generated mels were using a bare forward pass with no classifier-free
guidance, producing mels that don't match what the vocoder sees at inference
(where cfg_strength=4.5 is the default). Now uses ode_wrapper with
preprocess_conditions/get_empty_conditions, same as the sampler node.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>