Audio super resolution, 16 kHz in to 48 kHz out. This model was converted to MLX format from alibabasglab/MossFormer2_SR_48K.

Code: starkdmi/mossformer_sr_mlx

config.json is required: this model builds its architecture from the file rather than hardcoding one, so a download without it cannot load.

Bold marks the best value in each column. Quality is int8 against this model's own fp32 output — the cost of the precision change, not a score for the model.

Integer quantization reaches only the Linear modules, and this model's Generator is almost entirely convolutions, so speed and memory are close to unchanged between the two. int8 trades 30% of the download for 62.5 dB.

Measured on an Apple M1 Pro (16 GB), 30 s of audio, three timed runs per configuration; speed is realtime factor. These are single-machine figures — expect different absolute numbers on other hardware, and treat the ordering as indicative rather than guaranteed.