title: 'Spleeter vs HTDemucs: Quality and Speed on Apple M4'
subtitle: Head-to-head comparison on 50 MUSDB18-7s test tracks -- SDR quality and
  processing time
run_date: March 15, 2026
run_timestamp: '2026-03-15T16:33:03'
device_htdemucs: Apple M4 MPS
device_spleeter: Apple M4 CPU (TensorFlow)
dataset: MUSDB18-7s
dataset_url: https://zenodo.org/record/1117372
n_tracks: 50
stems:
- vocals
- drums
- bass
- other
key_finding: See results table for SDR and speed comparison.
speedup_ratio: null
models:
- id: spleeter_4stems
  label: Spleeter (4-stem)
  device: CPU
  sdr_vocals: null
  sdr_drums: null
  sdr_bass: null
  sdr_other: null
  sdr_mean: null
  avg_time_seconds: null
  n_tracks: 0
- id: htdemucs
  label: HTDemucs (base)
  device: MPS
  sdr_vocals: 8.91
  sdr_drums: 10.58
  sdr_bass: 9.43
  sdr_other: 4.35
  sdr_mean: 8.32
  avg_time_seconds: 1.48
  n_tracks: 50
head_to_head:
- stem: vocals
  spleeter_sdr: null
  htdemucs_sdr: 8.91
  delta_htdemucs_minus_spleeter: null
  winner: null
- stem: drums
  spleeter_sdr: null
  htdemucs_sdr: 10.58
  delta_htdemucs_minus_spleeter: null
  winner: null
- stem: bass
  spleeter_sdr: null
  htdemucs_sdr: 9.43
  delta_htdemucs_minus_spleeter: null
  winner: null
- stem: other
  spleeter_sdr: null
  htdemucs_sdr: 4.35
  delta_htdemucs_minus_spleeter: null
  winner: null