---
license: cc-by-nc-4.0
task_categories:
- audio-to-audio
---

# MSRBench: A Benchmarking Dataset for Music Source Restoration

MSRBench is the validation dataset for the MSR Challenge 2025 (https://msrchallenge.com); it contains 250 professionally mixed audio clips and their corresponding ground-truth targets under both original mix and 12 degradation scenarios in three categories.


## Download
`hf download yongyizang/MSRBench --repo-type dataset --local-dir {your output dir}`

Total file size after unzipping is 28.7 GB.

## Folder Structure
```
{root-of-this-repo}/
└── {Stem_Name}.zip
(after unzipping...)
    ├── mixture/
    │   ├── {song_id}_DT{degradation_type_id}.flac
    │   ├── {song_id}_DT{degradation_type_id}.flac
    │   └── ...
    └── targets/
        ├── {song_id}.flac
        ├── {song_id}.flac
        └── ...
```

Every *.flac file is 48 kHz stereo; each {stem_name} contains 250 song_ids, corresponding to 250 song clips; each song_id has 13 degradation types.

## Available Stems
- Vocals
- Guitars
- Bass
- Keyboards
- Synthesizers
- Drums
- Percussions
- Orchestral Elements

## Degradation Types

#### DT0: Original mixture produced by mixing engineers.

### DT1-4: Analog and Environmental Distortions
#### Radio (DT1)
Simulates FM broadcasting using GNU Radio's stereo multiplex encoding/decoding blocks with standard broadcast parameters:

**Signal Processing Parameters:**
- Audio sampling rate: 44.1 kHz
- Quadrature rate: 220.5 kHz  
- Pre-emphasis/de-emphasis time constant: 75 μs (US standard)
- Maximum frequency deviation: 75 kHz
- Stereo pilot tone: 19 kHz

**Channel Model:**
- **Rayleigh fading:** 8-sinusoid sum-of-sinusoids model with 20 Hz maximum Doppler shift
- **Carrier frequency offset:** σ = 0.1, max 1 kHz variations
- **Multipath channel:** 3-tap configuration
  - Delays: [0, 0.1, 0.5] ms
  - Relative magnitudes: [1.0, 0.8, 0.3]
- **Noise:** Additive white Gaussian noise at approximately 26 dB SNR (noise amplitude = 0.05)

#### Cassette (DT2)
Models magnetic tape coloration and noise using the DAW Cassette plugin by Klevgrand.[^1]

#### Vinyl (DT3)
Reproduces playback artifacts including crackle and mechanical noise using iZotope Vinyl,[^2] configured with the "1970" preset.

#### Live Sound (DT4)
Generated using:
- Impulse responses from PyRoomAcoustics
- Bandpass filtering to approximate phone microphone characteristics
- Environmental noise from the WHAM! dataset 48 kHz version mixed at approximately 20 dB SNR

### DT5-8: Traditional Lossy Audio Codecs

#### DT5: 64 Kbps AAC

#### DT6: 64 Kbps MP3

#### DT7: 128 Kbps AAC

#### DT8: 128 Kbps MP3

### DT9-12: Neural Audio Codecs

#### DT9: 22 kHz Descript Audio Codec (DAC)

#### DT10: 44 kHz DAC

#### DT11: 6 Kbps Encodec

#### DT12: 3 Kbps Encodec

---

[^1]: [Klevgrand DAW Cassette](https://klevgrand.com/products/dawcassette)
[^2]: [iZotope Vinyl](https://www.izotope.com/en/products/vinyl)