**Training Set (`train.csv`)**
  - Columns:
    - `file` — path to the mixed audio recording
    - `sig_1` — first original environmental sound
    - `sig_2` — second original environmental sound
  - Mono audio signals
  - Each signal contains exactly **16,000 samples**

**Test Set (`test.csv`)**
  - Columns:
    - `ID`
    - `file` — path to a mixed audio recording
  - Ground truth signals are not provided