Checklist AICC 2025 Round 2 · Task 2
Audio Demixing
Separate each mixed mono recording of 16,000 samples into its two original environmental sound sources.
The task
In Santa's workshop, spilled cocoa caused an audio mixer to combine two environmental recordings into one track. The contestant must reconstruct the two original sources for each mixed recording.
Each input is a mono mixed waveform of 16,000 samples containing exactly two overlaid environmental sounds. Training rows give the mixture and both original signals (each 16,000 samples); test rows give only the mixture. The order of the two output signals does not matter.
For each test mixture the contestant outputs two reconstructed waveforms of continuous float values.
Abridged by SOTA from the official materials. The official statement has the exact rules, and it wins wherever this summary differs.
At a glance
- You get
data/train.csv(file,sig_1,sig_2) anddata/test.csv(ID, file).- You submit
submission.csvwith columns ID,sig_1,sig_2; each signal is a Base85-encoded float32 array of exactly 16,000 values; row order must matchtest.csv.- Scoring
- Per-sample permutation-invariant mean squared error: min(MSE(
sig_1, ŝ_1) + MSE(sig_2, ŝ_2), MSE(sig_1, ŝ_2) + MSE(sig_2, ŝ_1)), averaged over samples; lower is better. - Rules
- Individual participation (maximum team size 1); at most 100 submissions per day.
- AICC contest rules (stated on each Kaggle rules page, not enforceable): no use of LLMs for writing code or getting task ideas; no internet use other than official library documentation and the contest platform; no communication with anyone during the contest; clarifications only via the #clarification-requests channel on the AICC Discord server.
- Format
- AICC Round 2, online on Kaggle, 28 Dec 2025 09:00 UTC – 30 Dec 2025 09:00 UTC.