======================================================================
                   TRAIN / TEST SPLIT STATISTICS
======================================================================
Total Subjects: 164
Train Set:      114 (69.5%)
Test Set:        50 (30.5%)

Notes:
- Stratified sampling applied to balance instrument groups.
- Subjects without mapping ('NM' default) and specific outliers
  (e.g., Composer) were explicitly dropped as per latest filtering.

------------------------------------------------------------------------
| Instrument Group | Train | Train % | Test | Test % | Total | Total % |
------------------------------------------------------------------------
| Drums            |    9  |    7.9% |    5 |  10.0% |    14 |    8.5% |
| Guitars          |   22  |   19.3% |   10 |  20.0% |    32 |   19.5% |
| Keyboards        |   18  |   15.8% |    8 |  16.0% |    26 |   15.9% |
| NM (Non-Musician)|   22  |   19.3% |    9 |  18.0% |    31 |   18.9% |
| Strings          |    8  |    7.0% |    4 |   8.0% |    12 |    7.3% |
| Vocal            |    8  |    7.0% |    3 |   6.0% |    11 |    6.7% |
| Wind             |   27  |   23.7% |   11 |  22.0% |    38 |   23.2% |
------------------------------------------------------------------------
| TOTAL            |  114  |  100.0% |   50 | 100.0% |   164 |  100.0% |
========================================================================
