Compare MIDI1 and MIDI2 ablations

Removes the unavailable-response note, adds MIDI1 results for all four models, and briefly explains the named-pitch versus numeric-pitch ablation.

README.md

@@ -43,16 +43,21 @@ three externally hosted BSED recordings.
 
 ## Ablation
 
-The `ablation` configuration reports the MIDI2 baseline on four non-overlapping
-subsets. GPT-5.6-sol uses the full 106-question P denominator; its one
-unavailable response is counted as incorrect.
-
-| Model | P | General (S/P) | Tonality/style (S/P) | Composer/title (S/P) | Overall |
-|---|---:|---:|---:|---:|---:|
-| GPT-5.6-sol | 34/106 (32.08%) | 11/36 (30.56%) | 25/48 (52.08%) | 0/48 (0.00%) | 70/238 (29.41%) |
-| MuseSpark 1.2 | 28/106 (26.42%) | 11/36 (30.56%) | 32/48 (66.67%) | 11/48 (22.92%) | 82/238 (34.45%) |
-| Qwen3.5-Omni-Plus | 9/106 (8.49%) | 3/36 (8.33%) | 9/48 (18.75%) | 0/48 (0.00%) | 21/238 (8.82%) |
-| Qwen3.6-Plus | 4/106 (3.77%) | 1/36 (2.78%) | 9/48 (18.75%) | 0/48 (0.00%) | 14/238 (5.88%) |
+The `ablation` configuration compares MIDI1, which uses named pitches, with
+MIDI2, which replaces them with numeric MIDI note values. The numeric encoding
+substantially reduces overall accuracy for GPT-5.6-sol (55.88% to 29.41%) and
+both Qwen models, while MuseSpark remains at 34.45%.
+
+| Representation | Model | P | General (S/P) | Tonality/style (S/P) | Composer/title (S/P) | Overall |
+|---|---|---:|---:|---:|---:|---:|
+| MIDI1 | GPT-5.6-sol | 63/106 (59.43%) | 18/36 (50.00%) | 37/48 (77.08%) | 15/48 (31.25%) | 133/238 (55.88%) |
+| MIDI1 | MuseSpark 1.2 | 28/106 (26.42%) | 11/36 (30.56%) | 32/48 (66.67%) | 11/48 (22.92%) | 82/238 (34.45%) |
+| MIDI1 | Qwen3.5-Omni-Plus | 12/106 (11.32%) | 5/36 (13.89%) | 19/48 (39.58%) | 0/48 (0.00%) | 36/238 (15.13%) |
+| MIDI1 | Qwen3.6-Plus | 11/106 (10.38%) | 4/36 (11.11%) | 17/48 (35.42%) | 0/48 (0.00%) | 32/238 (13.45%) |
+| MIDI2 | GPT-5.6-sol | 34/106 (32.08%) | 11/36 (30.56%) | 25/48 (52.08%) | 0/48 (0.00%) | 70/238 (29.41%) |
+| MIDI2 | MuseSpark 1.2 | 28/106 (26.42%) | 11/36 (30.56%) | 32/48 (66.67%) | 11/48 (22.92%) | 82/238 (34.45%) |
+| MIDI2 | Qwen3.5-Omni-Plus | 9/106 (8.49%) | 3/36 (8.33%) | 9/48 (18.75%) | 0/48 (0.00%) | 21/238 (8.82%) |
+| MIDI2 | Qwen3.6-Plus | 4/106 (3.77%) | 1/36 (2.78%) | 9/48 (18.75%) | 0/48 (0.00%) | 14/238 (5.88%) |
 
 ## IDs and ordering
 

data/ablation.csv

@@ -1,5 +1,9 @@
-model,p_correct,p_total,p_accuracy_percent,general_correct,general_total,general_accuracy_percent,tonality_style_correct,tonality_style_total,tonality_style_accuracy_percent,composer_title_correct,composer_title_total,composer_title_accuracy_percent,overall_correct,overall_total,overall_accuracy_percent
-openai/gpt-5.6-sol,34,106,32.08,11,36,30.56,25,48,52.08,0,48,0.0,70,238,29.41
-meta/muse-spark-1.2,28,106,26.42,11,36,30.56,32,48,66.67,11,48,22.92,82,238,34.45
-qwen3.5-omni-plus,9,106,8.49,3,36,8.33,9,48,18.75,0,48,0.0,21,238,8.82
-qwen/qwen3.6-plus,4,106,3.77,1,36,2.78,9,48,18.75,0,48,0.0,14,238,5.88
+representation,model,p_correct,p_total,p_accuracy_percent,general_correct,general_total,general_accuracy_percent,tonality_style_correct,tonality_style_total,tonality_style_accuracy_percent,composer_title_correct,composer_title_total,composer_title_accuracy_percent,overall_correct,overall_total,overall_accuracy_percent
+MIDI1,openai/gpt-5.6-sol,63,106,59.43,18,36,50.0,37,48,77.08,15,48,31.25,133,238,55.88
+MIDI1,meta/muse-spark-1.2,28,106,26.42,11,36,30.56,32,48,66.67,11,48,22.92,82,238,34.45
+MIDI1,qwen3.5-omni-plus,12,106,11.32,5,36,13.89,19,48,39.58,0,48,0.0,36,238,15.13
+MIDI1,qwen/qwen3.6-plus,11,106,10.38,4,36,11.11,17,48,35.42,0,48,0.0,32,238,13.45
+MIDI2,openai/gpt-5.6-sol,34,106,32.08,11,36,30.56,25,48,52.08,0,48,0.0,70,238,29.41
+MIDI2,meta/muse-spark-1.2,28,106,26.42,11,36,30.56,32,48,66.67,11,48,22.92,82,238,34.45
+MIDI2,qwen3.5-omni-plus,9,106,8.49,3,36,8.33,9,48,18.75,0,48,0.0,21,238,8.82
+MIDI2,qwen/qwen3.6-plus,4,106,3.77,1,36,2.78,9,48,18.75,0,48,0.0,14,238,5.88