Update README.md

README.md

@@ -21,6 +21,7 @@ task_ids:
   - [Dataset Structure](#dataset-structure)
     - [Data Instances](#data-instances)
     - [Data Fields](#data-fields)
+    - [Data Splits](#data-splits)
 
 ## Dataset Description
 
@@ -63,4 +64,13 @@ NOTE_OFF: End of musical note specifying its MIDI note number
 
 ### Data Fields
 
-- `text`: Sequence of tokens that represent the guitar piece as explained in the paper [MMM: Exploring Conditional Multi-Track Music Generation with the Transformer](https://arxiv.org/abs/2008.06048).
+- `text`: Sequence of tokens that represent the guitar piece as explained in the paper [MMM: Exploring Conditional Multi-Track Music Generation with the Transformer](https://arxiv.org/abs/2008.06048).
+
+### Data Splits
+
+There are, at this moment, 395 MIDI guitar files in the Mutopia Project. I removed files of pieces that were not music for soloist guitar. After this removal, there were 372 MIDI files.
+
+I used an 80/20 split and augmented the training dataset by transposing the piece 1 octave above and below (24 semitones). The final result is then:
+
+**Train dataset:** 7325 pieces
+**Test dataset:** 74 pieces