diff --git a/tools/seq_model_perkons.py b/tools/seq_model_perkons.py
index f0b8564..c363362 100755
--- a/tools/seq_model_perkons.py
+++ b/tools/seq_model_perkons.py
@@ -13,15 +13,14 @@ note_threepos_count = 3
 note_threepos_bits = 2
 note_accent_bits = 1
 note_ratchet_bits = 3
-note_odd_bits = 4
-note_prob_bits = 3
+note_oddprob_bits = 4
 
 bars = 1
 channels = 4
 
 
 cc_bits_per_pulse = cc_count * cc_bits
-note_bits_per_pulse = (note_threepos_count * note_threepos_bits) + (note_trigger_bits) + note_ratchet_bits + note_odd_bits + note_prob_bits
+note_bits_per_pulse = (note_threepos_count * note_threepos_bits) + (note_trigger_bits) + note_ratchet_bits + note_oddprob_bits
 
 cc_bytes_per_quarter = cc_bits_per_pulse / 8 * ppq_cc
 note_bytes_per_quarter = note_bits_per_pulse / 8 * ppq_note