diff --git a/packages/core/util.mjs b/packages/core/util.mjs
index c2b1fcdb..695eaacf 100644
--- a/packages/core/util.mjs
+++ b/packages/core/util.mjs
@@ -11,7 +11,7 @@ export const tokenizeNote = (note) => {
   if (typeof note !== 'string') {
     return [];
   }
-  const [pc, acc = '', oct] = note.match(/^([a-gA-G])([#bsf]*)([0-9])?$/)?.slice(1) || [];
+  const [pc, acc = '', oct] = note.match(/^([a-gA-G])([#bsf]*)([0-9]*)$/)?.slice(1) || [];
   if (!pc) {
     return [];
   }
diff --git a/packages/tonal/test/tonleiter.test.mjs b/packages/tonal/test/tonleiter.test.mjs
index ecced7e7..6c28f37a 100644
--- a/packages/tonal/test/tonleiter.test.mjs
+++ b/packages/tonal/test/tonleiter.test.mjs
@@ -88,7 +88,7 @@ describe('tonleiter', () => {
     expect(note2oct('C5')).toBe(5);
     expect(note2oct('Bb3')).toBe(3);
     expect(note2oct('C7')).toBe(7);
-    //expect(note2oct('C10')).toBe(10); // <- 2 digits fail
+    expect(note2oct('C10')).toBe(10);
   });
   test('midi2note', () => {
     expect(midi2note(60)).toBe('C4');
diff --git a/packages/tonal/tonleiter.mjs b/packages/tonal/tonleiter.mjs
index d491a2d9..56c3e35b 100644
--- a/packages/tonal/tonleiter.mjs
+++ b/packages/tonal/tonleiter.mjs
@@ -1,4 +1,4 @@
-import { isNote, isNoteWithOctave, _mod, noteToMidi } from '@strudel.cycles/core';
+import { isNote, isNoteWithOctave, _mod, noteToMidi, tokenizeNote } from '@strudel.cycles/core';
 import { Interval } from '@tonaljs/tonal';
 
 // https://codesandbox.io/s/stateless-voicings-g2tmz0?file=/src/lib.js:0-2515
@@ -28,7 +28,7 @@ export function tokenizeChord(chord) {
   return match.slice(1);
 }
 export const note2pc = (note) => note.match(/^[A-G][#b]?/i)[0];
-export const note2oct = (note) => Number(note.slice(-1));
+export const note2oct = (note) => tokenizeNote(note)[2];
 
 export const note2chroma = (note) => {
   return pc2chroma(note2pc(note));
diff --git a/test/__snapshots__/tunes.test.mjs.snap b/test/__snapshots__/tunes.test.mjs.snap
index 3c072ca2..3bf945e6 100644
--- a/test/__snapshots__/tunes.test.mjs.snap
+++ b/test/__snapshots__/tunes.test.mjs.snap
@@ -1,4 +1,4 @@
-// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+// Vitest Snapshot v1
 
 exports[`renders tunes > tune: amensister 1`] = `
 [