diff --git a/packages/tonal/test/tonleiter.test.mjs b/packages/tonal/test/tonleiter.test.mjs
index 5cf710f8..e5d44917 100644
--- a/packages/tonal/test/tonleiter.test.mjs
+++ b/packages/tonal/test/tonleiter.test.mjs
@@ -17,7 +17,7 @@ import {
   note2oct,
   note2midi,
   midi2note,
-  voiceBelow,
+  renderVoicing,
   scaleStep,
 } from '../tonleiter.mjs';
 
@@ -56,8 +56,9 @@ describe('tonleiter', () => {
     expect(pc2chroma('D')).toBe(2);
     expect(pc2chroma('Db')).toBe(1);
     expect(pc2chroma('Dbb')).toBe(0);
-    //lowercase
-    // expect(pc2chroma('c')).toBe(0); // TODO
+    expect(pc2chroma('bb')).toBe(10);
+    expect(pc2chroma('f')).toBe(5);
+    expect(pc2chroma('c')).toBe(0);
   });
   test('rotateChroma', () => {
     expect(rotateChroma(0, 1)).toBe(1);
@@ -114,16 +115,17 @@ describe('tonleiter', () => {
     expect(scaleStep([60, 63, 67], -3)).toBe(48);
     expect(scaleStep([60, 63, 67], -4)).toBe(43);
   });
-  test('voiceBelow', () => {
+  test('renderVoicing', () => {
     const voicingDictionary = {
       m7: [
         '3 7 10 14', // b3 5 b7 9
         '10 14 15 19', // b7 9 b3 5
       ],
     };
-    expect(voiceBelow('Bb4', 'Em7', voicingDictionary)).toEqual(['G3', 'B3', 'D4', 'Gb4']);
-    expect(voiceBelow('D5', 'Cm7', voicingDictionary)).toEqual(['Eb4', 'G4', 'Bb4', 'D5']);
-    expect(voiceBelow('G5', 'Cm7', voicingDictionary)).toEqual(['Bb4', 'D5', 'Eb5', 'G5']);
+    expect(renderVoicing('Em7', 'Bb4', voicingDictionary)).toEqual(['G3', 'B3', 'D4', 'Gb4']);
+    expect(renderVoicing('Cm7', 'D5', voicingDictionary)).toEqual(['Eb4', 'G4', 'Bb4', 'D5']);
+    expect(renderVoicing('Cm7', 'G5', voicingDictionary)).toEqual(['Bb4', 'D5', 'Eb5', 'G5']);
+    expect(renderVoicing('Cm7', 'g5', voicingDictionary)).toEqual(['Bb4', 'D5', 'Eb5', 'G5']);
     // expect(voiceBelow('G4', 'Cm7', voicingDictionary)).toEqual(['Bb3', 'D4', 'Eb4', 'G4']);
     // TODO: test with offset
   });
diff --git a/packages/tonal/tonleiter.mjs b/packages/tonal/tonleiter.mjs
index d2be75ca..ee5a4d16 100644
--- a/packages/tonal/tonleiter.mjs
+++ b/packages/tonal/tonleiter.mjs
@@ -1,14 +1,16 @@
 import { isNote, isNoteWithOctave, _mod } from '@strudel.cycles/core';
+import { Interval } from '@tonaljs/tonal';
 
 // https://codesandbox.io/s/stateless-voicings-g2tmz0?file=/src/lib.js:0-2515
 
 const flats = ['C', 'Db', 'D', 'Eb', 'E', 'F', 'Gb', 'G', 'Ab', 'A', 'Bb', 'B'];
+const pcs = ['c', 'db', 'd', 'eb', 'e', 'f', 'gb', 'g', 'ab', 'a', 'bb', 'b'];
 const sharps = ['C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'A#', 'B'];
 const accs = { b: -1, '#': 1 };
 
 export const pc2chroma = (pc) => {
   const [letter, ...rest] = pc.split('');
-  return flats.indexOf(letter) + rest.reduce((sum, sign) => sum + accs[sign], 0);
+  return pcs.indexOf(letter.toLowerCase()) + rest.reduce((sum, sign) => sum + accs[sign], 0);
 };
 
 export const rotateChroma = (chroma, steps) => (chroma + steps) % 12;
@@ -54,6 +56,14 @@ export const x2chroma = (x) => {
   }
 };
 
+export const step2semitones = (x) => {
+  let num = Number(x);
+  if (!isNaN(num)) {
+    return num;
+  }
+  return Interval.semitones(x);
+};
+
 export const x2midi = (x) => {
   if (typeof x === 'number') {
     return x;
@@ -77,13 +87,13 @@ export function scaleStep(notes, offset) {
   return notes[offset % notes.length] + octOffset;
 }
 
-export function voiceBelow(maxNote, chord, voicingDictionary, offset = 0, n) {
+export function renderVoicing(chord, anchor, voicingDictionary, offset = 0, n) {
   const [root, symbol] = tokenizeChord(chord);
-  const maxPc = note2pc(maxNote);
+  const maxPc = note2pc(anchor);
   const maxChroma = pc2chroma(maxPc);
   const rootChroma = pc2chroma(root);
   const voicings = voicingDictionary[symbol].map((voicing) =>
-    typeof voicing === 'string' ? voicing.split(' ').map((n) => parseInt(n, 10)) : voicing,
+    (typeof voicing === 'string' ? voicing.split(' ') : voicing).map(step2semitones),
   );
 
   let minDistance, bestIndex;
@@ -100,7 +110,7 @@ export function voiceBelow(maxNote, chord, voicingDictionary, offset = 0, n) {
   const octDiff = Math.ceil(offset / voicings.length) * 12;
   const indexWithOffset = _mod(bestIndex + offset, voicings.length);
   const voicing = voicings[indexWithOffset];
-  const maxMidi = note2midi(maxNote);
+  const maxMidi = note2midi(anchor);
   const topMidi = maxMidi - chromaDiffs[indexWithOffset] + octDiff;
 
   const voicingMidi = voicing.map((v) => topMidi - voicing[voicing.length - 1] + v);
diff --git a/packages/tonal/voicings.mjs b/packages/tonal/voicings.mjs
index c40d7193..79722d01 100644
--- a/packages/tonal/voicings.mjs
+++ b/packages/tonal/voicings.mjs
@@ -5,7 +5,7 @@ This program is free software: you can redistribute it and/or modify it under th
 */
 
 import { stack, register } from '@strudel.cycles/core';
-import { voiceBelow, note2midi, x2midi } from './tonleiter.mjs';
+import { renderVoicing, note2midi, x2midi } from './tonleiter.mjs';
 import _voicings from 'chord-voicings';
 const { dictionaryVoicing, minTopNoteDiff } = _voicings.default || _voicings; // parcel module resolution fuckup
 
@@ -145,7 +145,7 @@ export const voicing = register('voicing', function (pat) {
       if (typeof dictionary === 'string') {
         dictionary = voicingRegistry[dictionary]?.dictionary;
       }
-      let notes = voiceBelow(anchor, chord, dictionary, offset, n);
+      let notes = renderVoicing(chord, anchor, dictionary, offset, n);
       if (mode === 'below') {
         notes = notes.filter((n) => x2midi(n) !== note2midi(anchor));
       }