Logic Pro · free · Apple silicon

Audio to MIDI in Logic Pro, chords included.

Logic's own audio to MIDI goes through Flex Pitch, which Apple says works best on single lines. That suits a vocal. On a strummed guitar or a piano chord the notes come out wrong.

TONIQ is a free plug-in on your Logic track that listens to the part and writes every note of every chord, with velocity. Native on Apple silicon.

Download TONIQ free Other DAWs

Four steps in Logic.

  1. 1

    Put TONIQ on the audio track

    In the audio track's channel strip, insert TONIQ (Audio Units) in the first plug-in slot. It is an audio effect, so it listens to the track.

  2. 2

    Give it the audio

    Press Capture in TONIQ and play the region, then press TONIQ's Stop (stopping Logic does not end the capture). Or drag the audio file into TONIQ from Logic's Browser.

  3. 3

    Say what it is

    Pick Polyphonic for guitar, piano or keys, Full mix for a whole song, Melodic for a single line, Vocal or Drums. TONIQ suggests one from the sound, and you can change it.

  4. 4

    Drag the MIDI onto a software instrument track

    Every note of every chord, with velocity, at your project tempo. A full mix comes out as one MIDI file with every part; with Pro, as one MIDI track per instrument.

Flex Pitch or TONIQ: which for what.

Flex Pitch is built in and good at what it was made for. Use it for single lines; use TONIQ when there is more than one note at a time. For chord names alone, Logic 12's Chord ID reads them from audio onto the Chord Track.

The audio Logic's Flex Pitch TONIQ, free
A sung or played single lineWorks wellWorks; a vocal keeps its pitch bends in the MIDI
Guitar chords, piano, keys, padsMade for single lines; chords come out wrongEvery note of every chord
A whole songSplit it with Stem Splitter first, then one line per stemEvery part in one pass, as MIDI and audio stems (a MIDI track per instrument with Pro)
DrumsReplace or Double Drum Track, one drum per trackDrum MIDI for your own kit
Fix one note inside a chord, in the audioFlex Pitch is made for single linesTONIQ Pro, $129 once

How accurate TONIQ is, measured on public test recordings: 95.2 % note F1 on piano, 93.9 % on guitar.

Audio to MIDI in Logic: questions.

Can Logic Pro convert polyphonic audio to MIDI on its own? +
Not note for note. Logic 12's Chord ID can name the chords in an audio region and put them on the Chord Track, but it does not write the notes as MIDI. Logic's built-in audio to MIDI is Flex Pitch: "Create MIDI Track from Flex Pitch Data" turns the detected notes into MIDI. Apple's guide says it works best on monophonic material and that chords may lead to errors. TONIQ writes every note of the chord as MIDI, free.
Why is "Create MIDI Track from Flex Pitch Data" greyed out? +
Flex has to be on for the track, in Flex Pitch mode, and the region has to be selected and analysed. Show the Flex controls (Command-F), turn Flex on for the track, choose Flex Pitch, open the region in the Audio Track Editor (double-click it); the command is in that editor's Edit menu.
Does TONIQ work in Logic Pro on Apple silicon? +
Yes. TONIQ runs natively on Apple silicon, as an Audio Units plug-in and as a standalone app. Native Logic runs Audio Units outside its own process, where ARA does not work, so TONIQ works as an insert there. It also runs on Intel Macs with macOS 12 or later, in the Logic versions that run there.
Is it really free? +
Audio to MIDI is free for good, with no length limit and no watermark. Shaping the MIDI (detection, vibrato and quantize settings, MIDI per instrument) and editing the notes inside the audio (move one note of a chord, fix a sour note, change its timing, level or vibrato) is TONIQ Pro: $129 once, after a 14-day trial with no card, started when you ask for it.
Can I use Logic's Stem Splitter first? +
You can, but you do not need to. Logic's Stem Splitter separates a song into vocals, drums, bass, guitar, piano and other, and Flex Pitch then turns a single-line stem into MIDI. TONIQ's Full mix engine does the split itself and writes every part, chords included, as MIDI (with Pro, each part as its own MIDI track).
I used Samplab in Logic. What now? +
Samplab's service shut down on 17 September 2026, and its plug-in depended on Samplab's servers. TONIQ covers the audio to MIDI part for free and runs on your Mac, not on a server; the note editing is TONIQ Pro. The details are on our Samplab alternative page.

Moving from Samplab: TONIQ as a Samplab alternative. Logic Pro, Flex Pitch, Stem Splitter and Chord ID are Apple's; INSEKTIQ is not affiliated with Apple.