Quartet Lab
String quartet arranging lab
USD 4.99 · Designed for iPad. Not verified for macOS.
Draw a melody and get a string quartet back. Generate arrangements, explore real repertoire, mix articulation, and export MIDI, audio, or play it as an AUv3.
Quartet Lab is a hands-on workshop for writing and arranging for string quartet: draw a melody and get a four-part arrangement back, generate one from scratch, or study real repertoire — all rendered in notation and piano roll, and played back with real string samples.
ARRANGE — Draw a Violin I melody on the piano roll and arrange it for string quartet in one tap. Choose close or open voicing, chorale/homorhythm, melody+accompaniment or drone texture, harmonic rhythm and chord vocabulary.
GENERATE — Create a complete four-part quartet from scratch in any key, major or minor, with the same voicing and texture controls.
SCORE & PIANO ROLL — Read the result as hand-drawn notation (correct clefs, including alto clef for viola) or as a piano roll — both scroll together with the playhead.
ARTICULATION — Set Arco or Pizzicato per voice from the mixer, or paint it note by note directly on the score or piano roll.
LIBRARY — Arrange J.S. Bach chorales for quartet, play real public-domain quartets by Haydn, Mozart, Beethoven, Brahms, Schubert and Schumann, or arrange public-domain and CC-licensed popular songs.
THEORY — Lessons on range, voicing, texture, idiomatic technique, parallel motion and harmony — written for string quartet, not generic music theory.
EXPORT — Export your arrangement as a Standard MIDI File or as audio (.m4a) straight from the Score screen.
AUv3 PLUG-IN — Use Quartet Lab inside GarageBand, AUM and other hosts as a tempo-synced generator that outputs quartet audio and MIDI to record in your own DAW.
NO ACCOUNT, NO ADS, NO TRACKING — Everything runs on your device.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
The developer, Martin Adler, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- Martin Adler
- Size
- 49.1 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Spanish
- Age Rating
4+
- 4+
- Copyright
- © 2026 Martin Adler
