Harmony Chack

No instrument needed to try out harmonies. Build any chord, record parts on the keyboard, then fix a note's pitch or length. For solo harmonies, string parts, sketches.

Hear the harmony that's in your head — and find out whether it actually works.

You don't need an instrument. Play it on the on-screen keyboard, stack the parts, and listen.

WHAT IT'S FOR

• Adding a harmony line to a guitar solo
• Working out how to voice a string arrangement
• Saving a chord progression before you forget it
• Thinking it through on headphones, anywhere

WHAT YOU CAN DO

Lay down chords The seven chords that fit your key are right there — tap to place one. Or build your own from a root, accidental, 7th, sus4 and tensions. Slash chords are supported. Common progressions like II-V-I and the blues can be dropped in whole.

Stack up harmonies Record straight from the on-screen keyboard, up to four harmony parts. Each part has its own color, so you can see at a glance which note belongs where. Set the volume of each part, or hide one for a moment.

Fix it afterwards Grab a recorded note and move it. Change its pitch, shorten it, delete it. No need to play the part again. Quantize to 16ths and other grids.

Check it while it plays Play along with a click, drums and chord backing. Change the tempo and time signature, and loop a fixed number of bars so you can hear the same spot over and over.

See it your way Switch between staff notation and piano roll. Zoom in horizontally for fine timing, or out vertically to see a wider range.

Keep it Save what you build as a song, name it, and reorder your list.

FREE Up to 8 bars, and two rock rhythms. Building chords, four harmony parts, recording and editing are all free.

PREMIUM (one-time purchase) Unlocks all 16 bars and adds jazz, bossa nova, samba and techno rhythms. Pay once — nothing further.

Note: the app is designed for landscape. Works on both iPhone and iPad.