Shape is a polyphonic synthesiser allowing the user to draw the shape of the oscillator waveform. The positive side of the oscillator is represented by 32 blocks and the negative side is its mirror, generating all sorts of possible raw retroish sounds. Add effects like arpeggio, stereo delay and a resonant filter and record your sounds on a classic tape. Connect to other apps with audiobus, inter app audio and midi.

+++ 16 voice polyphony.
+++ Shape 2 oscillators with ADSR.
+++ 2 lfo modulation with ADSR (envelope, pitch or duty cycle).
+++ 3 oscillator mixing functions (add, subtract or multiply).
+++ Record on tape with infinite overdubs (save, load, import, export).
+++ Arpeggiator.
+++ Stereo delay.
+++ Resonant filter (low, band and high pass).
+++ Accelerometer parameter controller (Sphero).
+++ Mini linear sequencer with euclidean rhythm.
+++ Save/load synth parameter state.
+++ On screen 25 key stylophone style keyboard.
+++ AudioBus (
+++ Inter app audio.
+++ Ableton link.
+++ CoreMIDI and iaa midi.
+++ Akai synthstation 25 compatible.
+++ MAPI audio copy.
+++ Soundcloud upload.

Support for Akai Pro's SynthStation25 keyboard controller is included. SynthStation25 delivers instant hardware control for improved performance capability and expression. For more information on SynthStation25, visit

What's New

Version 4.1.6

+++ Minor tweaks to adsr and lfo wave control.

Ratings and Reviews

Minimal, Beautiful, Essential


Start of with a simple waveform
Add some colour
Rich deep ocean of sound generated
Add it to your host e.g. Aum, Modstep - Voila!!


Jobby jabber

There are more immersive and professional synth apps out there, but for £1.50 you've got a new and fun way to play your Synthstation - you can't say fairer than that so it's 5 stars.
I really like this developer, he makes innovative and diverting apps that look really cool and work on my Synthstation.
Keep them coming!

CoreMidi Awesome!


Thank you so much for adding CoreMidi support! This is great on my iPad connected to my TE OP-1. I love the way this app sounds. Gonna be using this a lot from now on.


erik sigth
8.3 MB
Requires iOS 7.0 or later. Compatible with iPhone, iPad and iPod touch.
Age Rating
Rated 4+
© Erik Sigth


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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