shapesynth

shapesynth

by Erik Sigth

24 ratings
35 reviews
$4.99

Details

  • Released
  • Updated
  • May 2, 2011
  • June 26, 2026
shapesynth screenshot #1 for iPhone
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shapesynth screenshot #5 for iPhone
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About

Create unique retro-inspired sounds by drawing oscillator waveforms. This polyphonic synthesizer offers extensive modulation options, built-in effects, and recording capabilities. Seamlessly integrate with other music apps and hardware for a versatile creative experience.

Draw custom oscillator waveforms
16-voice polyphony
Arpeggiator and stereo delay
Resonant filter
Parameter modulation via keyboard, MPE, accelerometer
Tape recorder with infinite overdubs
Inter-app audio and AUv3 support
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What's New in shapesynth

4.2.13

June 26, 2026

+++ Fixing issue with preset menu scrolling to the top on open, in iOS 26 and iPadOS 26

User reviews

Legendary Dev

a legendary dev who created legendary gameboy homebrewz

Disappointed

Was expecting to get evolving SoundScapes. Instead, all the app seems to produce is variations on a theme.

Nice Update and now AU!

Glad to see this go AU. Get all of this devs apps. They are excellent!

UPDATE 11/2018: The controls are somewhat cryptic but once you know what they do (as the on-screen hints indicate) you will find these are very cool apps.

This update makes this much more fun. Nice crazy sounds. Get it!

raw indeed!

If you're a fan of raw waveform synthesis (no filtering - raw) you will love shapesynth. You can create chip type sounds, but shapesynth is capable of far more than that.

Being able to draw waveforms is brilliant. The add, subtract, and multiply functions create some very interesting sounds as well. A very flexible sound creator.

The sequencer is unusual. Lots of fun. Brilliant.

The tape recorder function is very useful. Record the sequencer, or play in the notes with the built in keyboard directly to tape recorder. slow down or speed up the tape. tape recording can be synced to other apps!!

very good delay/echo which can be synced or unsynced.

If the grit/aliasing is too much for you ( i love it ), simply use the filter to remove.

shapesynth with a fuzz, waveshaper, distortion, overdrive function would make it untouchable, but I'm being greedy. I'll use AUM or audiobus to add that ;-)

Thank you for the great instruments humbletunes/Erik.
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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!!

Developer apps

FAQ

What is ShapeSynth?

ShapeSynth is a polyphonic synthesizer that allows users to draw the shape of their oscillator waveforms. It generates retro-style sounds and offers a wide range of features for sound design and music creation.

What are the key features of ShapeSynth?

Key features include drawing custom oscillator shapes, 16-voice polyphony, multiple oscillator mixing functions, LFO modulation, a tape recorder for recording sounds, an arpeggiator, stereo delay, a resonant filter, and extensive modulation options via keyboard, MIDI MPE, or the device's accelerometer.

How much does ShapeSynth cost?

Based on the provided information, ShapeSynth is a paid application. There are no mentions of in-app purchases or ads, indicating a one-time purchase model.

What platforms is ShapeSynth compatible with?

ShapeSynth supports integration with other apps and hardware through AudioBus, Inter App Audio (IAA), and AUv3. It also offers CoreMIDI, IAA MIDI, Bluetooth MIDI, and limited MPE and MIDI out capabilities.

What are some common use cases for ShapeSynth?

Common use cases include creating unique retro-inspired synth sounds, designing custom oscillator waveforms, composing electronic music, experimenting with sound design, and integrating the synthesizer into existing digital audio workstations (DAWs) or mobile music setups.