Free Monosynth For iPad – Core Synth HD

Core Synth HD

Jasmine Lee has released a free monosynth for the iPad – Core Synth HD.

While it’s free and has a lot of features – no mention is made of MIDI support, at this time.


  • Pitch Wheel
  • 2 Octave keyboard
  • Keys light up in different colors when pressed
  • Oscillator Module
    • Dual overlapping oscillators
    • Four wave patterns: Square, Triangle, Sawtooth and Reverse Sawtooth
    • Select from 5 octaves
    • Adjust glide between notes
    • Fine tune Oscillator 2 with option to sync with Oscillator 1
  • Volume Envelope Shaper
    • Edit ADSR (Attack, Decay, Sustain, Release)
    • Low Pass Filter Module
    • Adjust Cutoff and Resonance
    • Edit ADSR (Attack, Decay, Sustain, Release)
  • Upgrade to the full version within the app for the following additional features:
    • 7 Octave Keyboard
    • Octave control to move along entire range
    • Modulation Wheel
  • Patches Module
    • Save an unlimited number of individually named patches
    • Browse through your collection before applying patch
    • Delete unwanted patches
  • Modulation Module
    • Four wave patterns: Square, Triangle, Sawtooth and Reverse Sawtooth
    • Modulate Filter, Pitch or Wave
    • Adjust LFO Rate and amount
  • Arpeggiator Module
    • Arpeggio moves up to 5 octaves
    • Four step modes: Up, Down, Up/Down, Random
    • Adjust rate

Core Synth HD includes open source code from MobileSynth, developed by Allen Porter.

2 thoughts on “Free Monosynth For iPad – Core Synth HD

  1. The full version is available as an In-App purchase. I didn't buy it.

    No Midi support whatsoever (neither in nor out). The knobs respond to circular motion, which is something that I don't like at all. Osc 2 can by synchronized to Osc 1, but this is not very useful as long as you can't modulate the pitch of Osc 2. There is some ugly noise whenever one of the envelopes reaches zero. The filter does not self-oscillate at maximum resonance. "Zap" sound is still possible. No envelope amount setting for the filter (seems to be always at maximum always).

    It's free alright, but unfortunately, that's about all that is to be said about this app.

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