The big brother to Crystal Synth has arrived. Here’s what to expect:

Crystal XT is a full featured semi-modular synthesizer, ideally suited to creating lush evolving soundscapes. Crystal VST has long been a popular synthesizer on the desktop. Crystal XT brings that same powerful synthesis engine to the iPad and iPhone. Crystal XT features MIDI keyboard input via the iPad’s camera adapter and sharing of sounds with the desktop version of Crystal.

Browse through the included sounds and use the 1 octave keypad to trigger notes to produce evolving, rhythmic, or melodic sounds. Create your own sounds with a single button press using the breed feature. When using an iPad, you can delve into a tweaker’s dream by using the extensive editing features to sculpt sounds to your heart’s content.

Crystal features both subtractive synthesis and frequency modulation (FM) synthesis. It offers abundant modulation control with over 90 parameters which may be modulated, multi-stage envelopes with graphical editors, extensive tempo sync of envelopes/lfo rates/delay times, built-in effects for chorus/flanging/comb filtering/echoes, and a band splitter for effects processing by frequency band. Not only that, Crystal has wave sequencing and granular synthesis. The musical applications for Crystal are literally boundless.

With MIDI keyboard input, you can connect a MIDI keyboard to your iPad and play Crystal XT like a hardware synth.

With patch sharing you can create sounds on your iPad or iPhone while away from the studio, then transfer them to the desktop Crystal when you get back to the studio to use in recording projects. Or, create banks of sounds on the desktop Crystal, then transfer them to the iPad/iPhone Crystal to use in a live performance for a truly portable rig.

If you don’t need all the features of Crystal XT, try the basic version of Crystal, also available in the app store from Green Oak Software. With the basic version you can browse sounds, play notes, and create new sounds, taking advantage of its powerful semimodular synthesis engine. Crystal XT adds MIDI keyboard input via the iPad’s camera adapter and sharing of patches with the desktop version. Choose the app that is best for you!

Important note for iPhone and iPodTouch users: Crystal XT runs on both the iPad and the iPhone/iPod Touch. Because of the limited screen space on the iPhone however, the editing pages, which contain the edit controls, are not available when running on that device. But on the iPhone you can still browse sounds, play notes from the keypad, create new sounds with the Breed feature, and share sounds with desktop Crystal VST. (Note: MIDI input requires an iPad. Apple’s camera adapter is not supported on the iPhone/iPod Touch).

Crystal Synth XT is priced at $4.99.

Crystal Synth XT - Green Oak Software Clip to Evernote



  1. @Darksound

    Thanks for the info on the controller.

    I've been using the Crystal VST for years, it is a beast no less 🙂

  2. So, no editing controls for iPhone and iPod Touch users because…they wouldn't fit on the screen ?


    That makes me wonder how the developers of the fifty or so music applications I already own did it…

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