Added 1976-07-30 00:54:41
App Freshness



Post Date:
2017-09-20 12:54:41

Download GravSynth »

GravSynth is a new musical instrument which allows users of any skill level to have a fan of playing.

Touch the GravSynth and titling your iPhone, or iPod Touch, you can play a variety of phrases intuitively.

GravSynth features an analog synthesizer. You can play on music like techno, house, hiphop and so on.

Ver1.1 is out now.
1) High visibility keyboard.
2) Adding an info of sound to the arpeggiator pads.
3) Adding Tutorial Movies Link.

Though ways to enjoy GravSynth are unlimited, major usages are as follows.

(1) Adding line played by GravSynth to your bands or music you composed.

(2) Playing together with your favorite track, or DJ play.

(3) Playing together with your friends having other iPhone or iPod Touch music apps.

I hope you to enjoy it various ways.

List of tracks easy to entry are as follows. You will find how you can enjoy playing GravSynth with these tracks together.

Daft Punk – One More Time : key = D BPM = 123
The Chemical Brothers – Star Guitar : key = C BPM = 125
Miles Davis – so what : key = C & key = Db BPM = 140

See demo movie on YouTube also. Search it with “gravsynth” and “demo” as keywords.

1) Analog Synthesizer can be played by your finger going over right side of surface. Volume is changed by going left and right, while pitch is changed by going up and down.

2) Derivative phrase, created from current scale, is repeated by tapping 8 pads on the left. Phrase is automatically changed by tilting body of iPhone or iPod Touch. It plays stable phrase by keep the face up. Or it plays high-tension phrase by keeping the face sideways.

3) Tilt it left and it speeds up, while it speeds down on tilting right.

You can change the key by tapping keyboards beneath.

See tutorial movie on YouTube also. Search it with “gravsynth” and “tutorial” as keywords.

It shows setting menu by tapping upper left corner. You can adjust tempo and tone of analog synthesizer.

—Setting menu—

・Oscilator1 & 2
・MODULATION (Filter Pitch Wave)
・Volume Envelope
・Filter (CutOff Resonanse)
・Envelope Filter

Musical Theory Supervisor:
Daisuke Fujiwara aka.quartz head
Professional Musician, Tenor Saxophone Player, Lydian Chromatic Concept Instructor

GravSynth includes open source code from MobileSynth ( )acording to Apache License,Version 2.0 developed by MR. Allen Porter.

We thank for this contribution.


  • GravSynth Screenshot
  • GravSynth Screenshot

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