Sinusoid is an 8-bit inspired tracker/sequencer sound toy. It has 4 channels where 3 play tones and 1 plays drums or noise. There are per channel global sound settings for attack, decay, wave shapes (sine, square, triangle and pulse), tremolo, resonant filter, arpeggio, delay and bit crush. Individual note settings can control note pitch, volume, stereo pan, envelope speed and pitch glide. Input notes with external keyboard, connect to other apps with audiobus or inter app audio and export compositions to email, audio copy or soundcloud.

+++ 4 channels
+++ sinusoid, square, triangle, pulse, drums and noise
+++ resonant filter
+++ arpeggio
+++ delay
+++ bit crush
+++ stereo pan
+++ pitch glide
+++ audiobus
+++ inter app audio
+++ core midi
+++ song export

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 3.8.4

+++ Fixing midi crash bug on 64 bit devices.

Ratings and Reviews

5.0 out of 5
1 Rating

1 Rating

hemanthesmart ,


I don't normally comment but this guy looks like an aspiring developer of synth apps which is what I want to do. I just wrote my first electronica tune with this app. Great job :D the interface is reminiscent of early trackers but it is deceptively powerful. Only things to add would be an export by email option, and my iPod touch 4G added a tad bit of static to the exported file, but amazing job. Buying shape synth on impulse due to the quality of this app. :)

HtoTheRescue ,

A Fun little app

This is a fun little app, and I like it.

For the most part it works great, but when recording with the play head, it doesn't matter what octave you're set to, it always snaps back to 0 when it plays through. The only way to get anything above or below is to toggle to "note at", (unless there's a setting I can't find). Because of this, it would be good if there were some way to change the octave of a note after it's been placed.

Also, when you flip it into arpeggio mode, tapping on the the options doesn't always work. It's a little wonkey, you have to be really fast and snappy with your selections. Other than these problems, it's a cool 8-bit music app.

I tried to contact the developer to let him know instead of writing a review, but this is the only way I could find that he may read it. Providing an email for stuff like this would be a helpful thing to do too. If you do read, this and work on changing it, thanks in advance, Erik! If this stuff does gets fixed, I'll change my review to 5 stars!

Holgafan120 ,

great app

I've been using it for awhile now, and just wanted to say that it is a great little app with a fun, quirky sound, great interface design, easy to use controls with all the right features, and works great with Audiobus.

I especially like that the tracker shows my notes - really helps me double Sinusoid's utility, using him to write down my music to perform later in another app.

I like Sinusoid. He's a real trooper.


erik sigth
7.2 MB

Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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