S4 Rhythm Compser Pro

S4 Rhythm Compser Pro
A customizable beatbox.
You can customize the drum kits for your own by importing music from music lists such as iPod Library.
Available on the App Store
ReleasedOct 13, 2014
Size30.3 MB
RequirementsRequires iOS 7.0 or later. Compatible with iPad.


Version information

Version 1.3

  • iOS8 Support.
  • Added the ability Inter-App Audio.

Version 1.2

  • A few bugs have also been addressed.(about Audiobus).

Version 1.1

  • Added the ability to Virtual-MIDI.
  • Fixed the audio samples.
  • Improved the audio engine.

Version 1.1 has problem that can not use audiobus functions.


S4 Rhythm Composer Pro S4 Rhythm Composer Pro S4 Rhythm Composer Pro S4 Rhythm Composer Pro S4 Rhythm Composer Pro

S4 Rhythm Composer Pro is a beatbox that can be customized in various ways.
14 drum kits are preset, and also you can create and save the entire kit as “User kits” at your choice.

This app has various real-time effects.
This allows you not only to play a created pattern (song), but also to play music, controlling various effects in real time.


  • PCM Sound (Number of parts: 10)
  • 14 preset drum kits
  • Tempo: 30-300BPM, Tap tempo, Swing function
  • Step Sequencer (16 steps/32 steps)
  • Song function (Maximum 300-bar)
  • Tone editing (Name, Volume, Panning, Mute Group, Tune, Dynamic Processor, Wave Trimming, Attack/Decay Time)
  • Audio Import (AudioCopy, iPod Library, File)
  • Audio Export
  • Real-time recording
  • Various Master Effects (Distortion, Dynamic Processor, Delay, Reverb)
  • Control in real time, assigning the effect parameters to the FX XY Pad
  • Real-time Effects (Slicer, LPF, Glitch, and Roller)
  • WIST (Wireless Sync-Start Technology) is supported
  • Audiobus (Input) is supported
  • CoreMIDI (Input) is supported
  • AudioCopy/Paste is supported
  • Playing in the background is supported

S4 Rhythm Composer Pro is a dedicated iPad app. Not available on iPhone or iPod Touch.


This app is compatible with Core MIDI; you can play and control with your external USB MIDI device connected to Apple iPad Camera Connection Kit.

Precaution for Use

USB MIDI devices are connected via Apple iPad Camera Connection Kit (sold separately).
A self-power USB hub may be required for connecting USB MIDI devices with high power consumption.
Set various MIDI settings at your USB MIDI device.

read more -> S4 Rhythm Composer Pro MIDI.pdf