iPhone Screenshots


This application is a setup utility for the Fostex AR-4i.
This application enables you to edit various parameters on the AR-4i.

[Editable Parameters]
1, Menu mode (Preset/Advanced)
2, Panning on each input
3, Headphone out monitor setting
4, Limiter (enabled only with Advanced mode)
5, Low cut filter (enabled only with Advanced mode)

Also you can update the firmware on the AR-4i with this application.

What’s New

Version 1.1.4

Version 1.1.4
- Fixed the noise problem

Version 1.1.3
- Fixed compatibility problems with iOS6
- Reduced power consumption on AR-4i

Version 1.1.2
- Fixed the noise problem in video recording

Version 1.1.1
- AR-4i firmware update
- Added Input Attenuator
- Increased Headphone output level and added the control for max output setting
- Change of the parameters on Limiter and Low Cut Filter

Ratings and Reviews

3.0 out of 5
2 Ratings

2 Ratings

Superpowter77 ,

Not ready for prime time

There are currently some constant glitches with line source recording from motif xf6 with Avalon u5 to fostex ar-4i input 1. The fire app keeps doing a great job updating constantly for better functionality. We need fostex to address this issue and release a firmware ASAP. Tested with iPod touch 4g with IOS5 and rode nt2 and at 2050 mics. Other sources tested include korg pa800 with balanced outputs and Yamaha psr-s910 with Maudio dmp3 preamp

Mdurwin ,

No fix for noise

I got the AR-4i for Christmas. Better quality audio is key for my upcoming movie project. Unfortunately the device is incredibly noisy. I've installed this latest version of the app, ran through all of the setting variations, I even bought an SGM-2 shotgun mic, but whether a mic is plugged in or not, the device itself lays down a nice frosty layer of hiss.
Wasted money for the device.

Rkazantsev ,

Used at MacWorld

Used the AR-4i hardware & software at the iPhone Film Festival event at MacWorld | iWorld 2012 with great results. Amazing product, a must have if you record video interviews.


Foster Electric Co., Ltd.
250.2 KB

Requires iOS 4.3 or later. Compatible with iPhone, iPad, and iPod touch.


English, Japanese

Age Rating
Rated 4+
© 2011 Fostex Company


  • Family Sharing

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

More By This Developer

You May Also Like