Stereo Designer Mini - AudioFX 4+

Holderness Media

    • 5.0 • 2 Ratings
    • $2.99

iPhone Screenshots


Vintage iOS Stereo Shaper FX app! Originally released in 2014, Stereo Designer Mini is a powerful stereo shaping effect, with independent control per channel.

Stereo Designer Mini is an easy to use multi-purpose stereo shaping tool for Audiobus and Inter-app Audio. Create unique wide stereo image, "stereoize" a mono sound source, apply mid/side processing, independent high and low pass filters per channel, and more.

Process synths, drum machines and hundreds of other apps by connecting through Audiobus. Use Stereo Designer Mini as an effect inside DAW apps such as Garageband, Multitrack DAW, and AudioShare using Audiobus or Inter-app audio.

Stereo Designer Mini supports Core MIDI via the Camera Connection kit, USB MIDI interfaces, Virtual MIDI and WiFi connections. The MIDI Learn function lets you easily assign your MIDI controller's knobs and sliders to control Stereo Designer's effect parameters.

Here's what users are saying:

" With Stereo Designer, Christopher has created one of the most impressive/creative stereo enhancement processors I’ve ever had the pleasure to use. If there was a VST/AU version for the desktop then I’d buy it in a heartbeat…."
- Music App Blog ( 

"Add depth to your sounds -
This can help add a missing dimension to your music. Try running a synth or drum app through it. Use an audio interface to process guitars, hardware synths, or even a signal from your desktop DAW. It works really well with the developer’s other apps too. Great with Audiobus."
- dmonterroso (AppStore review)

In addition to Audiobus and Inter-app Audio support, Stereo Designer Mini can also process external instruments such as guitar, voice and synths by connecting a microphone or professional audio interface such as the Apogee Jam, ONE, or any iOS compatible USB audio interface. Guitarists can use our effects live by connecting the output of their audio interface to an amp.

For more info and video demos visit:

Check out our entire FX series including Caramel, Crystalline, Echo Pad and Swoopster!

• requires iOS 12.4 or later
• iPhone 5 or newer
• Audiobus 3 compatible (Effect, state saving)
• Inter-App audio compatible (effect node)
• Compatible with DAW apps such as Garageband and Multi-track DAW
• compatible with USB audio interfaces
• Core MIDI compatible


• Control individual Left/Right channel volume, panning, filter and more.
• Mid/Side (M/S) processing mode lets you adjust the volume, high and low pass filters for Mid and Side independently.
• Widen or reduce the stereo width of an input signal.
• Independent panning position of each channel, allowing for interesting stereo placement.
• Individual High and Low Pass filter per channel for additional stereo shaping.
• Phase (polarity) invert Left/Right channels.
• Isolate the Left or Right channel and manipulate the resulting mono signal.
• "Stereoize" mono inputs using individual channel delay + High and Low Pass filters.
• Sum Left and Right channels to mono.
• Audiobus 3 compatible with state saving
• Inter-app Audio compatible
• Core MIDI compatible, works with any MIDI controller via MIDI Learn
• Select presets via MIDI program change

Stereo Designer Mini works with just about any professional iOS compatible USB audio interfaces. Here is a list of interfaces that have been tested and verified to be compatible:

• Apogee Jam and Jam 96k
• Apogee Mic
• Apogee ONE for iPad/Mac
• Apogee DUET for iPad/Mac
• Apogee QUARTET for iPad/Mac
• iRig
• iRig HD
• iRig iMic
• Focusrite Scarlett series (*requires USB hub)
• Alesis io2
• Alesis IO Dock
• Behringer UCA202
• many more

What’s New

Version 1.1.6

• Add Bluetooth audio support.
• Various bugfixes and improvements.

Ratings and Reviews

5.0 out of 5
2 Ratings

2 Ratings

Pangoat ,

One of the best audio mastering tools yet

I mix and master a kit of audio on the iOS. Stereo designer lets you do mid/side stereo processing on your mixes. For all you who are wondering what that is basically can "widen" or "narrow" the perceived audio space of the mix. Really amazing. I can now hear guitar, bass, synths and drums all distinctly instead of my previous muddy mess. Thank you so much

ovrdrvn ,

Top Notch

I own all of Holderness Media's apps. They are high quality and work well with other apps. There are an infinite number of creative uses of these apps. I encourage everyone to try them as they are a great value.

App Privacy

The developer, Holderness Media, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

More By This Developer

Echo Pad - Delay FX Processor
Crystalline Mini - Shimmer FX
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Caramel Mini - Saturator FX
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