StreamByter vs GSDSP MMMm
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StreamByter
Create custom MIDI effects with or without a graphical interface. This plugin extends MIDI processing for AU hosts or can be used standalone with CoreMIDI. It offers advanced programming concepts for complex MIDI manipulation.
- Custom MIDI effect creation
- AU effect or standalone CoreMIDI use
- Remap, filter, clone, and delay MIDI events
- Conditional logic and loops for complex effects
- Bi-directional linking with graphical sliders
- Textual rules language for configuration
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StreamByter is a plugin for creating custom MIDI effects with or without a GUI. It can be used as an Apple Audio Unit (AU) effect or as a standalone app connected via CoreMIDI virtual ports. StreamByter is ported from our acclaimed MidiFire MIDI processing environment. An iOS device (minimum iOS 11) and a suitable AU host app such as AUM, apeMatrix, Cubasis or Sequencism is required to use the AU variant. To use with CoreMIDI, a routing app like MidiFire is recommended and an iOS device with at least iOS 8 is required. Use StreamByter to: - Extend the MIDI processing functionality of any AU host. - Remap channels, notes, controllers (anything MIDI) - Filter MIDI events coarsely or finely - Clone or Delay any event - Send any event automatically when plugin is loaded - Create complex effects using programming concepts like conditionals, loops, variables (including array, timing and random), and math operators. - Link effect logic bi-directionally with graphical sliders (remote controllable via AU parameters) StreamByter is configured using a textual rules 'language' that defines how the effect should operate. Please see the support link to go to our website for full details. StreamByter is built using the MidiBus library - http://midib.us
GSDSP MMMm
This app provides a powerful MIDI modulation engine to control various plugins, hardware, and instruments. It offers a range of modulation sources like LFOs and random generators, and includes a dedicated performance skin for live use. It's a MIDI-only FX version for hosts requiring pure MIDI processing.
- MIDI CC control for plugins and hardware
- LFO, Random, Envelope Follower modulators
- XY pads for modulation
- Dedicated Performance Skin for live use
- AUv3 MIDI FX plugin
- Desktop versions available
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A powerful MIDI modulation engine for controlling plugins, hardware, and instruments using LFOs, random sources, macros, and audio-based modulation. Modulate Everything MMMm is a MIDI controller and modulation workstation designed to control any parameter that accepts MIDI CC — software instruments, plugins, external hardware, or any MIDI-capable device. Create modulation using LFOs, Random Generators, Envelope Followers, XY pads, and more. No more drawing of automation curves, keep your audio dynamic and exciting with ease. Perform Live MMMm includes a dedicated Performance Skin designed for low-light and stage environments. It uses a restrained, red-accented color palette that preserves focus and minimizes visual distraction while performing. The interface remains clear and readable in dark settings, ensuring stable workflow during your live performance. MMM vs MMMm MMM includes audio input, enabling Envelope Followers, audio-reactive modulation, and audio output — ideal when used as an audio plugin. MMMm, by contrast, is a MIDI-only FX version for hosts such as Logic Pro or AUM that require a pure MIDI processor. Both versions support MIDI input and output and provide the same core modulators. MMMm is an AUv3 midi effect plugin compatible with Logic Pro, AUM, Cubasis, GarageBand and many more. A Desktop version is also available for Windows and macOS (VST3 / AU / AAX). More information here: https://gs-dsp.com/products
Screenshots
Verdict
The clearest difference is update cadence: GSDSP MMMm at every 6 weeks against StreamByter's every 3 months. GSDSP MMMm also leads on review sentiment (100% vs 91%) and iOS requirement (12.0 vs 14.5). On price, rating, ratings volume and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 4.9 for StreamByter against 4.9 for GSDSP MMMm. Both are backed by a comparable volume of ratings — 27 and 14 respectively. Written reviews are what separate them: 91% of StreamByter's written reviews are positive against 100% of GSDSP MMMm's.
StreamByter ships an update every 3 months, GSDSP MMMm every 6 weeks. The most recent releases landed on October 9, 2026 and September 30, 2026 respectively.
| Parameter | StreamByter | GSDSP MMMm |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (27 ratings) — better | 4.9 (14 ratings) |
| Positive reviews | 90.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 27 — better | 14 |
| Update frequency | Every 3 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.5 | 12.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Audeonic Apps | Gustav Scholda |
Customer experience
StreamByter
GSDSP MMMm
In-app purchases
StreamByter
No in-app purchases
GSDSP MMMm
No in-app purchases









