Midiflow Motion (Audiobus) vs Seyfert
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Midiflow Motion (Audiobus)
Control effect parameters in other music apps by moving your device. Fine-tune MIDI commands like volume or modulation to your desired motion range for expressive control. Supports multiple parameters and apps simultaneously through Audiobus 3.
- Control effect parameters with device motion
- Use device rotation (X/Y axis)
- Adjust motion and output value ranges
- Send any MIDI command (pitch-bend, CC, custom)
- Control multiple parameters/apps simultaneously
- Integrates with Audiobus 3
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This MIDI sender app for Audiobus 3 lets you control effect parameters of other apps – in a way that no touch screen can replace – by moving the device. Set any kind of MIDI command like volume or modulation as output and fine-tune it to the exact motion range you want to perform with. You can even control multiple effects simultaneously. + Use device rotation around the X or Y axis + Adjust the range of motion for controlling a parameter + Adjust the range of output values + Send virtually any MIDI command (e.g. pitch-bend, any Control Change like modulation or expression, and even custom MIDI messages) + Control multiple parameters and/or multiple apps at the same time by inserting this app multiple times in Audiobus NOTE: This app requires Audiobus 3. Insert it into one or more MIDI sender ports to control the synth apps in the MIDI output ports of the respective pipelines. THE IPAD IS YOUR CONTROLLER Without a doubt, the iPad's touch screen is a revolutionary tool for musicians. However, it also comes with sensors that can track how you move your device around two axes. Using those sensors to control effect parameters allows you to perform with a huge amount of expression. CONTROL ALL KINDS OF PARAMETERS Many synth apps allow you to "remotely" control their parameters via MIDI messages. For that purpose, Midiflow Motion can send virtually any MIDI command to those apps, through Audiobus. Just select from the list of available parameters and the app starts sending messages when you move the device. Not only can you use basic Control Changes for "volume" or "modulation", you can also use double-precision commands (LSB + MSB), RPN/NRPN commands or custom MIDI messages. If you want to play notes, you might want to add Midiflow Scales behind this app in the Audiobus MIDI routing in order to map the notes to a scale. ADJUST MOTION RANGE The range selector at the bottom allows you to narrow down the motion range in which you want to control the parameter. The maximum range goes from -90 to +90 degrees. Use either the slider or the learn buttons to adjust the range according to your needs. CONTROL MULTIPLE PARAMETERS You can insert Midiflow Motion in Audiobus multiple times. That way, you can send multiple MIDI commands simultaneously. Each of them can be configured independently. For example, you can control the cutoff of a synth by rotation around the x-axis, and use the y-axis for the resonance parameter. It is like an x/y-pad, but with the whole iPad as the controller. You can also control parameters of different synths at the same time.
Seyfert
This music effect plugin creates unique echoes that orbit and revolve around the listener. It offers advanced control over pitch, depth, and tone for each echo, with a built-in reverb and EQ for a rich soundscape. It functions as a standalone app or an Audio Unit for music production software.
- Orbital echo generation
- Spin and Doppler pitch-bend effects
- 3D binaural imaging
- Octave shimmer and transpose
- Per-echo tone and drive
- Echo-focused reverb and EQ
- Standalone and AUv3 support
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Seyfert is a delay unlike your others: every echo spawns at its own place in an orbit around you, and the whole constellation slowly revolves. Turn up Feedback and you don't just add repeats, you spawn more echoes into the orbit, from a single tight slap to a dense, spiralling cloud. Spin revolves the whole field around you. Doppler bends the echoes in pitch as they whirl toward and away. 3D wraps them around your head on headphones. Lift the repeats an octave into crystalline shimmer, drop them a sub-octave for weight, or detune them into a chorus. A lush reverb blooms around the echoes, never the dry signal, so your source stays clear while the repeats dissolve into space. Features: - Orbital echoes, where Feedback sets how many circle you - Spin, from a gentle drift to a full whirl - Doppler pitch-bend as the orbit turns - 3D binaural imaging for headphones - Shimmer and transpose, up or down one octave (octaves, fifths, sub-octaves) - Per-echo Trail tone, tape Wobble, and Drive - Lush reverb applied to the echoes - Full 5-band EQ on the wet signal - Orbit and Ping-Pong patterns, tempo sync - 18 factory presets, plus save your own - Standalone app and Audio Unit (AUv3) for GarageBand, AUM, Logic, and more No accounts, no tracking, no data collected. Everything stays on your device.
Screenshots
Verdict
The clearest difference is review sentiment: Seyfert at 100% against Midiflow Motion (Audiobus)'s 40%. Seyfert also leads on rating (5.0 vs 2.0) and update cadence (every 2 days vs every 11 months). Midiflow Motion (Audiobus)'s advantage is iOS requirement (10.2 vs 15.0). On price, ads, in-app purchases and monetization model 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
Midiflow Motion (Audiobus) costs $1.99 and Seyfert $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Seyfert holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 40% of Midiflow Motion (Audiobus)'s written reviews are positive against 100% of Seyfert's.
Midiflow Motion (Audiobus) ships an update every 11 months, Seyfert every 2 days. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.
| Parameter | Midiflow Motion (Audiobus) | Seyfert |
|---|---|---|
| Price | $1.99 | $1.99 |
| Rating | 2.0 (1 ratings) | 5.0 (3 ratings) — better |
| Positive reviews | 40.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 11 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #193 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.2 — better | 15.0 |
| Further details — not scored | ||
| Size | 5 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Johannes Doerr | Konstantin Torsten Schutz |
Customer experience
Midiflow Motion (Audiobus)
Seyfert
In-app purchases
Midiflow Motion (Audiobus)
No in-app purchases
Seyfert
No in-app purchases
Questions
Is Midiflow Motion (Audiobus) free?
Is Seyfert free?
Which has better reviews, Midiflow Motion (Audiobus) or Seyfert?
Do Midiflow Motion (Audiobus) or Seyfert have ads?
Which is updated more often, Midiflow Motion (Audiobus) or Seyfert?
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