Comparison

Velocity Filter vs RingsFX

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Velocity Filter

This audio unit plugin enhances synthesizer patches by making them responsive to MIDI velocity. It can function as a MIDI-controlled filter or volume control, adding natural musicality to non-velocity-sensitive sounds without altering their core tone.

Highlights
  • MIDI velocity to volume/filter conversion
  • MIDI-CC and aftertouch control
  • High-shelf filter modulation
  • Preserves original patch tone
  • Batch application to patches
Features
Read full description

WHAT IS VELOCITY FILTER? Velocity Filter is the fastest way to make all your synthesizer patches respond to MIDI velocity in a natural and musical way. Just add it to your audio unit effects on the synth track and you are done! WHAT DOES IT DO? It converts non-velocity-sensitive synths sounds into velocity-sensitive ones. Velocity Filter can be configured as either a MIDI-controlled filter or a MIDI-operated volume control. In filter mode, it adds or removes high frequency energy according to the velocity of each MIDI note, so that lower velocity notes sound softer and have less high harmonic content. You can control the amount of boost or cut and the frequency range. In volume control mode, it adjusts the volume according to incoming MIDI velocity. WHAT ELSE DOES IT DO? In addition to MIDI velocity, you can also control the filter using MIDI-CC or aftertouch controls. So you can control it in a variety of ways. HOW IS THIS BETTER THAN EDITING MY SYNTH PATCHES TO MODULATE THE FILTER CUTOFF BY MIDI VELOCITY? Most synthesizers respond to velocity either by modulating the cutoff frequency of a lowpass filter or by modulating the gain. Doing velocity response that way distorts the tone of the patch in an un-musical way, especially if it uses a resonant lowpass filter. Instead of modulating the gain of a lowpass filter, Velocity Filter modulates the gain of a high-shelf filter. The sound is very different, and can be applied on top of the existing filters in the synth patch without destroying the tone of the patch. Also, if you are browsing through a collection of 1000 patches, it's much easier to apply this filter to the output than to modify each and every patch to modulate the filter cutoff with MIDI velocity. However, it's not necessarily "better"; it's just very different. Read the limitations section below for why it's not always better. WHAT LIMITATIONS DOES IT HAVE? All notes go through one filter, so if you play two notes at the same time, with different velocities, it will set the filter for the loudest of the two notes. Also, the filter takes about 1 millisecond to change from loud to soft, so if you quickly switch from loud to soft, you'll hear the filter clamping down AFTER the initial attack. This is problematic for synth patches that have near zero attack time. Velocity Filter does not support GarageBand because GarageBand does not support sending MIDI messages to audio effects. Velocity filter is an audio unit plugin ONLY. It runs inside of host apps such as AUM, Audiobus, Cubasis, Auria, and Beatmaker 3.

About

RingsFX

This music app emulates a renowned physical modeling synthesizer, offering diverse synthesis techniques and polyphonic capabilities. It allows for real-time parameter manipulation and can process external audio, creating unique sonic textures and rhythms.

Highlights
  • Physical modeling synthesis emulation
  • Multiple polyphony modes (Mono, Duo, Quad, True Polyphonic)
  • Supports MIDI MPE and velocity sensitivity
  • External audio excitation
  • Mod Matrix for real-time parameter control
  • 7 unique synthesis modes
  • 6 mod-able and 6 global effects
Features
Read full description

RingsFX is an AUv3 plugin based on the famous Mutable Instruments Rings, one of the most dedicated and fully-featured Physical Modeling Eurorack modules ever created. At its core is a resonator that needs to be 'excited' or 'strummed' by MIDI input, noise, or external audio excitation. RingsFX emulates vibrations of structures simulated by 3 different synthesis techniques that can be plucked or process external signals: Modal Synthesis, Sympathetic Strings, and Inharmonic Strings. Traditionally, Rings was only monophonic but used a unique approach to polyphony that allowed the previous note to 'ring' out and decay while a new note was played. Rings FX provides these same modes (Mono, Duo, and Quad), but expands it with a true Polyphonic mode. RingsFX also expands the capabilities of the original engine by adding support for velocity sensitivity and MIDI MPE mode. The new polyphonic mode allows RingsFX to play up to 12 notes of true polyphony, depending on the settings. Doing so requires RingsFX to use multiple Rings resonators, but the more true polyphony you use, the more processing power it requires. Running in the traditional Monophonic, Duophonic, or Quadrophonic modes may be preferred in order to keep CPU usage under control. RingsFX has 7 modes in total, by combining the 3 basic modes with additional properties such as chords or specially tuned reverbs. The original hardware also had a secret 'Easter Egg' mode, which in RingsFX is simply calling 'Synthesizer' mode, rumoured to be based on one of the early Korg synthesis methods. This mode supported a number of mutable effects which now work on in all resonator modes. RingsFX also has a Mod-Matrix which allows you to combine the built-in LFOs and FEGs to great effect by manipulating parameters and mutable effects in realtime. Finally, RingsFX can be loaded as an AUv3 effect plugin. Set the Exciter Source to 'INPUT', and you can pass any audio through RingsFX and use this audio as an external exciter. For example, it can be used to great affect on a drum beat to create some crazy rhythms. Use the Output Mix to combine the original audio with the synthesised resonator output to create some stunning effects. Features ○ 7 unique synthesis modes. ○ Supports Mono, Duo, Quad and true polyphony. ○ Supports 2 fluid LFO's per note. ○ Up to 4 FEG's per note. ○ External Exciter modes. ○ White noise Pulse Sequencer. ○ Supports 6 mod-able effects and 6 global effects. ○ Mod Matrix ○ Input and white noise filters. ○ Program Manager with drag and drop. ○ Preset Search and Favourites. ○ Easy export and import of banks and presets. ○ Extensive help manual. ○ Web Transfer for backing up to PC/Mac. ○ MPE Support.

Screenshots

Velocity Filter4 screens
RingsFX4 screens

Verdict

The call

The clearest difference is price: Velocity Filter at $2.99 against RingsFX's $14.99. RingsFX's advantage is ratings volume (26 vs 7). On rating, review sentiment, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Velocity Filter costs $2.99 and RingsFX $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Velocity Filter against 4.9 for RingsFX. Both are backed by a comparable volume of ratings — 7 and 26 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Velocity Filter ships an update every 3 weeks, RingsFX fortnightly. The most recent releases landed on September 30, 2026 and October 16, 2026 respectively.

Scorecard2 real differences · 8 level
Velocity Filter versus RingsFX: the parameters behind the verdict, then further details
ParameterVelocity FilterRingsFX
Price$2.99 — better$14.99
Rating5.0 (7 ratings) — better4.9 (26 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings726 — better
Update frequencyEvery 3 weeksFortnightly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size15 MB23 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company Limited4Pockets.com

Customer experience

Velocity Filter

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

RingsFX

All ratings26 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Velocity Filter

No in-app purchases

None

RingsFX

No in-app purchases

Questions

Is Velocity Filter free?
Velocity Filter costs $2.99, with no in-app purchases.
Is RingsFX free?
RingsFX costs $14.99, with no in-app purchases.
Which has better reviews, Velocity Filter or RingsFX?
Velocity Filter is rated higher. Velocity Filter averages 5.0 out of 5 from 7 ratings, while RingsFX averages 4.9 from 26 ratings.
Do Velocity Filter or RingsFX have ads?
Neither Velocity Filter nor RingsFX shows ads.
Which is updated more often, Velocity Filter or RingsFX?
Velocity Filter ships an update every 3 weeks, and RingsFX fortnightly. Most recently, Velocity Filter was updated on September 30, 2026 and RingsFX on October 16, 2026.

Other comparisons