Comparison

Mix Bus Compressor vs FAC Medusa

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

Head to head
About

Mix Bus Compressor

This audio plugin offers ultra-transparent compression with exceptionally low harmonic distortion. Its unique design provides immediate response without adding latency or phase distortion, making it ideal for real-time audio processing. The scalable interface ensures a clear visual experience on all iOS devices.

Highlights
  • Ultra-low harmonic distortion
  • Unique envelope follower
  • Immediate response time
  • No added latency
  • No phase distortion
  • Scalable user interface
Features
Read full description

This compressor has the lowest total harmonic distortion of any plugin we have seen, including desktop units. At the heart of it is a unique envelope follower design that makes it possible to compress the signal without creating distortion harmonics. On the spectrum of compressor tone that ranges from "vintage analog" to "pristine digital", this plugin sits at the extreme end of low-noise digital clarity, but it is different from other low-noise digital designs because it doesn't use digital look-ahead. Therefore its response time is immediate, it adds no extra delay to the signal chain, and it works great for processing real-time performance effects. It uses no oversampling so there is no phase distortion or loss of high-frequency energy from anti-aliasing filters. It also uses no digital-style filters (FIR filters) and no digital look-ahead, so it adds no additional latency to the signal chain. Although it is not a model of an existing piece analog hardware, every component of its signal path is realizable in the analog domain. We think of it as a digital model of our ideal analog compressor: it could exist as an analog circuit but would be very expensive to build with physical analog electronic parts. The user interface is 100% scalable, designed specifically for iOS, so it looks beautiful at any screen size or orientation, from tiny portrait views in AUM on iPhone to the largest full-screen views on iPad Pro.

About

FAC Medusa

This versatile audio processor offers a characterful compressor with multiple dynamic controls. It allows for detailed sound shaping through 3-band tone controls, split frequency compression, and both downward and upward compression types. Enhance your audio with parallel compression, a brickwall limiter, and precise metering.

Highlights
  • Characterful compressor with multiple dynamic processors
  • 3-Band input tone controls with adjustable crossovers
  • Split/Sum frequency bands before compression
  • Downward and Upward compression types
  • Parallel compression and master Brickwall limiter
  • Sidechain and multi-outs support
  • Precise metering with decibel values
Read full description

• Gentle, natural, or aggressive and colorful compressor • Combine different dynamic processors into a single and easy to use unit • 3-Band input tone controls with adjustable crossovers and saturators • Split/Sum frequency bands before compression • Two dynamic controls: Downward or Upward • Range and knee controls to limit compression depth • Parallel compression and master Brickwall limiter • Sidechain and multi-outs support • Precise metering with decibel values • Advanced Responsive Design, portrait and landscape views • AuV3 for iOS (iPad/iPhone) Compressors are probably the most used audio processors and you surely know what it's all about and how it can help to control the dynamic range of your audio signal. So let's get straight to what makes FAC Medusa a new versatile and characterful compressor! FAC Medusa combines different dynamic processors into a single and easy to use unit, the input signal flows along the following stages: 1) "Pre-amp with tone control and saturation circuit" The input signal is split into three bands of frequencies (Low, Mid and High) according two adjustable crossover points. Setting the level and the saturation amount of each frequency band will definitely make the effect more natural or characterful. 2) "Compression" In addition to the usual controls you may expect, FAC Medusa also provides two types of compression. Downward compression, which is obviously the most common, decreases the level of audio signal above the threshold. And also Upward compression which is less known, despite powerful, and increases the level of audio signal below the threshold. The compression can operate either on the SUM of the frequency bands (L+M+H) or on each frequency band coming from stage 1. 3) "Parallel compression and Brickwall limiter" The master Brickwall limiter is optional and will ensure that the output of stage 2, possibly blended with the original audio signal, remain under control. The limiter comes with threshold and release time controls. As you have realized FAC Medusa has many faces: gentle, natural, or aggressive and colorful. Choose the one you want and be prepared for an exciting sound design experience. Whether you are a budding music producer or passionate amateur musician in any genre, you will definitely find a happy use for it! - AuV3 and Standalone App - To use the sidechain and/or to output the additional three bands, you need a host able to provide to the AuV3 an input bus and three additional output busses The documentation is available at fredantoncorvest.com/FAC_Medusa.html

Screenshots

Mix Bus Compressor4 screens
FAC Medusa4 screens

Verdict

The call

The clearest difference is rating: FAC Medusa at 5.0 against Mix Bus Compressor's 3.9. FAC Medusa also leads on review sentiment (100% vs 75%). Mix Bus Compressor's advantage is in-app purchases (none vs 3) and price ($5.99 vs $9.99). On ratings volume, ads, monetization model and device support 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

Mix Bus Compressor costs $5.99 and FAC Medusa $9.99 up front. FAC Medusa sells 3 one-off in-app purchases. Mix Bus Compressor asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FAC Medusa holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 8 and 23 respectively. Written reviews point the same way: 75% of Mix Bus Compressor's written reviews are positive against 100% of FAC Medusa's.

UpkeepUpdate frequency

Mix Bus Compressor ships an update every 6 weeks, FAC Medusa every 4 months. Both last shipped on November 3, 2026.

Scorecard6 real differences · 4 level
Mix Bus Compressor versus FAC Medusa: the parameters behind the verdict, then further details
ParameterMix Bus CompressorFAC Medusa
Price$5.99 — better$9.99
Rating3.9 (8 ratings)5.0 (23 ratings) — better
Positive reviews75.0% of reviews100.0% of reviews — better
Number of ratings823 — better
Update frequencyEvery 6 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.2 — better13.0
Further details — not scored
Size25 MB3 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company LimitedFrederic Corvest

Customer experience

Mix Bus Compressor

All ratings8 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews4 reviews
Positive75.0%
Neutral0.0%
Negative25.0%

FAC Medusa

All ratings23 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews11 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Mix Bus Compressor

No in-app purchases

3 purchases

FAC Medusa

One-time3
  • Small Tip$1.99
  • Medium Tip$4.99
  • Large Tip$14.99

Questions

Is Mix Bus Compressor free?
Mix Bus Compressor costs $5.99, with no in-app purchases.
Is FAC Medusa free?
FAC Medusa costs $9.99, and also offers in-app purchases.
Which has better reviews, Mix Bus Compressor or FAC Medusa?
FAC Medusa is rated higher. Mix Bus Compressor averages 3.9 out of 5 from 8 ratings, while FAC Medusa averages 5.0 from 23 ratings.
Do Mix Bus Compressor or FAC Medusa have ads?
Neither Mix Bus Compressor nor FAC Medusa shows ads.
Which is updated more often, Mix Bus Compressor or FAC Medusa?
Mix Bus Compressor ships an update every 6 weeks, and FAC Medusa every 4 months. Most recently, Mix Bus Compressor was updated on November 3, 2026 and FAC Medusa on November 3, 2026.

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