# OPL AUv3 FM Synth vs Surreal Machines Diffuse

The clearest difference is rating: Surreal Machines Diffuse at 5.0 against OPL AUv3 FM Synth's 4.4. Surreal Machines Diffuse also leads on review sentiment (100% vs 73%) and price ($7.99 vs $9.99). OPL AUv3 FM Synth's advantage is ratings volume (24 vs 6). On ads, in-app purchases, monetization model and device support there is nothing between them.

OPL AUv3 FM Synth costs $9.99 and Surreal Machines Diffuse $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Surreal Machines Diffuse holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 24 and 6 respectively. Written reviews point the same way: 73% of OPL AUv3 FM Synth's written reviews are positive against 100% of Surreal Machines Diffuse's.

## The numbers

| Metric | OPL AUv3 FM Synth | Surreal Machines Diffuse |
| --- | --- | --- |
| Price | $9.99 | **$7.99** |
| Rating | [4.4 (24 ratings)](https://appshunter.io/ios/app/opl-auv3-fm-synth/id1516617949/reviews) | **[5.0 (6 ratings)](https://appshunter.io/ios/app/surreal-machines-diffuse/id6449301191/reviews)** |
| Number of ratings | **24** | 6 |
| Positive reviews | 72.7% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Paid | Paid |
| Size | 35 MB | 8 MB |
| Requires iOS | 15.0 | **14** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [DiscoDSP LLC](https://appshunter.io/developer/1465262828) | [Surreal Machines](https://appshunter.io/developer/1688572197) |

## What reviewers say

### OPL AUv3 FM Synth

[App page](https://appshunter.io/ios/app/opl-auv3-fm-synth/id1516617949)

Emulates the iconic Yamaha OPL2 chip for classic game soundtracks and electronic music. Offers FM and additive synthesis with over 2000 presets and 16x oversampling for clear audio. Requires a MIDI keyboard for standalone use.

**Highlights:** OPL2 chip emulation, FM and additive synthesis, Distinctive percussion mode, 16x oversampling, Over 2000 presets, Standalone MIDI keyboard support

**In-app purchases:** none


### Surreal Machines Diffuse

[App page](https://appshunter.io/ios/app/surreal-machines-diffuse/id6449301191)

This audio effect plugin blends analog-modeled delay with classic digital reverb, allowing users to morph between the two for unique soundscapes. It offers intuitive control over smearing, echoes, and damping, inspired by vintage hardware.

**Highlights:** Analog-modeled delay, Classic digital reverb, Morphing between delay and reverb, Nonlinearities and tape-style delay, Intuitive control over smearing, echoes, damping, AUV3 plugin compatibility

**In-app purchases:** none


## Frequently asked questions

### Is OPL AUv3 FM Synth free?

OPL AUv3 FM Synth costs $9.99, with no in-app purchases.

### Is Surreal Machines Diffuse free?

Surreal Machines Diffuse costs $7.99, with no in-app purchases.

### Which has better reviews, OPL AUv3 FM Synth or Surreal Machines Diffuse?

Surreal Machines Diffuse is rated higher. OPL AUv3 FM Synth averages 4.4 out of 5 from 24 ratings, while Surreal Machines Diffuse averages 5.0 from 6 ratings.

### Do OPL AUv3 FM Synth or Surreal Machines Diffuse have ads?

Neither OPL AUv3 FM Synth nor Surreal Machines Diffuse shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*