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OPL AUv3 FM Synth

🇺🇸 United States
Jorge Reales  | 
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47
ASO score
Text
45/100
Reviews
50/100
Graphic
60/100
Other
0/100
rating
App Rating
4.7
rating
Votes
41
rating
App Age
7y 8m
rating
Last Update
Aug 13, 2025

Compare with Category Top Apps

Top 10
Metrics
Current App
Category Top Average
Difference
Rating
4.68
4.57
+2%
Number of Ratings (Voted)
41
593.4K
-100%
App Age
7y 7m
8y 5m
-10%
Price
$7
$1
+713%
In-app Purchases Price
$0
$42
Update Frequency
151d
31d
+392%
Title Length
17
25
-32%
Subtitle Length
20
27
-26%
Description Length
465
2 749
-83%
Number of Screenshots
390
1267
-69 %
Size
35MB
223MB
-84 %

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Text ASO

Title (
Characters: 17 of 30
)
OPL AUv3 FM Synth
Subtitle (
Characters: 20 of 30
)
OPL chip based synth
Description (
Characters: 465 of 4000
)
The Yamaha OPL2 chip, introduced in 1985, shaped the sound of 80s and 90s video game soundtracks. discoDSP OPL emulates the OPL2's FM and additive synthesis, including its distinctive percussion mode. With 16x oversampling for crystal-clear sound and over 2000 included presets, discoDSP OPL is ideal for classic game soundtracks, electronic music, or crafting unique sounds. Bring the iconic OPL2 chip to your productions. Standalone app requires a MIDI keyboard.}
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Rating & Reviews

Reviews Overview
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Rating
4.7
41 voters

Some Latest Reviews

Neumuzik
13 Aug, 2025
1
First, version 2.7 update no longer works as an Audio Unit in GarageBand. Second, if you could add an onscreen keyboard it would make the app more useful as a standalone and speed up new patch creation. Thank you.
now_its_dark
30 Mar, 2021
4
For people who just want to load a patch from the tremendously large built-in library and integrate with a host for sequencing from another app (or playing via midi keyboard) this app would be great. Not so much for my purposes however, though I can’t fault it a great deal for this. It’s a fantastic emulation and the patches are solid and plentiful. Below I will explain why it didn’t work for me though, in case you are planning similarly: Since this is an accurate emulation of a real hardware chip using a standardized OPL fm preset format, I was counting on there being an easy method for programming, testing and storing presets within the app. My goal in buying this was to have a portable way to create and build a library of my own original patches to use with Adlib Tracker ][. This use-case has proved mostly fruitless however for the following reasons— 1. The standalone app does not properly fit an iPhone screen (iPhone X at least); the bottom row of buttons runs below the edge of the screen. 2. There is no way to save your own patches directly inside the app, only load the existing presets. 3. There is no built-in keyboard, basically it’s a plugin more than an app and relies on a host to do most useful things. 4. On an iPad 11” I wasn’t able to scale the view to fit both the complete instrument UI and the AUM virtual keyboard on-screen simultaneously, making it cumbersome to edit, play and test custom patches. (Honestly this one might be user error, please correct if I’m wrong and there’s a way to achieve this)
john signal
13 Dec, 2020
4
This is a great, straightforward 2-op FM synth, but on my 5th gen IPad mini, the UI of the AUv3 in Cubasis and AUM is tiny. It doesn’t even come close to filling up the AU window the way other instruments do. It would be nice if the dev would rework the interface for smaller IOS devices rather than simply porting the interface from the desktop version. Otherwise, I’m glad to have it on my iPad. It’s a classic!
Tenente
25 Sep, 2020
5
I’ve been trying to find this “sound” on iOS for a few years. There are a lot of 8-bit/chip/lo fi apps but I never felt the sound was quite right; they didn’t sound like it did back in the day when I was kid. I have come to love OBx and in similar fashion this synth sounds just as genuine and authentic as the original synth it emulates. This devs apps deliver true, authentic sounds with plenty of parameters to manipulate. I don’t know much about the technical side of it, but if you want the best 80s synth tones, you found it.
JohnFBP
24 Jun, 2020
5
Great work but would love a more visible preset bar. Sounds great, thank you! EDIT: Preset bar has been updated and it’s perfect.
mbadenpowell
07 Jun, 2020
3
Good sounding simple to use fm synth. However, it needs full automation support / midi cc and finer resolution for the parameters
Conrad Keely
06 Jun, 2020
4
These sounds are really great, and the ammount of presets is over the top. But because there are so many presets, it would be great to be able to recall favorites. However when changing programs up and down (+, -) there is no display telling you what preset you’re playing, and therefor no easy way to recall it later. The current preset is also not highlighted in the preset menu when browsing. This would add invaluable functionality to a very cool-sounding synth.

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Additional Information
Rating:
4.68
Voted: 41
App Store Link:
Price: 6.99 $
Website:
Email: -
Privacy Policy:
Categories: Music
Size: 34MB
App Age: 7 years 8 months
Release Date: May 22, 2018
Last Update: Aug 13, 2025
Version: 2.7
Version history
2.7
Aug 13, 2025
Oversampling switched to 8x for better CPU performance and similar sound quality. New menu button adds Export button with Load/Export options. Modern popup menus with improved styling. Per-project window size memory. Reduced CPU usage during parameter automation and GUI processing. Smart processing only affects active channels. Optimized voice management eliminates audio dropouts. Enhanced oversampling initialization and memory management. Improved plugin state management and build system updates. Major framework update.
2.4
Aug 14, 2024
16x oversampling for pristine, alias-free sound. Optimized voice management for enhanced efficiency and performance. Updated interface with modern elements for a smoother user experience. Significant core framework improvements for greater stability and performance. Fixed crash issue when triggering more than 9 voices simultaneously.

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