Rockrelay Synth FM

Contains adsIn-app purchases
3.4K reviews
Content rating
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image
Screenshot image

About this app

Perfect FM Synthesizer - DX7 full emulation. Full MIDI support.

* Compatible with the sysex files from original Yamaha DX7
* Full 6 operator Frequency Modulation Synthesis.
* Midi keyboard and controllers supported via USB OTG.
* Bluetooth BTLE MIDI support.
* Excellent 8 octaves in-app keyboard.
* FX Reverb and Delay.
* System exclusive.
* Zero Latency!

NOTE: If you got stuck keys, when pressing a chord, please switch off the 3 FINGER GESTURE from your phone settings!

All features are available before purchase, and can be unlocked after watching rewarding video ad! Please, test everything before purchase!
If you have any issues with your midi controller, or the android device, please do not buy the app!
Buying the app removes all ads and unlock all features forever. This is a One-time purchase! All future updates included!




DX7 new voices online creator:
Updated on
Dec 3, 2020

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
Learn more about how developers declare collection

Ratings and reviews

3.2K reviews
erik majer
September 17, 2023
Issues with demo version. The interval between commercials is very short to evaluate the app. The volume of the demo version is very low, but the commercials are loud. Is it on purpose for the demo version? Otherwise it works pretty well with my midi sax. The latest update is from 2020, are you planning further updates or the development is frozen?
3 people found this review helpful
Did you find this helpful?
Trabalizer Quartet
January 4, 2021
This is a very comprehensive fm synth app, and deserving of a great review, however, there's one small problem that breaks it a bit. If you happen to turn the envelope release to max on any operator, any note played while this knob is in the max position will be left perpetually ringing no matter how envelopes are readjusted. The only fix that I have found for this is restarting your whole phone. Even if you exit the app, the angelic sound of this app will be left humming. 5 stars without bug.
527 people found this review helpful
Did you find this helpful?
Za Za Ramah
September 18, 2023
I hardly compliment things like this, but I'm telling you now, to whoever made this app, I THANK YOU!!!!! Out of ALLLLLL the piano midis, I've found this to be the absolute best. It doesn't require you to do to much, and the person NEVER changes the app!!!! Ive had this on my laptop for shy of a year to date, and now, I just got a bigger phone, needing a midi for go because I'm a church musician, and dude got this one Good. Y'all trust me, I'm from GEORGIA😂.
1 person found this review helpful
Did you find this helpful?

What's new

Bug fixed Sysex file opening.