Recently I found out that I was not the only one trying to build a synth module out of a Raspberry Pi with ZynAddSubFX. The Zynthian project is trying to achieve the exact same goal and so far it looks very promising. I contacted the project owner to ask if he would be interested in collaborating. I got a reply promptly and we both agreed it would be a good idea to join forces. The Zynthian project has all the things that I still had to set up already in place but I think I can still help out. The Zynthian set-up might benefit from some optimizations like a real-time kernel and things like boot time can be improved. Also I could help out testing, maybe do some packaging. And if there’s a need for things like a repository, web server or other hosting related stuff I could provide those.

I’m very happy with these developments of our projects converging. Check out the Zynthian blog for more information on the current state of the project.
As we say in Germany: Zauberhaft.
Are you two interested in porting that project to the Odroid-C1+, too? I’d like to help.
Ouch, a bit late but please contact José of the Zynthian project 😉
Hey @Georg, the current build system is ZynthianOS and it could create Armbian builds that would support Odroid-C1+. But you will need to help out, I have no way to test them.
Hi
I’m planning to do a similar project on an Orange PI PC (Allwinner H3 SOC), to run Hydrogen drum machine.
I think that it might be a good idea to build a custom “linux embedded”, special kernel with only needed drivers, bare minimum libraries, etc…
What do you think about this, would you be interrested in giving me a hand ?
Regards !
Hello Ludovic, sounds like a great plan! I’m part of the MOD team (http://moddevices.com/) which kind of sucks up all my spare time. So at the moment I just don’t have the time to help out 🙁
Hi Jeremy, cool audio projects you are running on the RPI.
I have a RPI3 where I “almost” have gotten Jack up and running with a USB soundcard. After using qjackctl and tweaking the buffers etc, the latency I get without immediate xruns are in the 10-15ms range when i try to pipe input to output with jack.
However….., after some minutes the sound becomes very noisy. However there is no crash or overruns at least when I set the soft option to ON.
I tried your USB 1.1 tweak in boot.txt but then my keyboard attached to the RPI 3 didnt work anymore (LOL).
The goal is to run with GUI via HDMI, a soundcard taking (mono is ok) sound in and doing some audio effects on the audio, sending it out via the audio out.
What do I have to do on the rpi3 to get this running?
By the way, forgot yo mention that the sound becomes OK again, then after some minutes, the metallic noisy sound comes again.