In the early hours of this morning I managed to get my hands on an old phone of mine; a Samsung Galaxy A3. It's a 2015 model, so not too dated, but the battery is pretty pants on it ha ha.

Anyhow, I installed the FluidSynth app and found a little USB-OTG adaptor (i knew i had a bag of them somewhere!).

I had a Pro Micro that I had stuck a 'test tone' script on (Playing a middle C for a second, every 3 seconds) and boom - it just worked.

This is perfect for prototyping, as now i can use the phone to quickly test any progress on reading the Pro Micro scripts and interpreting the sensors.

It would also serve as a great 'stunt double' for any Pi-based FluidSynth system while i put together any hardware.

I'm also keeping my eyes peeled for a cheap 5v Amp for the project.

Much cheaper than the Justboom Amp + DAC setup I have on the Pi at present, plus I'd be able to power the amp and the phone from a single 5v power source or a set of stepped up Li-Ion batteries.

Using the phone instead of the Pi could be an absolute game-changer - a brand new handset can be bought for roughly the same price as a Pi these days, and they have all the features needed for this - touchscreen, headphone out, compatibly with software... All without needing to buy extra adaptors or HATs.

Wowzers!