Sorry for the long delay between updates folks.

Build update :- I am currently working on building a little enclosure to house my Pi and the 5 switches. I have a few analog expander chips on the way, which I will use to add a potentiometer to my inputs to simulate an expression pedal.

Today i have also ordered an audioinjector soundcard for my Pi:

https://shop.audioinjector.net/detail/Sound_Cards/Original+Pi+Sound+Card

I really wanted to make my pedal all inclusive, and plugging in a USB interface to handle audio, well, it sucked.

This soundcard will go onto my Pi, connects via SPI (leaving all my gpio pins used fornbutton handling completely free for that job) and is already supported in the Linux kernel so it shouldn't take a while lot of work to have it working with JACK.

I'm feeling good about this build ; once my parts arrive Ibshould be able to finally build it, and for once it'll actually match what I had in my head when I first set out to build it.