Just what I needed!
For Arduino Teensy Guitar Audio Shield
I realised ages ago that whilst I could put together a rudimentary digital circuit I was clueless when it comes to analogue audio. This board is just great and perfect for me. Steve was also really helpful with shipping. I plan to put it inside an 80's digital guitar for built-in effects and it is just the right size, sounds great and plays nicely with other Arduino boards and the IDE (I have connected them over serial). The only downside for me was the import costs, but that was to be expected. Well worth the money to get programmable guitar effects.