After spending quite a lot of time testing out different combinations of kit – considering all factors for compatibility, and then – a lot were down to cost.

So far, this is what we are using each device… 

1 x Raspberry Pi
1 x Stealth Black Raspberry Pi Case
1 x Arduino Uno
1 x Altec Lansing Orbit mini speaker
1 x Griffin imic
1 x  Audio Technica ATR-3350 Omnidirectional condenser Lavalier microphone
1 x  Anker Astro 5600mAh Battery Pack
1 x Maplins project box
6 inch A to B USB cable
6 inch A to micro-B USB cable
1 x USB hub – (various types with power supply for when setting up patch using mouse)
Various buttons, knobs and switches
1 x Sonar distance sensor (still working with a variety of these to compare, before buying lots of one type)

Quite a lot of stuff!!.... Soooo at the moment – it’s a bit bigger than I first imagined (mainly because of the size of USB cables,  especially the end bits) and it was a little bit of a struggle to fit everything into a box nicely – but the idea was to have something mobile that we could walk around with to try out… I decided to fit the speaker into the box too – which takes up most of the space, but this means it’s all contained. I am imagining the box is ‘worn’ on a belt somehow – so we’ll explore how that can work further with the choir… I also need a way to have the microphone in the right place by making some kind of head or ear mount system – can’t seem to find anything off the shelf for this so far.

Controls on the box – for first try out 
Volume knob
Toggle switch to change from ‘live stream’ mode to ‘record in a sample’ mode
2 buttons to select a ‘preset’ –  (previous / next)
RECORD button  (momentary – so when it is pressed in, it records, and when released it stops recording)
Matt got the Pd patch interfacing with the buttons, switches and knobs which I soldered together and fitted in the box and… voila !… it works !!  - very pleased!

… now the real fun starts... we can walk around with it making sounds effected by proximity to other things : ) … great!