I am working on a research project to test audio spatialization. The project involves playing audio on 35 different speakers. One speaker is randomly selected to play slightly different audio. Then, The test subject needs to pick out which speaker is playing the different audio. This process is repeated with different speakers.
I have already built a small scale version of this which has 10 speakers using a Focusrite audio interface. However, I need to scale the system up to 35 speakers. And the problem I am facing is a single focusrite only has 10 outputs. And the software I using only supports one device at a time. How do I get around this problem?