Change audio format

[josiasMO]

Hi @briankendall ,

First of all, congratulations on the project. It's very good and it will be very helpful to me.

One suggestion that I have is to make the audio format configurable as well. Currently I saw that it is set as Float 32bit and it cannot be changed:

Could you help me on the process to change it to be Int 16bit instead?

If you think this could be a good addition to the project, I could submit a PR with the changes to add support for it if you give me some guidelines on the necessary changes.

Thanks,