[AudioI] Audio Injector Isolated GPIO Pin Use

[Jonathan]

Hello,

Does the Audio Injector Isolated make use of any GPIO pins on the Pi
other than the I2C and I2S lines? If so, which ones does it use?

Also, can I simply solder a header to the unpopulated passthrough
header and have direct access to the GPIO pins? I use a total of 4
GPIO pins in my project.

Thanks.

Jonathan