Hey, so I have 2 of these ICs, I tested the other one and the ardino reads a nearly constant 790, with a 1023 spike at the start.
As for the sequence I don't know if I'm doing it right, I'm using code from the sparkfun example and the post I linked above.
Edit #1 I have found an arduino library which does all the timing and should in theory work, but it still gives a constant 1023 on the first and a constant 790 on the second chip
Edit #2 So it turns out that the ground rail on my breadboard is broken so the circuit was not grounded thus it did not work. Now it reads a normal voltage tho one of them is still defective I think
Edit #3 So I tried to check the frequencies with a frequency generator and it turns out that for some reason the 63Hz and 6.25kHz and the 160Hz and 16kHz bands move together so the chip only shows 5 channels, the one which should be the 2.5kHz one shows the highest at around 9.5kHz