In the early 80s, a friend an I did use it for sampling audio, but in conjunction with his audio equipment to play the audio back more slowly. The quality wasn't really useable, so the previous answer is probably corrent!
The volume/attenuation don't seen to be quite logarithmic, but that may be due to using multiple waves at the same frequency being synchronised for double volume or cancelled to 0. It may be better to use frequencies 1, 2 and 4 to get a more consistent output.
I have used the noise channel in my sample playback, although it didn't improve the quality, it ...
I did it for a game, but it was a mess.
It was a port of a 2-way fine scroller... by making it a 1-way scroller, we trashed the game pretty badly... it was definitely not faithful to the original. This alone was a disappointment to me and to the client.
Horizontal fine scrolling was simply not on the menu.
It was not achievable. We could horizontal scroll ...
According to https://en.wikipedia.org/wiki/Adaptive_tile_refresh:
CGA (the previous generation of PC graphics hardware) lacks features for scrolling in hardware
so PC games started featuring hardware scrolling only with EGA.
That paragraph is wrong, or better, it lacks a much needed refinement:
CGA did not provide horizontal hardware scrolling. Continue ...