Well... there is no right or wrong to what kind of forums one visits.
It just depends on your purpose. If you are looking for inspiration, I guess you are in the right place (if pixel art inspires you, that's it).
If you are looking for criticism, while some members might also make 8bit music, you might not get as much in depth feedback as on an 8bit music focused forum (if that even exists).
Though, feel free to post your pieces in the
Off-Topic Creativity thread.