Comannd 02xx An 01xx

I noticed what this command is relaited to speed of song
is there a method to make sample slide down and up
changing song bpm , and preserving pitch of sample (melody)
bad english,i so wiki but didnt find any note slide effect
thank you

not only is related to BPM, but also to the actual note pitch (see related tutorial page).

the only way to preserve the correct values is to multiply them accordingly to BPM changes.

01xx/02xx really needs to be rethought, and it’s on the to-do list, pretty high in the queue too…