There is a repeated part in a song I'm playing, where I'm supposed to change the voices. It stays organ, but a different type both the times.
The thing is that after the repetition is over, the changed sound does not fit well and just the first organ sound (which is played the first time, before the repetition) suits better for the rest of the song.
So, can I again switch sounds?? Though it does not say so on the sheet...
You are the driver, you decide where and how to go! It sounds like it's someone's arrangement, and especially if it's a solo piece, you get to decide. You may want to revert to the original sound, you may decide to use a new one for the other part. It's up to you.
If it's playing with others, it may be a different kettle of fish, and maybe the bandleader has a say. That happens quite a lot in a big band I work with - I play a particular sound (I think it's appropriate), but the bandleader suggests (sometimes strongly!) that I try several others, till he's happy. After all, that's part of his job.
