Now, I know that a double flat lowers the note by two semitones but I have a question. I just got a new solo for bass trombone because i play that instrument and there's a note if the dont understand. There is a regular Bb, right on top of the staff that has a double flat and I have been looking online for how to figure it out but I cant find anything. I just want to know what the position for a Bb double flatted. Thank you
It doesn't matter where the double B flat is. What does matter is the it has two flats in front of it. No matter where it is , you will play an A natural. (Could be 2nd position)
A double flat is one whole step from the original note.
If it does not have a double-flat symbol, then it is not a double-flat.
If you need further clarification, you can take a photo of the notes in question and show them.