These are supplemented by MP3 recordings allowing the student to hear what the compositions sound like and to use as play-along accompaniment pieces. The scale goes as follows: B-flat, C, D, E-flat, F, G, A, B-flat Concert B-Flat is the name of the pitch that is sounded whenever a B-flat is played. This type of trombone is typically built with a larger bore size (0.525 or 0.547 inches (13.3 or 13.9 mm)) and is known as a B ♭ /F trombone, F-attachment trombone, or trigger trombone. Video: Play B Flat Major Scale on Trombone If you have problems with any of the steps in this article, please ask a question for more help, or post in the comments section below. Comments These collections are for Low Brass Ensembles or for any of the three low brass instruments (trombone, euphonium or tuba). It's just the way the name has developed, that the B-flat tenor trombone does NOT need to have music transposed, even though the name might suggest it. Trombones without this feature are known as straight trombones. As you see above, music for the B-flat trumpet must be transposed to play with instruments in C. So, you might think that music for the B-flat tenor trombone must also transposed…NO!