sinus tone pitch A#2/Bb2 - 116.541 Hz - big A sharp/Bb by Todster on Amazon Music - Amazon.com
Tuning Notes (Bb & A) by Jamey Aebersold Play-A-Long on Amazon Music - Amazon.com
Amazon.com: Glory Brass Bb Trumpet with Pro Case +Care Kit, Gold, No NEED TUNING,Play directlly. More COLORS Available ! CLICK on LISTING to SEE All Colors : Musical Instruments