1/60 • f/5.0 • 58.0 mm • ISO 2500 •
Canon EOS 70D
EF24-105mm f/3.5-5.6 IS STMEXIF - See more details
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The music machine (Explored)
The valve system on a bass trombone increases the length of tubing through which air flows, lowering the pitch and making additional notes and optional positions possible. These valves are controlled by the thumb and third finger.