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This is a misconception; Low windmisconception: low brass/woodwind instruments (as you mentioned: bassoon, tuba, trombone) are faster than you'd think. A bass clarinet is not slower than a BbB♭ clarinet, a tuba isn't slower than a trumpet.

In the two passages you provided, no low wind instrument should have trouble playing the bottom staff, assuming a decently skilled player.

This is a misconception; Low wind instruments (as you mentioned: bassoon, tuba, trombone) are faster than you'd think. A bass clarinet is not slower than a Bb clarinet, a tuba isn't slower than a trumpet.

In the two passages you provided, no low wind instrument should have trouble playing the bottom staff, assuming a decently skilled player

This is a misconception: low brass/woodwind instruments (as you mentioned: bassoon, tuba, trombone) are faster than you'd think. A bass clarinet is not slower than a B♭ clarinet, a tuba isn't slower than a trumpet.

In the two passages you provided, no low wind instrument should have trouble playing the bottom staff, assuming a decently skilled player.

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This is a misconception; Low wind instruments (as you mentioned: bassoon, tuba, trombone) are faster than you'd think. A bass clarinet is not slower than a Bb clarinet, a tuba isn't slower than a trumpet.

In the two passages you provided, no low wind instrument should have trouble playing the bottom staff, assuming a decently skilled player