A clef is needed for any pitched voice or instrument.
The Trombone does NOT transpose, the player does. With that said, if the music is written in Bb Bass Clef, one does transpose in Bass clef. Most Bass Clef music is in C Bass clef, but the player has learned how to read in concert pitch, so there is no transposition needed.
The viola is written in alto clef because that is its musical note range. Note that you are required to learn "the violin clef" too. Also because we needed another clef... and violas are special and didn't fit into any of the other instruments' ranges.
The viola uses the Alto clef. This clef is sometimes called the C clef.
clef
Cor anglais music is read in treble clef.
The Trombone does NOT transpose, the player does. With that said, if the music is written in Bb Bass Clef, one does transpose in Bass clef. Most Bass Clef music is in C Bass clef, but the player has learned how to read in concert pitch, so there is no transposition needed.
Violin music is written using the treble clef.
Bass Clef Treble Clef
The viola is written in alto clef because that is its musical note range. Note that you are required to learn "the violin clef" too. Also because we needed another clef... and violas are special and didn't fit into any of the other instruments' ranges.
The time signature comes after treble clef when writing a piece of music.
The viola uses the Alto clef. This clef is sometimes called the C clef.
Sousaphone music can be transposed in both bass and treble clef
A bass clef is basically a trebble clef, but it tells you it's bass music/tablature.
clef
If you mean what clef, that would be treble clef.
Cor anglais music is read in treble clef.
Bass Clef (played by the left hand on a piano), looks similar to this: ):Treble Clef (played by the right hand on a piano), looks similar to this: &