The piano uses both the Treble clef (for higher pitches) and the Bass clef (for lower pitches). It plays in the key of C. Sometimes it is misinterpreted that the Treble clef is for the rigth hand and the Bass clef if for the left hand. This isn't true. Both hands can use the Treble clef or Bass clef, or even the right hand can use the Bass clef and the left hand can use the Treble clef.
Bass clef.
Clefs do not have 'sounds'. They are merely tools to indicate where on the musical stave notes are to be placed. However, the treble clef 'places' higher notes than the bass clef. If a clef is placed in the middle of the staff, then the notes that follow that clef are of that clef. For example, if the bass clef is placed on the treble staff, the notes that follow it are to be interpreted as "bass clef" notes and played using lower notes on the piano. The opposite is true if the treble clef is placed on the bass staff.
bass clef
The Bass Clef is usually the clef used for lower pitched voices.
Treble
They both play in treble clef. Alto plays in the key of E flat, and tenor plays in the key of B flat.
Double Basses normally play in the Bass Clef. On the other hand, they sometimes use Tenor Clef and I have seen Treble clef used for higher notes but transposed an octave lower than written.
The upper is called the "treble" clef; the lower is the "bass" clef.
bass clef
violas dont use treble clef they use alto clef
Bass and also tenor clef.