Scordatura notation exists in a number of different types. Treble clef, alto clef and soprano clefs are all used by different composers. Bass clef is typically used for notes on the lower two or three strings (6 or 7 string instruments) and usually sounds an octave higher than written. In scordatura, one imagines that one is playing a violin (or in some cases a viola, where alto clef is used) tuned in the normal fifths. Scordatura notation informs the player not about what note will sound but rather about where they should place their fingers; therefore, it may be referred to as a tablature or "finger" notation.