Theory
Tiz (high)
Tiz
A high, thin sound. Placed before a pitch name it shows the octave above that pitch (tiz segah, tiz çargah, and so on); some pitches have a separate name for their upper octave: the octave above Rast is Gerdaniye, and above Dügah is Muhayyer.
Related: Kaba (low)OctaveGerdaniye