0 used to refer to percussion instruments that do not produce sounds of a definite pitch -- （打击乐器）没有固定音高标准的
Unpitched, or indefinite-pitched instruments, such as cymbals, gongs, or tam-tams make sounds (produce spectra) rich in inharmonic partials.
The vast majority of extant works use the anvil as unpitched.
As mentioned above, the introduction consists solely of unpitched and single-pitch riffs.
Special unpitched stops also appear in some organs.
Percussion instruments are sometimes classified as pitched or unpitched.
It includes three main genres, all focussed on rhythm and featuring unpitched percussion.
The increase and decrease of the dynamic envelope coincide respectively with unpitched and pitched material, which leads us to conclude that there is congruence between the dynamic and spectral aspects.
Kakegoe, therefore, refers to an auxiliary pitched or unpitched call.
