On the other hand, the nowadays widespread application of equidistant 24-tones on Arabic and 72-tones on Turkish qanun models presents an ongoing source of controversy. This is particularly in regards to how adequate such Eurocentric octave divisions are in faithfully reproducing the traditionally or classically understood fluid pitches and inflexions of Arabic music or Ottoman classical music scales. Pitch measurement analyses of relevant audio recordings reveal that, equal temperaments based on bike-chained "multiples of twelve" are essentially not compatible with authentic Middle Eastern performances; substantiating the notion instruments strictly based on them would clash audibly with a justly tuned/intoned tanbur, oud, ney, or kemenche.