In fact, the situation is much more complicated than that. In 1932, at International Convention on Arabic music held in Cairo, Egypt (attended by such Western luminaries as Béla Bartók and Henry George Farmer), experiments were done which determined conclusively that the notes in actual use differ substantially from an even-tempered 24-tone scale, and furthermore that the intonation of many of those notes differ slightly from region to region (Egypt, Turkey, Syria, Iraq). The commission's recommendation is as follows: "The tempered scale and the natural scale should be rejected. In Egypt, the Egyptian scale is to be kept with the values, which were measured with all possible precision. The Turkish, Syrian, and Iraqi scales should remain what they are..." (translated in Maalouf 2002, p. 220). Both in modern practice, and based on the evidence from recorded music over the course of the last century, there are several differently tuned "E"s in between the E-flat and E-natural of the Western Chromatic scale, depending on the maqam or jins in use, and depending on the region.