Notes: Many divergent and corrupted forms of the symbols occur in manuscripts.
The most significant variants and uncertainties relate to the following:
54-53 and 51- instr., see Winnington-Ingram, Philol. 122 (1978) 241-8.
24 instr.: Gaudentius and Boethius give and (chromatic ) respectively, Alypius
16 vocal: or perhaps . See Winnington-Ingram, Philol. 117 (1973) 247 n. 9.
6-4, Aristides Quintilianus gives
For 6 Gaudentius gives (and at 8 vocal he gives ).
The design of the above table is modelled on Pöhlmann, DAM 144, but there are modifications of detail.
the second sharp of the next triad up or by the natural above that, depending on whether this natural is a major or a minor third higher than the one we started from.8 The second sharps also serve in other
8 In a few of the unpublished Hellenistic fragments (10)possibly belonging to a single textthe upper movable is notated by the first sharp instead of the second
and 
(chromatic 
) respectively, Alypius 
(and at 8 vocal he gives 
).