On Devoicing

PE22/65 (2-9)

Both l and r are partially unvoiced before p, t, k, ty, q, s.

After voiceless stops, in q (= kw), tw, ty, py they {y, w} are partly unvoiced (but not spirantal).

{ty} is followed by an appreciable partly unvoiced y-offglide.

q (kw) consists of a lip-rounded k̊ followed by a partly unvoiced w-offglide

PE19/99 (v.a)

r, l were partly unvoiced before the voiceless stops, s, and the aspirates, in that order

PE19/100 (b)

y, w remained as a rule unchanged, except for a marked unvoicing after p, t, k; s; and the aspirates.