Amuzgo contrasts ballistic and controlled
syllables. Ballistic syllables have sharply falling pitch
and amplitude contours. It also has three level tones and
high-low, mid-high and low-mid contour tones. The
prenasalized stops are described as occluded
(post-stopped) nasals with a "lenis" homorganic stop.
They contrast with nasal + stop sequences. A possible
analysis (not among those suggested by Bauernschmidt) is
to treat these as allophones of the plain nasals before
oral vowels since the oral/nasalized vowel contrast is
neutralized after a nasal. This would mean that a velar
nasal would only occur before an oral vowel, so it is not
accepted here. Bilabials and t,n are described as
velarized.

Bauernschmidt, A. 1965. Amuzgo syllable dynamics. Language
41: 471-483.

Longacre, R.E. 1966. On linguistic affinities of Amuzgo.
International Journal of American Linguistics 32: 46-49.