Igbo is interesting for having both labialized velars as well as labial-velar double
articulations. Another of the many West African language having labial-velar plosives
is Ewe; the articulatory details are discussed at length in Ladefoged & Maddieson (2008, pp. 332-343).
ka ("older")
akʷa ("bed")
ak͡pa ("bag")
ga ("go")
agʷa ("behaviour")
ag͡ba ("fame")
ŋʊ ("drink")
ŋʷʊ ("die")
Audio Source:
Illustrations of the IPA.
References:
Ladefoged, P. / Maddieson, I. (2008): The Sounds of the World's Languages. Malden, MA: Blackwell.