Amendment 8 to ITU-T G.729.1 adds new Annex G that describes an alternative floating-point implementation of the superwideband monaural extension described in Annex E. Annex G has, as electronic attachments, the reference ANSI C-source code and associated test vectors. The latter can be downloaded from the ITU-T Test Signal Database at‌Gseries.htm#G.729.1.