The following sampling rates are supported for sound files (at least in R11)
11, 22 and 44 kHz at 8-bit and 16-bit
WAV Import
Only uncompressed WAV files are supported.
Markers included in the WAV files are imported into CINEMA 4D.
AIFF-Import
iMac 24", OSX 10.6.2, Vue 8 xStream, modo 401, C4D 11.5
http://www.claude3D.com