From the article:

    jackd_args="-r -d oss -r44000 -p1024 -n2 -w16 -i4 -o8 -C /dev/dsp0 -P /dev/dsp0"

I'm presuming the rate "oss -r44000" should actually be "oss -r 44100" for normal audio (or 48000 for audio to be embedded in video output, 48000 also appears to be the default rate).