On Fri, 13 Nov 2009 14:57:51 +0100 (CET) karl@xxxxxxxxxxx (Karl Hammar) wrote: > Folderol: > > karl@xxxxxxxxxxx (Karl Hammar) wrote: > ... > > An entire cycle of 48kHz is about 20 uS so jitter would have to be > > significantly less than that to avoid 'cogging'. > > So jitter < 1us would be required ? I think it actually only needs to be less that 10uS > What is "cogging" ? The effect you can get with a system with poor stability but very strong locking when incoming pulses are half way between the wanted times (used to happen a lot with early discrete PLLs). The system will alternately lock on the early and late pulses. The correction waveform looks like a cog railway :) -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
