I would like sub-millisecond timestamps for a mono audio radio signal that I have in the shack.
The timestamps could be continuous (Every sample) or just every "frame" where maybe a frame is a second to a minute. I would like to calibrate both the absolute time as well as the delta time between samples based on the timestamps. (I would expect that say a nominal 48kHz sample rate would be off by many tens of ppm because of crystal tolerances.). I have a both Windows and Linux based PCs running Audacity with a local GPS-based LAN refclock and ntpd. I trust the ntpd time to be stable to the sub-millisecond. Can Audacity do this kind of timestamping for me based on the system clock? Or should I, say, take the PPS from a GPS, and feed it into channel 2, with the audio going into channel 1, and make a stereo recording? I suppose I could then manually label the filename with the second the recording was begun. There would likely be some delta (maybe half the sample interval?) between the two channels but I'm fine with that as long as it is at the sub-millisecond level. Tim N3QE _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.