Re: [time-nuts] Timestamping audio waveforms

2018-03-31 Thread Magnus Danielson
Hi Tim, On 03/31/2018 04:41 PM, Tim Shoppa wrote: > 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 cal

Re: [time-nuts] Timestamping audio waveforms

2018-03-31 Thread Hal Murray
tsho...@gmail.com said: > 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 assume the audio API is for a batch of samples. If you get time stamps on a stream of batches, you can work out the frequen

Re: [time-nuts] Timestamping audio waveforms

2018-03-31 Thread Attila Kinali
On Sat, 31 Mar 2018 10:41:45 -0400 Tim Shoppa wrote: > Can Audacity do this kind of timestamping for me based on the system clock? I don't know about audacity, but writing a small program in c that reads from the soundcard and does the timestamping is pretty easy. Should be less than 50 lines of

[time-nuts] Timestamping audio waveforms

2018-03-31 Thread Tim Shoppa
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 s