Re: Win11 ??
"David McClain (as dbm at refined-audiometrics dot com)" <[email protected]>
| Newsgroups | gmane.lisp.lispworks.general |
|---|---|
| Message-ID | <[email protected]> |
Yes, that 1 kHz signal is what I have injected into the right channel from my AM Modulated IRIG-B signal coming directly out of my GPSD-OCXO. The signal in the right channel is completely unaffected by external RF events. I’m looking closely at the recorded 8 kHz downsampled data vs Reaper recording at 48 kHz, both using the M$ MMS system. Normally, Reaper wants to use ASIO. But that compares apples and oranges against my data acquisition system. Just have to wait to capture a glitch… - DM > On Sep 3, 2025, at 10:36, Yuri Davidovsky <[email protected]> wrote: > > >> On 3 Sep 2025, at 18:47, David McClain <[email protected]> wrote: >> >> I also thought about the possibility of an external RF impulse. > > Another troubleshooting approach that I would try to really narrow it down to the device once and for all would be: > > 1. Get an audio source of some simple signal, like a 1kHz sine wave. Just an old laptop with a basic software synth would do (VCV Rack comes into the mind as a free option). > 2. Feed the 1kHz sine into the device, monitoring for the event. If it takes place, we can probably rule RF interference out. If the recorded signal remains pristine, then the problem is likely higher up the processing chain and there are no issues with the machine used. > 3. If the event occurs on the USB device with the test signal, next step is to reproduce it on another device. We do not need to get very inventive and can simply use the inbuilt mic input on the machine and do another recording session to confirm if the event occurs with the test signal there too. > > If the event happens on the USB device but not on the inbuilt device, we can be sure that there is something off about the USB interface. An interim solution in this case would be to try use the inbuilt audio for signal acquisition, you might need a preamp for it for this particular use case, but there should be a high chance that the problem is identified/solved at that stage. > > If the issue is reproduced on both audio devices, then yes, there may be something off about the OS audio stack, or there may be something up with the machine. _______________________________________________ Lisp Hug - the mailing list for LispWorks users [email protected] http://www.lispworks.com/support/lisp-hug.html