Couple of observations
- RCA cables would be for audio, and though possible would be strongly recommended against for video. Are you SURE RCA cables for Video?
Your log shows you are running NDI. Is you video Feed NDI (over Ethernet)? Your scene naming would seem to indicate that is the case
06:59:50.065: CPU Name: Intel(R) Core(TM) i7-10700F CPU @ 2.90GHz
I'm running on a stock Optiplex with a 10700K, and it works well, so this should be fine
Game DVR: On
Is this on for a reason? typically recommended to disable if not in use, right?
Adapter 0: NVIDIA GeForce GT 730
ugh.. that is an ancient GPU (understandable with GPU prices of late... but I got my Optiplex with a GTX 1660 Super, which has the Turing NVENC. With GPU prices returning to normal, for significantly improved video stream/recording quality, I'd strongly recommend considering upgrading to a GTX 1650 Super or newer/higher (either Turing or Ampere NVENC). .. beware supposedly some more recent 1650 cards have Turing NVENC, while the original card did not (hence recommending 1650 Super instead as all of them are Turing). If price difference is small, I'd get lower-end Ampere (ex RTX 2060) vs a Turing based GPU
Beware you audio settings on the OBS PC. You have a mismatch of sampling rates
06:59:51.322: WASAPI: Device 'NS24D310NA21 (NVIDIA High Definition Audio)' [48000 Hz] initialized
06:59:51.525: WASAPI: Device 'Microphone (USB2.0 MIC)' [96000 Hz] initialized
What is the low resolution USB 2.0 camera for? Do you use that for a side image of service bulletin, music, etc? or ??
Assuming you are NOT using the audio from the USB 2.0 camera, I'd recommend going into the OS and disabling it
Also, to keep things simple for myself and our HoW livestream, I disabled the OBS Global Audio inputs (so no Desktop Audio), and then added ONLY the desired Audio Input in the appropriate scene(s).
In my case, we have a Presonus AR12 USB, though I'm using a sub-mix analog output into a gain adapter into a TRRS cable into the PC (front panel, and 3.5mm TRRS input on read sounds poor.. never bother to look into further. At some point, maybe.. I'll figure out getting Presonus Studio One Artist (DAW) setup, with a digital/USB audio connection, and be able to individually adjust each mic channel on the OBS PC.
There are a number of TriCaster models. Which one are you using?
And if you are sending video out of the TriCaster to the OBS PC via NDI, why aren't you sending audio over same (single) Ethernet connection? ie the audio would be included in the video signal, similar as to having audio and video in HDMI or other signal. I don't get using RCA cables for audio
Also, with the various audio sources listed in the OBS log, I'm curious if there is some basic audio setup/routing at Operating System (OS) and/or OBS level? or if there is some audio processing going on in the Presonus and/or TriCaster causing an unexpected/undesired effect
My oft-repeated advice - test and troubleshoot audio and video inputs OUTSIDE of OBS.
In you case, have you confirmed (either direct recording or someone with really good ears, in noise isolated setup) to make sure audio coming out of Presonus is as expected and not clipping. Then making sure audio output of TriCaster is as expected (using the connection you'll use to the OBS PC [ie if RCA hook it up to speakers or a recording/listening device and confirm no dropout]. Personally, I'd avoid RCA cables ... it is just too easy to cause interference on such cables. Then, once that all confirmed, listen/check at the OS level (without even starting/running OBS). My audio knowledge is my weakest area. There are lots of possible misconfigurations in the audio settings on the Presonus or TriCaster that could cause your issue
Summary - lots of possible sources of audio issues in your setup, and without knowing more, I simply providing a high-level list and test sequence for them. Obviously, I don't know which audio path components/setups you've already checked. In general, my thinking (without being a TriCaster user) would be to route audio over same NDI connection as video. Or use a digital (USB connection) from TriCaster to OBS PC. And if none of those possible (which seems HIGHLY unlikely) would I go analog, and then I'd insist on a shielded audio cable to PC (if you must use RCA audio, then I'd get a RCA to TRRS cable, and plug that directly into PC.. no capture card which is simply an additional potential failure point)
Finally, if using the Tricaster, why use OBS? Why not stream direct from TriCaster?
We use OBS as I have our Service Bulletin (PowerPoint) displayed alongside video. But unless compositing multiple sources, I'd be inclined to keep it simple and not use OBS, as graphic overlays, lower thirds, etc can all be done on the TriCaster. If need be, you could have misc inputs (like USB webcam, PowerPoint, etc) go from PC to TriCaster (ex, using HDMI or NDI) and stream/record from TriCaster
