Thanks! Could you help me changing the setting as you described regarding "Your Desktop source is set to Default"
Settings -> Audio. It's in one of your original screenshots.
If you don't use it, Disable it. No sense in keeping something that can only hurt, by making noise when you expected it to be silent.
If you do use it, set it to the device that it actually is, and not Default.
I've attached the screenshot og "advanced audio properties"
That looks fine too. If you have a meter, then you should have audio in the recording.
Is anyone aware of why some devices can get sound perfectly and others not. For instance we have a handful of IPhone users/android users who are unable to hear sound from Facebook or YouTube. Is this device related?
Phones often have a single speaker, and so they mix a stereo soundtrack to mono before playing it. That can result in silence, while a device that actually does have two speakers works just fine, if the soundtrack was recorded badly.
The way that happens is usually because of a poorly understood wiring adapter, and not understanding analog audio standards at all:
- Balanced Mono uses three wires for one signal. It subtracts the two signal wires, and takes that *difference* as the intended signal. It's intended to pick up noise equally on both, because it can't be avoided, while the sending end enforces that difference, however it wants to. Taking that difference causes the noise to cancel out, which makes it work for long runs.
- XLR connector:
- (X) Shield (ground)
- (L) Live (positive signal)
- (R) Return (negative signal)
- TRS connector:
- Tip (positive signal)
- Ring (negative signal)
- Sleeve (ground)
- Unbalanced Stereo uses the same three wires for two signals. It takes each one by itself as the intended signal, noise and all, because there's nothing to tell it what that noise is.
- TRS connector:
- Tip (left signal)
- Ring (right signal)
- Sleeve (ground)
- And for completeness, Unbalanced Insert is on every professional analog audio console, and allows you to stick some external processing in the middle of the console's own processing, hence the name "insert". It has a switch built into the jack, that connects the input and output together when there's no plug.
- TRS connector:
- Tip (send)
- Ring (return)
- Sleeve (ground)
If you blindly adapt one to another without understanding what you're doing, you can easily end up with one standard trying to feed another, and wondering why it's acting weird. Especially since all three use the exact same TRS connector! ("headphone plug") So if you use TRS at all (which is still everywhere), you especially need to know what you're doing *for yourself*, and not just plug stuff together that fits.
In potentially both of your cases, you might have a balanced mono source, like maybe an XLR mic or the output of an audio console, feeding an unbalanced stereo input to your camera or computer. The mic or console happens to feed both wires equally, with opposite signals. It doesn't have to - a lot of gear only feeds one wire, and just holds the other loosely so that it picks up the same noise, and that works too - but this one does feed both equally and opposite.
That appears on a stereo meter as the same on both sides, and even gets all the way to the recording and/or stream, if you keep it stereo all the way through the production. But those two signals that appear identical and even sound identical, are actually opposite. So when they're mixed together to make a mono signal, they cancel, and you get silence.