When using Parsec, people can hear what the host hears, which can include themselves if the host is talking to them on Discord or a similar app. Here's a list of ways the host can fix this.
Parsec Arcade Beta
Arcade shares just the game, and as part of that it will only capture the game's sound, which prevents echo. It's currently in Beta so some games might not work properly. Learn about Arcade here.
Desktop sharing (Computers tab)
There are multiple ways of fixing this on desktop sharing, shown below. The automatic cancellation is an easy solution, but in case it doesn't work or you dislike that it reduces the stream's sound when people talk, you should try something else like VB-Cable.
This is a fix for Discord that works by reducing the whole stream's sound when someone talks. The host can enable it in Parsec's settings > Host > Echo Cancelling. If you dislike that it reduces everything, or you're not using Discord, look into the other fixes in the article instead.
In case it doesn't work properly while enabled, the host can try these things:
- Restart Discord by right-clicking its icon in the taskbar and clicking Quit, then starting it again
- Ensure Standard is used in Discord's Settings > Voice & Video > Audio subsystem
- Disable any software for virtual surround sound or audio enhancing, then restart Discord and Parsec from the taskbar icons in the bottom-right
If it still doesn't work, disable Echo Cancelling in the settings and try to use something else like the VB-Cable fix in this article. The automatic fix may rarely not work, sometimes caused by complex audio setups for live streaming.
This is a consistent fix that uses a separate program, and doesn't lower the volume of the stream. You might however notice a bit of added latency. The following steps should be done by the host:
- Download VB-Cable, unzip and run the setup as administrator. Choose the correct 32 or 64-bit version for your PC.
- Press Windows + R, type mmsys.cpl and press Enter to open the sound settings
- Note down your original device which has a green checkmark (in my case it's 'Speakers'). We'll use it in the tutorial
- Click CABLE Input and click Set Default
- Go into the Recording tab
- Double-click CABLE Output. In the new window, go to the Listen tab
- Activate Listen to this device
- Set Playback through this device to your original device
- Click OK
- Modify the settings of the app you use to communicate with friends. For Discord, change 'Output device' in the Voice & Video settings to your original device
- Lastly, make sure to restart your computer right now for programs to switch to the correct audio devices
It didn't work / something is wrong
If you or the clients are unable to hear anything at all, you should double-click the original device and Cable Input, and set both to use 24 bit, 44100 Hz on Advanced > Default Format. Do the same for Cable Output, but use 2 channel, 24 bit, 44100 Hz instead. Restart your computer if nothing's changed right away.
Otherwise, it's very likely that something was set incorrectly (carefully re-check the tutorial), or the computer wasn't restarted at the end.
A different device: Remember that people hear what is in the host PC; that's why the echo exists. If the host uses Discord (or similar apps) on their phone or another device aside from the computer that is hosting, there won't be any echo on Parsec.
A different output: For example, if the host computer has a headphone and a monitor that outputs audio, they can use one for chatting and the other for everything else. With the chat separated from what Parsec captures, there's no echo.
Change output used by your chatting app
Change to another audio device in the settings of the app you use to communicate with friends. For Discord, change 'Output device' in Voice & Video.
Change speakers used by everything else
- Press Windows + R, type mmsys.cpl and press Enter to open the sound settings
- Select the one you want and click Set Default
- Restart your PC in case things don't start using the device you set
