Distortion When Using Voicemeeter Potato and Thetis

[n2gq]

Distortion When Using Voicemeeter Potato and Thetis and a Presonus 68c.

The buzzing sound is on audible when using voicemeeter potato. If I just use Presonus studio 68c and CM audio route and set the driver "Studio USB ASIO Driver" all is fine. Started sometime this year but did not have time to deal with it.
Equipment is as follows:
Anan-7000del mkIII
Presonus 68c
Windows 11 pro 24H2

[n2gq]

It seems to happen when I open an app over the Thetis window. Spectral warning Leds go red and the other yellow. Maybe related to display somehow.

[K1LSB]

Jay,

You haven't given us any information at all about your Thetis configuration or your Voicemeeter configuration or your computer configuration (including hardware and all of the apps you have running while you're experiencing the buzzing).

Without any of that information there's no one here who can help you determine what the problem is.

Mark

[w-u-2-o]

It seems to happen when I open an app over the Thetis window. Spectral warning Leds go red and the other yellow. Maybe related to display somehow.

This is the critical bit of information that was missing.

The problem is that your CPU is not keeping up with the real-time requirements of the spectral display, and apparently not the audio stream, either.

Lower your spectral display update rate to the point where nothing you do on the PC at the same time as running Thetis causes the red or yellow indicators on the spectral display.

The Vsync option should automatically sync Thetis to the Windows defined display update rate (typically 60Hz, sometimes 30Hz, etc.).

Just out of curiosity:

- What is your current display update rate in Thetis?
- What is the display update rate set to in Windows?
- What does your CPU load look like? Use Task Manager, Resmon or Process Explorer, do not use Thetis to measure this number.
- Have you confirmed that the Presonus is running at 48KHz using the Presonus Universal Control app?
- Have you assigned the Presonus as the A1 hardware output in Voicemeeter?
- Are all Voicemeeter devices listed in the Windows Sound Control Panel > Advanced Properties explicitly set to 48KHz?

[n2gq]

Here is config. AMD Ryzen 9 5900XT 16-Core Processor (3.50 GHz) 64gb ram

thetis display config.png (6.23 MiB) Viewed 148 times

thetis display config 2.png (337.32 KiB) Viewed 148 times

[w-u-2-o]

Step 1: While your monitor might happily run at 144 frames per second, the "real-time" code in Thetis almost certainly won't. If your monitor really is running at 144Hz (nice gaming monitor?) you might try 72Hz in Thetis (half the monitor rate). 60Hz is certainly more than adequate to achieve a smooth spectral display. Even 30 works well.

BOTTOM LINE: you want NO spectral warning indications, EVER.

Step 2: use cmASIO to connect to Voicemeeter. Then you don't need to worry about any VAC settings and latency will be as low or lower than any other method.

With the excellent Presonus interface, and that ripping fast Ryzen 9 16-core processor, once you do the above two steps you should have near ZERO problems with audio and RF signal quality.

Thetis likes a lot of cores, which you have, doesn't need a ton of RAM, which you have, and doesn't care about mass storage speed. Nevertheless, because all the Thetis DSP is done in the CPU, as opposed to the GPU, it is all too easy and tempting to run too high a frame rate with modern, high refresh rate, gaming monitors.

[n2gq]

Hi,
So far, the refresh rate 30, 60 or 144hz made no difference. Then I turned off re-size bar and reduced resolution down to 1440p (2k) from 2160 (4k) And that stopped the problem. This only happens when using potato.

[n2gq]

- What is your current display update rate in Thetis? 144

- What is the display update rate set to in Windows? 144

- What does your CPU load look like? Use Task Manager, Resmon or Process Explorer, do not use Thetis to measure this number. When it buzzes still look normal, no excess load
- Have you confirmed that the Presonus is running at 48KHz using the Presonus Universal Control app? Yes 48khz
- Have you assigned the Presonus as the A1 hardware output in Voicemeeter? yes
- Are all Voicemeeter devices listed in the Windows Sound Control Panel > Advanced Properties explicitly set to 48KHz? yes all 48khz

[n2gq]

Hi,
So far, the refresh rate 30, 60 or 144hz made no difference. Then I turned off re-size bar and reduced resolution down to 1440p (2k) from 2160 (4k) And that stopped the problem. This only happens when using potato.

Distortion back for a shorter time using 1440p and re-size off. So not a solution.
Going to try sonar if possible. Don't know if sonar is porting asio.

[w-u-2-o]

Are you using cmASIO?

Something else is wrong. The size of the Thetis window and the resolution of the monitor should not matter. For instance, I can set the Thetis window to appear across all three of my triple 4K displays and it has no problem with either VAC or cmASIO with Voicemeeter. I'm also using a Presonus interface.

Try reinstalling Voicemeeter. Don't forget that requires the following sequence: uninstall, reboot, install, reboot.

Try updating your video drivers.

[n2gq]

Are you using cmASIO?

Something else is wrong. The size of the Thetis window and the resolution of the monitor should not matter. For instance, I can set the Thetis window to appear across all three of my triple 4K displays and it has no problem with either VAC or cmASIO with Voicemeeter. I'm also using a Presonus interface.

Try reinstalling Voicemeeter. Don't forget that requires the following sequence: uninstall, reboot, install, reboot.

Try updating your video drivers.

Going to re-install Potato.
Re-installed but same noise.

[w-u-2-o]

Are you using cmASIO?

Have you tried updating your video drivers?

[n2gq]

Are you using cmASIO?

Have you tried updating your video drivers?

Yes, I went to AMD downloaded drivers for RX 7800xt card uninstalled restart and then installed then a restart.
Did the same for Voicemeeter had to be careful uninstalling because sometimes you have to regen a new challenge code for license. Same results
Also did the same for Presonus universal control as well as changed the device to a studio 26c just less channels. Same results.
Removed display port cable used a hdmi cable same results.
When I look at task manager all looks ok. I even tried setting app priority no change as well.
As long as I have a window that is not maximized all is ok. But while Thetis is running and I max out a window the noise comes back.
Will keep looking.