Occasional Audio Glitches as USB Interface

CorOS Version: 1.0.0

Describe your issue:
Using a Mac running Big Sur and the Quad Cortex as my audio interface out to monitors, occasionally I will hear audio glitches. It seems reproducible.

Steps to reproduce your issue:

  1. Navigate to a patch that is using 76% CPU
  2. Go to youtube.com and find a video.
  3. Click around on the timeline for the video quickly, jumping from place to place.
  4. If you do this enough, you will hear the glitch.

This is only one method to reproduce it. It happens at random times, but for some reason the above steps seem to encourage it to happen.

I expected this to happen:
When I play audio using the QC as my interface, I expect to hear no glitches.

I have tried the following things:

  • I have tried updating QC

I also am receiving audio glitches which prevents me from utilizing the QC as an audio interface via USB to my Pro Tools DAW in Windows 10. Any insight on this would be appreciated, thanks!


Do you get glitches if you run QC into Another Audio Interface as if you were plugging in an instrument?

This is also happening to me with a 32% CPU patch active (not even playing, just using my computer).
I couldn’t reproduce it though, glad you found a way! :slight_smile:

I’m on Apple M1 Mac Mini (Big Sur) btw.
Cheers! :beers:

1 Like

No - this is solely while using the QC as my audio interface.


Yo, i also get occasional audio glitches when using it as audio interface. It’s like the audio goes robotic for a second or two and back to normal.

In my case it seems more severe than yours.

My setup: when not playing, I have created an empty patch where there is no input other than windows audio (thru usb obv) and output is speakers on channels 1 and 2. This minimises the QC CPU consumption at 3%.

So even in this condition of low CPU usage and simple audio streaming from YouTube or Spotify, the QC gives me audio glitches.

Additionally, from time to time,out of the blue, audio goes dead and I have to reboot the QC to hear something again.

When playing guitar I’m totally satisfied with QC.
When not playing, I regret getting rid of my good old UR22 - which never gave me a crack or glitch.


Go to the audio panel and increase the sample rate.

Try increasing the buffer size

Yeah, that’s what I ment…

1 Like

update 1.0.1 does not fix this issue on Windows 10. Audio glitches occur through pc sounds when using QC as audio interface, at every possible buffer size, and for some reason my driver is locked to 48khz and I can’t confirm if changing to 44.1 khz resolves the issue.

QC operates only at 48 Khz when used as an USB interface and as such be the master sync clock of the setup.