Qu-32 USB-B Streaming Produce Robotic Noise

[KeithJ A&H]

As Mike C says, the first thing to do is ensure the firmware is up to date. There were some changes in V1.95 to USB-B which help with many of the previously problematic USB host drivers.

If this doesn’t solve the issue, and you are on a Windows PC, please check out the following article which includes information on possible reasons for the problem and tools to check the system is suitable for real-time audio.
https://support.allen-heath.com/Knowledgebase/Article/View/1002

And if all else fails, please contact us using support.allen-heath.com and we’ll be happy to run through your system with you to try and figure out the root cause.

Thanks,
Keith.

[Anonymous]

Ok so here’s an update…..of sorts.
The firmware was 1.94 so I upgraded it to 1.95.

Previously the desk was only used for recording the direct outs from the GL desk and this time I plugged in the QU to the main PA.
Using the ‘Alt Out’ TRS sockets I found that this electrical buzzing noise was actually coming through the PA but only when the QU-Drive was being read or playing multitrack.
The noise did not come through the headphones socket or the main XLR outputs or the Mix outputs.

This was a slightly different noise and it reminds me of the electrical interference when a phone was placed near speakers.

Now I’m really unsure of what to do. I don’t want to push this venue to use the QU if there are these issues.

[Mike C]

Are you using a balances TRS connection on the ALT OUT 1/4 inch jacks?

What happens if you use the main L R XLR outputs to drive the main PA?

[Author]

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