# Channel muting when mirroring (QA403)
**URL:** https://forum.quantasylum.com/t/channel-muting-when-mirroring-qa403/1310
**Category:** Uncategorized
**Created:** [March 19, 2024, 9:24pm UTC](https://forum.quantasylum.com/t/channel-muting-when-mirroring-qa403/1310 "2024-03-19T21:24:04Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@yegolebi](https://forum.quantasylum.com/u/yegolebi)
#### Post date: [March 19, 2024, 9:24pm UTC](https://forum.quantasylum.com/t/channel-muting-when-mirroring-qa403/1310/1 "2024-03-19T21:24:04Z")
Does the generator channel mute setting also work with mirroring? maybe I am doing something wrong, but despite the mute setting both DAC channels generate the same signal…
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### Author:  [@yegolebi](https://forum.quantasylum.com/u/yegolebi)
#### Post date: [March 21, 2024, 7:24pm UTC](https://forum.quantasylum.com/t/channel-muting-when-mirroring-qa403/1310/2 "2024-03-21T19:24:35Z")
Can anyone check this issue? I’m posting the screenshot with mute left enabled - yet both channels still active
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### Author:  [@VAR](https://forum.quantasylum.com/u/VAR)
#### Post date: [March 21, 2024, 9:25pm UTC](https://forum.quantasylum.com/t/channel-muting-when-mirroring-qa403/1310/3 "2024-03-21T21:25:32Z")
Not sure what is going on with your muting, but have never seen commas where there should be periods in your data…
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### Author:  [@yegolebi](https://forum.quantasylum.com/u/yegolebi)
#### Post date: [March 21, 2024, 9:53pm UTC](https://forum.quantasylum.com/t/channel-muting-when-mirroring-qa403/1310/4 "2024-03-21T21:53:29Z")
Apparently, the application uses the decimal sign, which is defined in Windows. I am from Poland. In Polish, the decimal sign is a comma, not a period.
I have to admit that there are problems with it, especially for an engineer, programmer or computer scientist. I use the period.
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### Author:  [@matt](https://forum.quantasylum.com/u/matt)
#### Post date: [March 21, 2024, 10:53pm UTC](https://forum.quantasylum.com/t/channel-muting-when-mirroring-qa403/1310/5 "2024-03-21T22:53:28Z")
Hi @yegolebi, the muting doesn’t work with mirroring, but it can be investigated. It’s not clear if it should be handled at the Windows level (via system volume and/or balance) or at the WAV generation level.
>
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> See more detail below.
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> https://forum.quantasylum.com/t/channel-muting-when-mi…rroring-qa403/1310/4
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### Author:  [@VAR](https://forum.quantasylum.com/u/VAR)
#### Post date: [March 22, 2024, 12:11am UTC](https://forum.quantasylum.com/t/channel-muting-when-mirroring-qa403/1310/6 "2024-03-22T00:11:18Z")
Ok, I learned some Polish today… 😃
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### Author:  [@tkuzma](https://forum.quantasylum.com/u/tkuzma)
#### Post date: [August 11, 2026, 2:16pm UTC](https://forum.quantasylum.com/t/channel-muting-when-mirroring-qa403/1310/7 "2026-08-11T14:16:11Z")
@matt Any follow up on this? I’m having the same issue with QA401 and need to do some product testing with isolated left and right UAC2 audio.
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### Author:  [@matt](https://forum.quantasylum.com/u/matt)
#### Post date: [August 13, 2026, 2:38pm UTC](https://forum.quantasylum.com/t/channel-muting-when-mirroring-qa403/1310/8 "2026-08-13T14:38:49Z")
Hi @tkuzma
The muting was fixed in release [1.221](https://github.com/QuantAsylum/QA40x/releases/tag/1.221) for the QA402/QA403 in the QA40x software. it’s a fairly large change and it won’t be fixed for the QA401 as that product reached end of life some time ago.