Audio hisses on wake SP7 i7

[adrianplambert]

I get a hiss from the speakers when waking the laptop which continues until I trigger some other sound. At which point there is a loud click from the speakers, then the audio system behaves normally until the sleep wake hiss cycle. Is this just me?

Edit: I'm using Monterey 12.5.1

[xealstorm]

I have the same on my Monterey i7 SP7.

[WinkeyLin]

The same on i5 SP7 Monterey 12.6.5 with the latest release of EFI.

[szsong]

same here, SP7 i7, running Ventura with latest release of EFI

[f-1-0]

I found that setting bit depth to 24 and sample rate to highest available in audio-midi-setup made it disappear. (takes re-boot)

[badstorm]

Since the conversation is dated I am closing the issue and moving it as a conversation.

[f-1-0]

btw re-setting the bit depth etc as suggested in december did not solve this.
Our layout-ID seems to be quickly copied from layout ID21, as it retains the typo in <key>PathMapID</key><integer>212</integer> (should be 35 or 21 respectively)
I also suspect the hissing has something to do with these values in platforms35.xml <key>MuteInputAmp</key><false/>

<key>PublishMute</key>
<false/>
<key>PublishVolume</key>
<true/>
<key>VolumeInputAmp</key>
<false/>

However I failed to properly built a modified AppleALC.kext to try it out.
Perhaps original maker of this layout ID @jackjack1-su can help?