Dasharo
Audio recording very noisy from internal mic
Component
Dasharo firmware
Device
NovaCustom V56 14th Gen
Dasharo version
0.9.0-rc7
Dasharo Tools Suite version
No response
Test case ID
No response
Brief summary
Recording from internal mic is very noisy
How reproducible
Always?
How to reproduce
- Start Fedora 40 Xfce (Live USB) (affects Qubes OS 4.2 too)
- Record with
pw-recordoraudacity, say few test words - Try to play it back
Expected behavior
Test words clearly recorded with silent background
Actual behavior
Very noisy background, even when the fan is not spinning.
Screenshots
No response
Additional context
No response
Solutions you've tried
Changing "mic boost" to 0 using alsamixer (it defaults to full) makes it better. But it's very unfriendly method, as needs to bypass pipewire/pulseaudio (needs to call alsamixer -c 0, otherwise the setting is hidden). And the setting can't be changed in normal audio volume control.
It may be possible to tweak the HD Audio codec to reduce the mic gain somewhat. Depends on access to ALC245 documentation
It may be possible to tweak the HD Audio codec to reduce the mic gain somewhat. Depends on access to ALC245 documentation
- I have asked the factory for documentation and I expect a response in about 2 weeks.
It might be also solvable(?) in Linux, take a look at function alc269_fixup_limit_int_mic_boost(), I see it applied to some ALC245 systems too. I see @mkopec already submitted some quirk for the V5xx models (about mic detection), I guess it can be extended to reduce mic boost too.
@marmarek I see your patch has been merged and landed in v6.11, thanks! https://github.com/torvalds/linux/commit/562755501d44cfbbe82703a62cb41502bd067bd1
I think this can be closed then?