I've read that one problem with motherboard audio is "digital noise"
pickup due to exposure of the unshielded circuit to various waveforms on
the motherboard. On laptops I've measured noise levels on the headphone
output as high as -30dB.
Rob
On Wed, 8 Jan 2014, Alan Peterson wrote:
From Rob Landry:
"It's a pity the sound cards built into current motherboards don't have
better specs. If they did, I'd be happy to make my own differential
input/output boards."
---------------------------------
And that's really too bad. C-Media, which makes a lot of the audio chips found on mobos,
has decent audio specs on a lot of their pieces. So much so that the ASUS folks make a
high-end (consumer) PCI-Express card called the Xonar Essence STX, which is built around
a C-Media chip. It depends on the PC's CPU to handle the processing, but that's only if
you want to use the cartoony features (voice changer, "environmental" ambience
and reverb, etc). As a straight-ahead sound card, its pretty good.
There are a lot of companies making those on-board audio chips -- Crystal, VIA,
Realtek and others -- some better than others. I agree that the quality of mobo
audio could and should be improved.
-ap
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