M747 Motherboard With Onboard Soundcard Mic In Problem

[Gary Jackson]

I've found the sound in this motherboard to be excellent in every
respect, except...

The volume on mic-in is way too low. All volume controls for recording
through mic-in are set at max and still you can hardly hear it. I'm
using Win98SE.

JP10 (microphone type selector) jumper is set to "default", i.e. no
jumper across the two prongs. Can anyone say whether setting it to
"special" may improve things? I'm currently using my second PC mic, a
creative SD-50, which is slightly louder than the last one I tried,
but atill way too low.

Thanks

Gary

[George Macdonald]

On 1 Jul 2003 10:45:23 -0700, gary.jackson@my-generation.org.uk (Gary
Jackson) wrote:
I've found the sound in this motherboard to be excellent in everyrespect, except...The volume on mic-in is way too low. All volume controls for recordingthrough mic-in are set at max and still you can hardly hear it. I'musing Win98SE.JP10 (microphone type selector) jumper is set to "default", i.e. nojumper across the two prongs. Can anyone say whether setting it to"special" may improve things? I'm currently using my second PC mic, acreative SD-50, which is slightly louder than the last one I tried,but atill way too low.

It's likely that the mic-input is designed for a cheap condenser type
microphone with a relatively high output. I had a similar prob when I got
a "better" mic - the sound card would only work with the low cost mic which
came with it and I couldn't find a "good" mic with a suitably high output.
I didn't look too hard though. Does the sound card doc say what the jumper
does as far as impedance and gain? Why not try it in "special"?

Rgds, George Macdonald

"Just because they're paranoid doesn't mean you're not psychotic" - Who, me??

[Gary Jackson]

fammacd=!SPAM^nothanks@tellurian.com (George Macdonald) wrote in message news:<3f022131.50008219@news.tellurian.com>...
It's likely that the mic-input is designed for a cheap condenser type microphone with a relatively high output. I had a similar prob when I got a "better" mic - the sound card would only work with the low cost mic which came with it and I couldn't find a "good" mic with a suitably high output. I didn't look too hard though. Does the sound card doc say what the jumper does as far as impedance and gain? Why not try it in "special"?

Thanks George I will. All I've got to do now is track down a fitting
to go across the two pins of the jumper!

Gary

[Gary Jackson]

gary.jackson@my-generation.org.uk (Gary Jackson) wrote in message news:<8df55c8f.0307020944.3d5e0b44@posting.google.com>... fammacd=!SPAM^nothanks@tellurian.com (George Macdonald) wrote in message news:<3f022131.50008219@news.tellurian.com>... It's likely that the mic-input is designed for a cheap condenser type microphone with a relatively high output.

Well, I've now closed the jumper and the effect is that no mic works,
but I do get a background hum if I connect the cheap condenser type
mic.

Is there anything else I need to look at, like BIOS?

Gary

[Franc Zabkar]

On 1 Jul 2003 10:45:23 -0700, gary.jackson@my-generation.org.uk (Gary
Jackson) put finger to keyboard and composed:
I've found the sound in this motherboard to be excellent in everyrespect, except...The volume on mic-in is way too low. All volume controls for recordingthrough mic-in are set at max and still you can hardly hear it. I'musing Win98SE.JP10 (microphone type selector) jumper is set to "default", i.e. nojumper across the two prongs. Can anyone say whether setting it to"special" may improve things? I'm currently using my second PC mic, acreative SD-50, which is slightly louder than the last one I tried,but atill way too low.ThanksGary

The typical electret/condenser mike has a 3.5mm stereo plug whose
segments are wired as signal (tip), DC bias (ring), and earth. Some
"special" mikes expect both the bias and signal on the tip, hence a
shorting link is provided.

In any case, if your mainboard uses the same sound chip as mine, ie
the C-Media CM8330, then you are fighting a lost cause.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.