[Lancaster] Problem recording sound

[Ken Hough]

Wayne, et al,

WRT my problem with an on-board sound card:

After a lot of testing and playing with the various channels on KMix, I'm now 
fairly sure that the sound card is duff! I have attached an image file of an 
attempt to record sound via this card using Audacity.

You will see that no sound is recorded on the lower channel. That on the upper 
channel is nothing but noise. Also, you will see that there is a 
positive 'DC' (?) offset on both channels which switches on and off as I 
enable/disable the corresponding Capture channel on KMix.

As I stated previously, this problem is happening under Debian on my main 
desktop PC. I have similar problems when running under Win XP.

I've now run Kmix/Audicity on an old Athlon box under Debian with a 
Sounblaster Live PCI card. This works just fine, so I don't think that I'm 
missing anything relating to Debian, KMix and Audacity.

I have a spare PCI sound card, but my problem mobo (ASUS P5K SE/EPU) has only 
two PCI slots which are taken up with a PCI parallel port card (no on-board 
parallel port) and a Hauppauge Win TV digital TV card.

I could buy a PCI Express sound card (3 spare PCI e slots), but this wouldn't 
be cheap.

SO.......I've decided to go for a replacement mobo (ASUS P5Q SE2) which will 
cost about the same as a PCI e sound card. This mobo has 3 ordinary PCI slots 
and an on-board sound card. Should the on board sound card fail, I would 
still have room for a plug-in card in the third PCI slot.

Ho hum!  That's life!

Ken Hough

On Tuesday 12 January 2010 17:36:30 Wayne Ward wrote:
> Yes i had the same problem and had to switch it in on the kmix -. recording
> side another  quick test
>
> alsamixer from a terminal you can see if line in volumes are up and see if
> its un-muted
>
> what sound card are you using..
>
> also did anyone find any cheap speakers for andys demo or shal we just line
> it into a laptop ..
>
> regards
> wayne
>
> On 12 Jan 2010, at 16:42, andy baxter wrote:
> > Ken Hough wrote:
> >> I hope that one  (or more?) of you guys can help me with a problem that
> >> I'm having with my desktop Debian Lenny setup.
> >>
> >> I have no problems in playing wave files via the likes of 'audacity',
> >> streaming sound off the Internet (eg Classic FM) via Konqueror/Mplayer,
> >> and playing CDs/DVDs and digital Radio/TV via Kaffeine.
> >>
> >> However,  I cannot get audacity or anything else to pick up and record
> >> sound from any of these sound sources. I use KMix and have played with
> >> all of the available channels.
> >>
> >> My old Thinkpad T42 laptop running SUSE v11.1 has no trouble in doing
> >> this.
> >>
> >> What am I missing?
> >
> > Have you looked at the switches as well as the channel volumes in
> > alsamixer or kmix? I know some sound cards have a switch for turning the
> > internal mic on and off, so this might be what is missing.
> >
> > also, look at you /dev/snd . Mine looks like this:
> >
> > andy at monkey:~$ ls /dev/snd
> > by-path  controlC0  hwC0D0  pcmC0D0c  pcmC0D0p  pcmC0D1p  seq  timer
> >
> > if there is an entry starting 'pcm' and ending 'c' (for capture), then
> > you should be able to record sound from that device.
> >
> > andy
> >
> >
> >
> > _______________________________________________
> > Lancaster mailing list
> > Lancaster at mailman.lug.org.uk
> > https://mailman.lug.org.uk/mailman/listinfo/lancaster
>
> Wayne Ward
>
> www.lancasterlug.org.uk
> wayne at lancasterlug.org.uk
> 07957448652
>
> Lancaster Linux User Group.
>
>
>
>
> _______________________________________________
> Lancaster mailing list
> Lancaster at mailman.lug.org.uk
> https://mailman.lug.org.uk/mailman/listinfo/lancaster


-------------- next part --------------
A non-text attachment was scrubbed...
Name: snapshot2-small.jpg
Type: image/jpeg
Size: 26271 bytes
Desc: not available
Url : http://mailman.lug.org.uk/pipermail/lancaster/attachments/20100114/9bbdf534/attachment-0001.jpg