[linux-audio-user] audiophile 2496 - spdif in

Rick Taylor linux-audio-user@music.columbia.edu
Mon Oct 6 20:54:01 2003


On Sun, 05 Oct 2003 18:15:21 +0100
jordan muscott <morsecode@blueyonder.co.uk> wrote:

>Im really sorry about the volume of nonsense here :(
>
>Slackware 9.
>PIII 866
>alsa 0.9.7
>
>Has anyone succesfully recorded via the spdif input on this card using 
>arecord? I'm getting lots of 'overuns' which result in jumps when I 
>playback the resulting file. I've just built a new kernel with low 
>latency but this has made no difference at all. For example:
>
>[jordan@bootsy new]$ arecord -f dat -D spdif 909track.wav           
>Recording WAVE '909track.wav' : Signed 16 bit Little Endian, Rate 48000 
>Hz, Stereo
>overrun!!! (at least 0.090 ms long)
>overrun!!! (at least 0.030 ms long)
>overrun!!! (at least 0.061 ms long)
>overrun!!! (at least 0.030 ms long)
>
>This doesn't look ideal to me either:
>
>[jordan@bootsy jordan]$ cat /proc/interrupts
>           CPU0      
>  0:      98023          XT-PIC  timer
>  1:       1556          XT-PIC  keyboard
>  2:          0          XT-PIC  cascade
>  8:          1          XT-PIC  rtc
> 10:     108365          XT-PIC  eth0
> 11:      14874          XT-PIC  aic7xxx, ICE1712
> 12:      27245          XT-PIC  PS/2 Mouse
> 15:          2          XT-PIC  ide1
>NMI:          0
>LOC:      97983
>ERR:          0
>MIS:          0
>
>If I use the nvidia drivers for my graphics card then nvidia appears on 
>irq 11 as well. My bios doesn't look like it supports setting irqs, and 
>I tried switching the slots that my ethernet card (eth0) and my sound 
>card are plugged into but they still appear on the same irqs.
>
>Any help or pointers would be much appreciated. Even if someone just 
>sais "no, it doens't work for me either", then at least I'll know that 
>I'm not the only person who has wasted money on this card :=(

 :} Them great big cards is called "motherboards".

 Does yours have any distinguishing features? ...Maybe a brand name or model
number?

 Any IRQs blocked or not enabled?  Can you at least reserve any of them?
Which slots are shared, do you need the SCSI? What's mapped to 3, 5 and 7,
etc? Why is nothing mapped to 3, 5 or 7?