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

jordan muscott linux-audio-user@music.columbia.edu
Tue Oct 7 17:51:01 2003


Rick Taylor wrote:

>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?
>
Hmm, I was dreading the problem could be here:

AOpen AX3S Pentium III Celeron Socket 370 133MHz 4x AGP ATX Motherboard.

Thats what it sais on the box anyway.

>
> 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?
>  
>
Yeah I do need the scsi because my only hard drive is plugged into it ;=)
I have no idea why nothing is mapped to 3, 5, or 7. I don't think any 
IRQs are blocked or not enabled, but I've never done any fiddling with 
IRQs before so I could be missing something. I don't remember my bios 
offering me the ability to change anything here... I'll have another 
look next time I boot though.

Thanks,
 Jordan.