[Mplayer-users] Audio problem: it has 'wheezing' artifacts

Nick Kurshev nickols_k at mail.ru
Fri Jun 8 16:00:17 CEST 2001

Hi, Alex Kanavin!

On 2001-06-08 13:01:46 you wrote:

>> I have almost same configuration:
>> S3VirgeDX-PCI + SB16PnP + Duron-750 + 256RAM
>> I use mplayer with SDL output: -vo sdl. And it works for me in real-time
>> with 600x400 (4:3) 48000 DivX-MPEG4 streams.
>Well, maybe your souncard uses 16bit DMA channel that allows for crisp
>sound, while mine only has 8bit DMA. Or you're using a smaller
>resolution/refresh rate than me. Or your motherboard is able to allocate
>necessary bus bandwidth to both SB16 and Virge, while mine isn't. I don't
I use screen resolution - 640x480x24bit color. About sound: imho SB16 contains the word "16"
even in its name and should have 16-bit DMA channel. It's very strange that your audio lacks
such channel.
My motherboard is very cheap - Acorp 7KTA (which can works stable only with 200Mhz
on cpu bus - non overclockable), but has ISA slot for my soundcard.

>> A-V resync problem was in mplayer but it seems that Arpi've fix it.
>> At least it don't occur for me now (I use mplayer from CVS).
>> But when I try to run any windoze player under my NT4.0 then
>> they can't play me in realtime even 320x200 stream with sound.
>Weird. When I did have NT 4.0 on my machine (not anymore) I was able to
>play everything. Microsoft did not yet "innovate" asf/wmv crap back then,
>but mpeg-1 were played fine.
My NT can play everything in real-time only with NVidia video - probably good nt-drivers.

>> But if you look at /usr/src/linux/Documentation/sound/ then you can
>> find there that 16-bit DMA channel can be only >= 5 but not 3
>> (Althrough 3 is present there in one sample).
>I know. Time to buy better hardware, it seems.

Best regards! Nick (2001-06-08 13:51:45)

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