Date: Mon, 13 Dec 2004 12:03:15 -0600 From: "Kevin D. Kinsey, DaleCo, S.P." <kdk@daleco.biz> To: Nikolas Britton <freebsd@nbritton.org> Cc: freebsd-questions@freebsd.org Subject: Re: Changing hw.snd.pcm0.buffersize in 4.10. Message-ID: <41BDD963.1000502@daleco.biz> In-Reply-To: <41BDBC77.6030309@nbritton.org> References: <16829.40585.759971.425967@szamoca.krvarr.bc.ca> <41BDBC77.6030309@nbritton.org>
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Sandy Rutherford wrote:
>> Is it possible to change the sysctl variable hw.snd.pcm0.buffersize
>> (DMA buffer size for the soundcard) in FreeBSD 4.10? I know that in
>> 5.x this is changed in devices.hints. I'm guessing that something in
>> the kernel config file will do the job, but haven't been able to
>> figure out what.
>>
>> I am trying to increase the buffersize to get rid of little skips in
>> the playback, which I believe are caused by underruns.
>>
>> Thanks,
>> Sandy
>
} Nikolas Britton wrote:
} In FreeBSD 5.3 you can change the buffersize by adding
} hint.pcm.0.buffersize="foo" to /boot/loader.conf, have you try'ed this
with 4.x?
I wonder if it wouldn't be:
set hw.snd.pcm0.bufffersize=N
in accordance with other variables in /boot/loader.help.
OTOH, there was a note in
/sys/i386/isa/sound/sound_config.h
(as of March) that refers to using "make config"
to change the DSP_BUFFERSIZE constant during, I assume,
the kernel build operation. As I didn't start using
FreeBSD on the desktop until 5.2 came out, I can't
say that this is in anyway authoritative, and possibly
isn't even helpful, though....
#uptime
11:57AM up 213 days, 21:35, 1 user, load averages: 0.00, 0.00, 0.00
I think I need to go update that box ....
Kevin Kinsey
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