Very Computer

Hi all:

I've just configured my sondblaster under Linux 2.2.3.

I compiled kernel with sound support as modules.

I added to conf.modules:

alias sound sb
parameters sb io=0x220 irq=7 dma=1 dma16=5 mpu_io=0x330

When I do modprobe sb, the modules load w/o any errors, and I hear quite
annoying hiss comming from the speakers.

The card doesn't produce *any* hissing under NT.

Any ideas? My distro is Debian 2.1 for what that matters...
Thanx,
Arcady

Don't know if Debian has sndconfig but you might give it a try. It all
depends on what kind of card it is (Vibra, Soundpro-chip?). If it is a card
with the Soundpro chip you can look at the CMI HOWTO in my signature.

Are you using isapnptools?

Regards Hans

--
        Java Search Engine Front End
    http://home.gelrevision.nl/~h.wolter/
     Linux Links/CMI8330 Soundpro HOWTO
http://home.gelrevision.nl/~h.wolter/linux.htm

|> >Hi all:
|>
|>
|> >alias sound sb
|> >parameters sb io=0x220 irq=7 dma=1 dma16=5 mpu_io=0x330
|> >
|> >When I do modprobe sb, the modules load w/o any errors, and I hear quite
|> >annoying hiss comming from the speakers.
|> >
|> >The card doesn't produce *any* hissing under NT.
|> >
|> >Any ideas? My distro is Debian 2.1 for what that matters...

Here's an idea: when the mixer is initialised it turns on the
'line in' or mic. That would certainly produce a hiss.
If this is the case, just use xmixer or something similar to turn
it off.

/Patrik.

|> Don't know if Debian has sndconfig but you might give it a try. It all
|> depends on what kind of card it is (Vibra, Soundpro-chip?). If it is a card
|> with the Soundpro chip you can look at the CMI HOWTO in my signature.
|>
|> Are you using isapnptools?
|>
|> Regards Hans
|>
|> --
|>         Java Search Engine Front End
|>     http://home.gelrevision.nl/~h.wolter/
|>      Linux Links/CMI8330 Soundpro HOWTO
|> http://home.gelrevision.nl/~h.wolter/linux.htm

Quote:

> When I do modprobe sb, the modules load w/o any errors, and I hear quite
> annoying hiss comming from the speakers.

Try this:

reboot the system. At the lilo boot: prompt, assuming your boot image is called
Linux type the following:

boot: Linux append="no-hlt"

Reload the modules and see if the hissing goes away.  If it does, it is likely
caused by the cpu coming in and out of "halt on idle" ... probably due to
network traffic appearing at the ethernet (or it could be caused by speaker
cables too near your video or network cables). Do you also hear the hissing
when you move the mouse?

Anyhow, if that fixes it ... live with it if you can because running the
machine in this mode makes the CPU a lot hotter and the machine less stable.

I had a similar problem until I used a mixer program to turn up the
volume on the output, no more hiss. (SB16, RedHat 5.0, NT4.0)
-diahedrial

Mine has always done that too.  It seems that the input and output gain on the
card get set to maximum when it's initialized.  If you have a mixer program that
lets you adjust the gain settings, turn them down.  You don't need them set that
high.  If, on the other hand, your card doesn't have adjustable gain, I don't
know what to tell you.  (Other than, if you hear noises that vary with what
you're doing on your computer, disable your microphone input when you're not
using a microphone.)

--
home page: http://woodstock.csrlink.net/~jshaffer

My RH5.2 setup has a command-line mixer control command that is just perfect
for initializing the sound at the end of /etc/rc.d/rc.local (the very last
thing that is run before the login prompt comes up.)  Actually I put a "play"
command in there too so the machine can make a nice hi-fi startup noise just
like UnmentionableOS.

In my machine, the cable from the CD-ROM to the sound card picks up noise,
although not terribly loud.  I also keep the microphone input muted when
not in use.

Markus

Hi all:

I've just configured my sondblaster under Linux 2.2.3.

I compiled kernel with sound support as modules.

I added to conf.modules:

alias sound sb
parameters sb io=0x220 irq=7 dma=1 dma16=5 mpu_io=0x330

When I do modprobe sb, the modules load w/o any errors, and I hear quite
annoying hiss comming from the speakers.

The card doesn't produce *any* hissing under NT.

Any ideas? My distro is Debian 2.1 for what that matters...
Thanx,
Arcady

Don't know if Debian has sndconfig but you might give it a try. It all
depends on what kind of card it is (Vibra, Soundpro-chip?). If it is a card
with the Soundpro chip you can look at the CMI HOWTO in my signature.

Are you using isapnptools?

Regards Hans

--
        Java Search Engine Front End
    http://home.gelrevision.nl/~h.wolter/
     Linux Links/CMI8330 Soundpro HOWTO
http://home.gelrevision.nl/~h.wolter/linux.htm

|> >Hi all:
|>
|>
|> >alias sound sb
|> >parameters sb io=0x220 irq=7 dma=1 dma16=5 mpu_io=0x330
|> >
|> >When I do modprobe sb, the modules load w/o any errors, and I hear quite
|> >annoying hiss comming from the speakers.
|> >
|> >The card doesn't produce *any* hissing under NT.
|> >
|> >Any ideas? My distro is Debian 2.1 for what that matters...

Here's an idea: when the mixer is initialised it turns on the
'line in' or mic. That would certainly produce a hiss.
If this is the case, just use xmixer or something similar to turn
it off.

/Patrik.

|> Don't know if Debian has sndconfig but you might give it a try. It all
|> depends on what kind of card it is (Vibra, Soundpro-chip?). If it is a card
|> with the Soundpro chip you can look at the CMI HOWTO in my signature.
|>
|> Are you using isapnptools?
|>
|> Regards Hans
|>
|> --
|>         Java Search Engine Front End
|>     http://home.gelrevision.nl/~h.wolter/
|>      Linux Links/CMI8330 Soundpro HOWTO
|> http://home.gelrevision.nl/~h.wolter/linux.htm

Quote:

> When I do modprobe sb, the modules load w/o any errors, and I hear quite
> annoying hiss comming from the speakers.

Try this:

reboot the system. At the lilo boot: prompt, assuming your boot image is called
Linux type the following:

boot: Linux append="no-hlt"

Reload the modules and see if the hissing goes away.  If it does, it is likely
caused by the cpu coming in and out of "halt on idle" ... probably due to
network traffic appearing at the ethernet (or it could be caused by speaker
cables too near your video or network cables). Do you also hear the hissing
when you move the mouse?

Anyhow, if that fixes it ... live with it if you can because running the
machine in this mode makes the CPU a lot hotter and the machine less stable.

I had a similar problem until I used a mixer program to turn up the
volume on the output, no more hiss. (SB16, RedHat 5.0, NT4.0)
-diahedrial

My RH5.2 setup has a command-line mixer control command that is just perfect
for initializing the sound at the end of /etc/rc.d/rc.local (the very last
thing that is run before the login prompt comes up.)  Actually I put a "play"
command in there too so the machine can make a nice hi-fi startup noise just
like UnmentionableOS.

In my machine, the cable from the CD-ROM to the sound card picks up noise,
although not terribly loud.  I also keep the microphone input muted when
not in use.

Markus

Hi all:

I've just configured my sondblaster under Linux 2.2.3.

I compiled kernel with sound support as modules.

I added to conf.modules:

alias sound sb
parameters sb io=0x220 irq=7 dma=1 dma16=5 mpu_io=0x330

When I do modprobe sb, the modules load w/o any errors, and I hear quite
annoying hiss comming from the speakers.

The card doesn't produce *any* hissing under NT.

Any ideas? My distro is Debian 2.1 for what that matters...
Thanx,
Arcady

Don't know if Debian has sndconfig but you might give it a try. It all
depends on what kind of card it is (Vibra, Soundpro-chip?). If it is a card
with the Soundpro chip you can look at the CMI HOWTO in my signature.

Are you using isapnptools?

Regards Hans

--
        Java Search Engine Front End
    http://home.gelrevision.nl/~h.wolter/
     Linux Links/CMI8330 Soundpro HOWTO
http://home.gelrevision.nl/~h.wolter/linux.htm