On Wed, 10 May 2000, Ian Carr-de Avelon wrote:
> David.Woodhouse@mvhi.com Wrote:
> >avelon@emit.pl said:
> >The original driver produced by Michael Beck used major 13. It was changed
> >some time ago to register with the modular sound system as Yet Another
> >Sound Card, and hence to be on major 14 with all the other sound card
> >drivers.
> Minor point:- What if I want both? This is not too artificial as one of
> the things that has occured to me is that it should be possible to play
> a test signal via the PC speaker, record that with a sound card and analyse
> the recording to design a filter to add a lot of correction. I think part
> of the general problem with the speaker driver is that progresively smaller
> cheaper speakers have been put in by the makers, so generally only older PCs
> give something approaching AM sound.
Most computers that I saw have a small nice speaker (the sort you could
see in radios couple decades ago). The problem however is not with speaker
but with the way it is driven (on and off if I remember correctly).
That is the speaker can either be told to emit a square wave at a certain
frequency (which is used for beeps) or you can drive that square wave with
cpu. Hence unlike sound cards that have from 256 to 65536 gradations (or
more) pc speaker has 2.
Vladimir Dergachev
>
> >
> >> Is there any chance of geting PC speaker support into the stable
> >> kernel distribution? It appears to me that the number of PCs which
> >> have this feature warent it.
> >
> >It's been submitted to Linus on a couple of occasions. There was never a
> >response, although rumour has it that he's not happy with the timer
> >handling - a cleaner way of obtaining the 8253 timer would be to shift the
> >system timer to use the RTC, making HZ a power of two in the process.
> If we stick with grabing the present timer and get an interupt 8000
> times a second, why not pass control to the kernel's interupt handler
> only every 80th time, so it still receives 100Hz?
> >
> >avelon@emit.pl said:
> >> In providing a place mark in the source tree, a driver working only
> >> with the standard hardware would in any case allow unofficial patches
> >> to remain useful for much longer than is the case at present
> >
> >As far as I'm aware, the patch for 2.2 hasn't been broken for some time. I
> >haven't yet bothered to check it with 2.2.15. Someone ported it to 2.3 too
> >- I'm less sure of the status of that, but I really ought to pick it up and
> >start making sure it's OK.
> I didn't actually find linux-patches.rock-projects.com until I started
> looking through this group's FAQ. I see that the 2.0 and 2.3 patches
> are not there, not good if that site is meant to be an authoritative one
> which we are all awair of.
> The latest Sound-HOWTO still reads:
> " The software, which has not been updated for some time, can be found
> at ftp://ftp.informatik.hu-berlin.de/pub/Linux/hu-sound/."
>
> I get 9 Hunk FAILEDs patching 2.2.15 with patch-pcsp-soundcore-2.2.13.
> Maybe there is a better version of patch out there? This is vanilla
> Slackware 7.0
> IMHO this really looks like Linux shooting itself in the foot here. CDs
> with dissinformation are coming off the press every day. Anyone starting
> into Linux has to be able to make an Internet connection and compile
> a kernel before they can get a standard PC to wistle a tune. Time of a
> skilled person made available to make Linux better is used to work out
> where those hunks have to go now, when they would have simply been there
> if this driver were part of the standard kernel tree.
> In a nutshell end users are for 99% not getting something which is available,
> and lots of people's time is being wasted. We should not underestimate
> the importance of these issues.
> Yours
> Ian
>
>
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