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From: "Udo Giacomozzi" <udo_giacomozzi@rolmail.net>
To: <alsa-user@alsa.jcu.cz>
Subject: Re: Recommendation for ALSA compat non-CreativeLabs PCI sound card?
Date: Fri, 12 Feb 1999 18:44:00 +0100
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>:The SB Live! package claims that the Live! is fully compatible with the SB
>:PCI standard (I think the SB 128 is a PCI card?). Why can't I use the SB
>128
>:driver for the Live! (it just don't works).
>
>
>I'm afraid the chipsets are totally different. IMHO, SBLive uses EMU10K1
>(...) while SB64 & 128 use 1370 and 1371... Am I right ?

Yes that's true.

>:However, why are all other SB cards supported by Linux? Aren't they
covered
>:by an NDA too?
>
>No... Maybe newest technologies are "protected" by keeping NDA on specs...

Hmm. Some time ago I asked creative about the full duplex mode of the SB
VIBRA16X card and had to sign an NDA.

>
>:BTW, what do you mean with 3ms latency? recording->playback latency? That
>:would be perfect as I am working on a realtime soundapp! :-)
>
>
>Yes... I remember we discussed these issues before... I was suggesting you
>drop Windows... And I am certain (more than ever) that Windoze is crappy
for

Yes. You're right. :-) I have decided to support both Linux (primarily) and
Windows (secondarily). I heard so much good things about Linux so I have
bought SuSE 5.3 to see if I am able to program under that platform. GTK
seems a good X-package that works under Windows too (have still to check it
out), so it should be no problem to program for Linux and Windows (there is
absolutely no problem for the sound-routines part).
I have tried out and found out that it's impossible to get under 100 ms
latency under Win95...

>that. Italian people seem to be very keen of software fx progs, I just

Why only Italian people? ;-) However I try to get under 15 ms latency at
least (as far as I know the ear can distinguish only 30 ms)



>
>So, yes, I think Linux/ALSA with AudioPCI could be a good solution. If
>you're looking to code an audio filter (as low latency as possible), you
>should check latency.c in alsa_utils. Its a piece of code Jaroslav has
>written to test latency but I thnik it can be easily tweaked to add fx to
>audio buffers.

I haven't (yet) tried out the ALSA drivers. Sorry, but could you explain me
why there are two (if not more) different sound systems (OSS, ALSA) under
Linux. What are the differences?


I plan however to support both ALSA and OSS in my program.

Regards
Udo Giacomozzi

--
* Email: udo_giacomozzi@rolmail.net
* UIN: 17745247   (@pager.mirabilis.com)




