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Subject: [FreeBSD-users-jp 68441] Re: Q. pcm and sbc in O_RDWR
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$B4d>k$G$9!#(B

From: futatuki@bsdclub.org (Yasuhito FUTATSUKI)
Subject: [FreeBSD-users-jp 68426] Re: Q. pcm and sbc in O_RDWR
Date: Sat, 11 May 2002 19:11:57 +0900 (JST)

> > >   ISA $B$N:"$N(B SoundBlaster $B$C$FA4Fs=E$OJQB'E*$G!"JR%A%c%s%M%k$O(B
> > > 8bit $B$K@)8B$5$l$k!"$J$s$F$N$r$I$3$+$GFI$s$@5-21$,$"$j$^$9!#(B

>   $B$A$g$C$H4V0c$C$F$?$_$?$$$G$9!#(BCreative $B$N=P$7$F$k;qNA$8$c$J$/$F!"(B
> Luigi's driver $B$N(B CARDS $B%U%!%$%k$N(B SB16 $B$K$D$$$F$N%3%a%s%H$G$7$?!#(B
> 3.5-STABLE $B$N%=!<%9$N(B src/sys/i386/isa/snd/CARDS $B$h$j!#(B

$B$"!"$3$l@N!"FI$s$@$O$:$J$N$KK:$l$F$^$7$?!#(B
$B$=$l$K!":G6a$N%=!<%9%D%j!<$K$O8+$D$+$i$J$$!#!J$"$?$j$^$($+!K(B

>     this driver in capture mode or in full duplex. Documentation is
>     not available from Creative. I suggest to stay away from these
>     cards (and from SB16 in general).

snd$B$NOC$G$O$"$j$^$9$,!"$J$s$@$+!"2~A1$G$-$=$&$K$J$$$G$9$M!#(B
$B:#$N%I%i%$%P!<$G$b$=$&$J$s$8$c$J$$$+$J!"$C$F5$$,$7$^$9!#(B

>     Full duplex support of this card is tricky since one channel can
>     work in 16-bit and the other in 8-bit mode. You will need to use
>     the new set of ioctl to use separate data formats on the two
>     channels (the vat driver does this). Of course, quality in 8-bit
>     is much lower than in 16-bit.

$B@n8}$5$s$+$i$bN`;w$N;XE&$r$$$?$@$$$F$$$?$N$G$9$,!"$3$l$G>/$7M}2r$G$-(B
$B$?5$$,$7$^$9!#(B

$B$D$^$j!"(B/dev/dsp0$B$GFI$_9~$s$G(B/dev/dspW0$B$G=q$-=P$9!"$^$?$O$=$N5U$r$9(B
$B$k$N$,(BSB16$BN.:nK!$G$"$k!"$H!#$G$b:#$O(B/dev/dsp0$B$KFI$_=q$-$7$F$*$j!"$3(B
$B$l$,(Baudio device$B3&$N(BSB16$BN.GI$K$ODL$8$J$$!"$H!#(B

$B:#EY;n$7$F$_$^$9!#(B

$B!t$G$b!"JL$N%+!<%I$K$7$A$c$*$+$J!"$C$F9M$(;O$a$F$$$k:#F|$3$N$4$m$G$9!#(B
$B!t$b$&(BPCI$B%9%m%C%H$,6u$$$F$$$J$$$N$G!"(BPC$B$NGc$$49$($K$J$C$A$c$&$+$b!#(B
$B!t(BUSB$B$J$i6u$$$F$k$1$I!"(Baudio device$B$G$O$^$@;H$($=$&$K$J$$$7!#(B
---
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$B?73cBg3X(B $BBg3X1!<+A32J3X8&5f2J(B
$B4d>k(B $B8n(B (iwaki@bc.niigata-u.ac.jp)
