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Date: Thu, 12 Mar 1998 18:12:19 +0900
From: Kouichi Hirabayashi <kh@mogami-wire.co.jp>
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Subject: [FreeBSD-users-jp 25826] Re: Volume of PC/AT speaker
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>$B<B:]$K%*%7%m%9%3!<%W$G3NG'$9$k$[$&$,4V0c$$$J$5$=$&$G$9!#(J

$BIT@:$;$:$K<B:]$NGH7A$r3NG'$7$F$_$^$7$?!#@h$[$I$N?dB,$O@5$7$$$h$&$G$9!#(J
$B$b$&0lEY@0M}$9$k$H!"<!$N$h$&$K$J$j$^$9!#(J

$B%9%T!<%+!<$K$h$k(J Bell $B=PNO$O!V(J\033[=<pitch>;<duration>B$B!W$N%(%9%1!<%W(J
$B%7!<%1%s%9$G;XDj$7$?(J pitch $B$H(J duration $B$NCM$r4p=`$K$7$F!"(J

  $BJ}7AGH=PNO$N<~GH?t(J = 1193180 / pitch (Hz)
  $B;}B3;~4V(J = duration * 0.1 (S)

$B$G$9!#=i4|CM$O!"$=$l$>$l(J 1.5KHz $B$H(J 50 mS $B$K$J$j$^$9$,!"%G%P%$%9%I%i%$%P(J
$B$NCf$G9M$($k$H$-$O!"%(%9%1!<%W%7!<%1%s%9$N(J duration $B$NCM$r(J 10 $BG\$7$F$+$i(J
$B;H$$$^$9$N$G!"Cm0U$,I,MW$G$9!#(J

$BJ?NS9@0l(J
