Date: Fri, 12 Aug 2011 21:39:21 +0200 From: Polytropon <freebsd@edvax.de> To: Gary Kline <kline@thought.org> Cc: freebsd-questions@freebsd.org Subject: Re: library with click built-in? Message-ID: <20110812213921.6cfdfa89.freebsd@edvax.de> In-Reply-To: <20110812192745.GA15543@thought.org> References: <20110812192745.GA15543@thought.org>
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On Fri, 12 Aug 2011 12:27:48 -0700, Gary Kline wrote:
> I only use my FreeBSD computer as a server; it isn't even hooked
> up to my speakers, so there is no way of testing anything i write
> that involves sound. So.... does anybody know if any other toolkit
> outputs audio?
There are two means:
The first one is the echoing of the ^G (BEL) character, 0x07
which is handled by the text mode console or terminal emulators
like xterm. In X, the sound that will be produced can be
controlled with a xset setting.
xset [-b] [b {on|off}] [b [volume [pitch [duration]]]]
See "man xset" for details.
The other one is the system speaker. If you have "device speaker"
in your kernel, you can access /dev/speaker (if the permissions
are set properly, see /etc/devfs.conf for an example. Using
the "note language" known from several BASIC dialects for
microcomputers, you can easily create sounds for that. A list
of the "note language" is in "man 4 speaker".
Here's a small example:
#!/bin/sh
read -p "CW ===> " TEXT
echo ${TEXT} | morse | awk '{
if(length($0) == 0)
printf("P4\n");
else {
gsub(" dit", "P32L32E", $0);
gsub(" di", "P32L32E", $0);
gsub(" dah", "P32L8E", $0);
printf("%sP16\n", $0);
}
}' | dd bs=256 of=/dev/speaker > /dev/null 2>&1
NB: The timing is slightly out of proper relation. :-)
--
Polytropon
Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...
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