A metronome... Post: 302946023

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Operating Systems OS X (Apple) A metronome... Post 302946023 by Corona688 on Friday 5th of June 2015 05:41:45 PM

06-05-2015

Registered User

Interesting idea, it'd be more accurate to generate appropriate amounts of silence in a file and let the sound card do its own accounting of time. You could get quite high rates that way. Something like:

Code:

dd if=/dev/zero bs=1 count=${silence_bytes} > /tmp/silence.raw

while true
do
        cat /tmp/tick.raw /tmp/silence.raw /tmp/tock.raw /tmp/silence.raw
done > /dev/dsp

rm /tmp/silence /tmp/tick /tmp/tock

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LEARN ABOUT OPENSOLARIS

gen

MULTIMON(1)						      General Commands Manual						       MULTIMON(1)

NAME

       gen - program to generate test files of radio transmission modulation

SYNOPSIS

       gen [options] output_file

DESCRIPTION

       This manual page documents briefly the gen
       command.  This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page.

       multimon is a program that decodes radio transmissions, gen generates modulated files suitable for decoding with multimon.

OPTIONS

       -t <type>
	      output file type (any other type than raw requires sox).
	      allowed types: raw aiff au hcom sf voc cdr dat smp wav maud vwe

       -a <ampl>
	      amplitude.

       -d <str>
	      encode DTMF string.

       -z <str>
	      encode ZVEI string.

       -s <freq>
	      encode sine of given frequency.

       -p <text>
	      encode hdlc packet using specified text.

EXAMPLE

       Create a file /tmp/message.wav containing sound samples of packet radio message:
       gen -p "This is a message." -t raw /tmp/message.wav

       To dial a number directly to the sound card output:
       gen -d 8675309

SEE ALSO

       multimon(1)

AUTHOR

       This manual page was written by A. Maitland Bottoms <bottoms@debian.org>, for the Debian GNU/Linux system (but may be used by others).

								   June 19, 2000						       MULTIMON(1)