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Full Discussion: A simple variable frequency sinewave audio generator.
Operating Systems OS X (Apple) A simple variable frequency sinewave audio generator. Post 303035891 by MadeInGermany on Friday 7th of June 2019 04:23:53 AM
Old 06-07-2019
A suggestion for more efficiency:
Code:
# Open the file for writing via descriptor 4
exec 4> /tmp/sine.wav
{
printf "%b" "\122\111\106\106\044\000\001\000\127\101\126\105\146\155\164\040\020\000\000\000\001\000\001\000"
printf "%b" "${RATE}"
printf "%b" "\000\000\001\000\010\000\144\141\164\141\000\000\001\000"
} >&4
# Add the sinewave data, 65536 bytes in size.
DATA="Oq~qO- -"
COUNTER=0
while [ ${COUNTER} -le 12 ]
do
    printf "%b" "${DATA}"
    COUNTER=$(( COUNTER + 1 ))
done >&4
# Entire filesize 65580 bytes, 8+ seconds long for 1000[Hz]

These 2 Users Gave Thanks to MadeInGermany For This Post:
Neo wisecracker
 

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LEARN ABOUT DEBIAN

tape2wav

tape2wav(1)							     Emulators							       tape2wav(1)

NAME

       tape2wav - Sinclair ZX Spectrum tape to wav audio file converter

SYNOPSIS

       tape2wav [ -r sample rate ] infile outfile

DESCRIPTION

       tape2wav converts audio files to ZX Spectrum tape images.

OPTIONS

       -r sample rate
	      causes sample rate to be used as the sample rate for the target wav file.

       infile specifies the tape file to be converted. This file can be in any of the tape formats supported by libspectrum(3).

       outfile
	      specifies the output wav file.

BUGS

       None known.

SEE ALSO

       fuse(1), fuse-utils(1), libspectrum(3), listbasic(1), tapeconv(1), tzxlist(1), snap2tzx(1), tape2wav(1)

       The comp.sys.sinclair Spectrum FAQ, at
       http://www.worldofspectrum.org/faq/index.html.

AUTHOR

       Fredrick Meunier (fredm@spamcop.net).

Version 1.0.0							16th December, 2010						       tape2wav(1)
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