ascii-audio

Generates PCM audio from an ASCII string. Text is visible on the spectrogram image.

BUILDING

cd ascii-audio
make

USAGE

ascii-audio -i input\ string -f 440 -b 1000 -o audio_out.raw

You could also use it with a pipe like this:

echo ABCDEFGHIJKLMNOPQRSTUVWXYZ | ascii-audio -i -

OPTIONS

-i [input string]   (required)
-f [base frequency] (optional, default: 1000)
-b [bandwidth]      (optional, default: 1200)
-o [output file]    (optional, default: out.raw)

OUTPUT

This will generate a 48k/32-bit floating point raw PCM file. You can listen to it with SoX like this:

play -c 1 -r 48000 -b 32 -e float -t raw out.raw

Generating a spectrogram with SoX looks like this:

sox -c 1 -r 48000 -b 32 -e float -t raw out.raw -n spectrogram