soxdial - generate DTMF (touchtone, dialtone, or blue box) audio

soxdial uses sox to generate DTMF tones (aka touchtone dialling),
dialtone, and/or "blue box" tones. Output can be played through the
system sound card, or saved to a file of any type supported by sox.

soxdial is a perl script that doesn't require any external
dependencies other than perl and the sox binary in $PATH.

For full documentation, run "soxdial --help".