That one's just ordinary DTMF. I recorded the audio, trimmed it manually and then made a spectrogram like this:
sox gun1.wav -n rate 4k spectrogram -m -y 500
The 'rate' switch is to cut down on how much of the frequency space we can see. I left the audio as stereo because there's less music power on one channel, making it easier to see the tones.
(And google finds quite a few pages confirming those digits)
659-8890. You just better start sniffin' your own rank subjugation Jack, 'cause it's just you against your tattered libido, the bank, and the mortician, forever man, and it wouldn't be luck if you could get out of life alive.
That one's just ordinary DTMF. I recorded the audio, trimmed it manually and then made a spectrogram like this:
The 'rate' switch is to cut down on how much of the frequency space we can see. I left the audio as stereo because there's less music power on one channel, making it easier to see the tones.(And google finds quite a few pages confirming those digits)