![GitHub - zeyus/Python3BlueBox: The most modern way to live in the 70s, 80s, and 90s, a phreaking awesome Blue Box DTMF tone generator GitHub - zeyus/Python3BlueBox: The most modern way to live in the 70s, 80s, and 90s, a phreaking awesome Blue Box DTMF tone generator](https://user-images.githubusercontent.com/75656/223700347-4d9d1f94-854a-4245-b336-8122c2cbdcf6.png)
GitHub - zeyus/Python3BlueBox: The most modern way to live in the 70s, 80s, and 90s, a phreaking awesome Blue Box DTMF tone generator
![16 Tone DTMF Generator Keypad 1234567890*#ABCD, 1750Hz tone burst, and CTCSS functionality:Amazon.com:Appstore for Android 16 Tone DTMF Generator Keypad 1234567890*#ABCD, 1750Hz tone burst, and CTCSS functionality:Amazon.com:Appstore for Android](https://m.media-amazon.com/images/I/717LJCQ6qXL.png)
16 Tone DTMF Generator Keypad 1234567890*#ABCD, 1750Hz tone burst, and CTCSS functionality:Amazon.com:Appstore for Android
![Figure 3 from Dual Tone Multi Frequency (DTMF) signal generation and detection using MATLAB software | Semantic Scholar Figure 3 from Dual Tone Multi Frequency (DTMF) signal generation and detection using MATLAB software | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/4826a18dc4c29eb77f915d6ce4ba5c3e93738c31/4-Figure3-1.png)