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generate & decode DTMF tones · live mic decode · Goertzel algorithm · runs locally
[
mode
]
(•)
generate & decode
( )
live mic decode
[
input
]
[
play tones
]
digits 0–9, A–D, *, # — dashes and spaces ignored
[
decoded
]
—
[
dtmf matrix
]
1209 Hz
1336 Hz
1477 Hz
1633 Hz
697 Hz
1
2
3
A
770 Hz
4
5
6
B
852 Hz
7
8
9
C
941 Hz
*
0
#
D
[
status
]
>
ready