DTMF monitoring via multimon, awk and espeak

Question

Hello, the question is:

• How to listen to the spoken DTMD digit every time the sound card capture one?

The objective is radio controlling my pc and interfaces activities dialing dtmf tones via a hand-held transceiver.

I used multimon to hear DTMF tones I tried to use awk to filter digits and proceed accordingly. For example, if I key "0" from the radio the system must reboot, etc, but first confirming the operation. " The computer will reboot, send # to confirm"...

I tried to use espeak for a voice confirmation to the remote radio. The radio connected to the pc soundcard receives the commands and transmits the responses.

I do not simply know how to nest multimon within awk within espeak.

Multimon itself doesnt let me do anything with its stdout because its running ( do not terminate after hearing a digit, which is indeed right).

It would be extremely helpful if I knew how to just speak each digit, without exiting the natural multimon loop.

Say, multimon -a DTMF | awk'{print}' espeak -stdin If this simply worked!

Is it possible to do? Any help wellcome. Once I didnt see any DTMF Radio Controlling project in Linux, I plan to publish this shall I can solve this issue.

Thanks / Mario/ sao paulo brazil

Answer 1

You can use the system() function to launch espeak from your awk script.

Answer 2

@OP, i am not clear about your question, but seeing that system() interests you, here's how you call external command in awk

multimon -a DTMF | awk '{
  cmd="espeak "$0 #$0 comes from the multimon output
  system(cmd)
}
'