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 Forum index » DIY Hardware and Software » Circuit Bending
DTMF tones
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Electrored



Joined: Feb 06, 2016
Posts: 1
Location: Canada

PostPosted: Sat Feb 06, 2016 7:22 am    Post subject: DTMF tones
Subject description: is it possible to generate DTMF tones without being connected to a phone line ?
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Hi!

I am working on a sound performance involving a telephone.
I want to use it to generate DTMF tones without being connected to a phone line.
Is it possible ?
How ?


Thanks!
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Blue Hell
Site Admin


Joined: Apr 03, 2004
Posts: 22822
Location: The Netherlands, Enschede
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PostPosted: Sat Feb 06, 2016 2:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

CoolEdit had a DTMF generator ... but it is not very hard to roll your own with for instance the Nord Modular G2 demo software. ... or any other modular synth ... basically it is two simulaneous sine waves that uniquely encode a symbol from a set of 16 or so
. Come to think of it .. a DAW prolly can generate sines as well of a specified frequency.

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Jan
also .. could someone please turn down the thermostat a bit.
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AlanP



Joined: Mar 11, 2014
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PostPosted: Sat Feb 06, 2016 4:39 pm    Post subject: Reply with quote  Mark this post and the followings unread

https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling#Keypad
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bubzy



Joined: Oct 27, 2010
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PostPosted: Fri Apr 08, 2016 11:19 am    Post subject: Reply with quote  Mark this post and the followings unread

you could put 50v DC into it on the 2 and 5 pins (if its the same as UK phones)
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