Generating Pure Tone & DTMF Tones

Question

I would like generate Pure Tones (Single Freq) and DTMF Tones in C# (using DirectX) .. Can anyone guide me in this direction.

Thanks,

--Yatharth

 

Answer 1

Your best bet is to find a 3rd party that offers a library to generate DTMT-type tones.  You can find them using your favorite search engine on the internet.

Answer 2

 

I know it is not really game programming, but as the company that I am currently working for has done some of this, here are some sample pages that might get you started.

Sample Applications for TAPI in .Net
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http://www.exceletel.com/products/TeleTools/SamplePrograms/Index.htm
http://www.torry.net/pages.php?id=199&SID=a98f01a9d2ff194eeb70eb5f2dfe4249
http://www.programmersheaven.com/zone15/cat724/

And of course you shoudl also have a look at Google, and do some searches on TAPI programming. I have seen some more examples on www.gotdotnet.com

 

Answer 3

Hi,

If you visit http://thecodeabode.blogspot.com/ you will get a set by step break down with sample code of how to generate pure DTMF tones in C# and store them as a wave, or play them directly through your soundcard......

Answer 4

I visited the website indicated (codeabove) and many links was broken. I did a class to generate a WAV file with DTMF. The explanation of DTMF was in portuguese, but all the code is in english.

The sample to generate the DTMF for the number 55115554432 is:

BasicTelephony.WriteWAVFile(8000, 16, 1, b.GenerateDTMF(txtNumero.Text, duracaoSilencio, duracaoTom, 8000,16))

This method will return a MemoryStream with WAV Headers, if you don't want the WAV Header you use this sample:

b.GenerateDTMF(txtNumero.Text, SilenceBetweenTones, ToneDuration, 8000, 16)

The link form my library is:  http://www.guergolet.com.br/?p=45

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André Guergolet