home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!cis.ohio-state.edu!ucbvax!bloom-beacon!eru.mt.luth.se!lunic!sunic!ugle.unit.no!venaas
- From: venaas@siri.unit.no (Stig Venaas)
- Newsgroups: alt.sb.programmer
- Subject: Re: Decoding DTMF tones with sb ? Is it possible ?
- Message-ID: <1992Jul28.102614.21751@ugle.unit.no>
- Date: 28 Jul 92 10:26:14 GMT
- References: <LAHIKAIN.92Jul27154518@mamba.lut.fi> <98=k02aT1b8R01@JUTS.ccc.amdahl.com>
- Sender: news@ugle.unit.no (NetNews Administrator)
- Distribution: alt
- Organization: University of Trondheim
- Lines: 36
-
- In article <98=k02aT1b8R01@JUTS.ccc.amdahl.com> wdc50@DUTS.ccc.amdahl.com (Winthrop D Chan) writes:
- >In article <LAHIKAIN.92Jul27154518@mamba.lut.fi> lahikain@lut.fi (Mikko Lahikainen) writes:
- >>
- >>Has anyone tried to decode dtfm tones (which for example telephones use)
- >>with sb ? What do you think If it is possible ?
- >>
- >>--
- >>-Lahi- * lahikain@lut.fi *
- >
- >
- >Hmmm... That would be kinda neat to do. Be able to decode all 16 DTFM and maybe
- >even play them back.
- >
- >Oh oh.... Me thinks this is starting to sound a hell of alot like what they
- >did with the ole AppleCat modem. :-)
- >
- >Winthrop Chan
-
- I've made a program that plays 0-9,* and #. I've cheated a bit though.
- I'm using vplay and samples of the touch tones.
- But, I'm writing a new one now, where I generate the tones by driving
- the SB directly. I'm also thinking of incorporating decoding.
-
- There are two problems which I hope someone can help with.
-
- 1. What are the other 4 DTFMs? I know the freqs for them, but I don't
- know what they are called. Each consists of two sine waves. There
- are four choises for each of them. I know all the freqs and I know
- which pairs 0-9 uses, and I can find out which * and # uses. But
- not the other 4.
-
- 2. I need some info on how to program the SB in order to sample. I
- could look into the code for vrec, but it's not an easy way of
- getting the info.
-
- Stig
-