Double Trouble Sound Card or MMTTY

[AF4OX]

I changed out my old Dell for a newer and faster dell OPtiplex GX620.  Now I can not get MMTTY to run.  I first started with the newer 1.68 version but then went back to 1.65 which was running fine on the old machine. Still not go! The Sound card in the GX620 is Analog Devices Sound Max.
I am getting audio into the soundcard because I can hear it on headphones on the PC Line Out port.  My K3 is set up OK because it will decode RTTY and display it.  Instead of two-ring figure for the MMTTY XY plot, I only get a blob and jibberish printing out.  When running WriteLog, the sound card is able to take WAV files and input them to my K3 transceiver.  So the sound card is not totally dead.  I have been over and over the MTTY setup and am confident that the setup is OK.  Of course I could be missing something.  I am beginning to suspect the motherboard mounted sound card is messed up.  Any tips/tests will be greatly appreciated.  My next step is desperation and to try an outbouard USB sound card.  I read some reports that this might be better anyway.
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[Don Wilhelm-4]

  Robert,

Do you have the sideband set correctly? - both MMTTY and the K3?  How
about the mark frequency? - they must match.

73,
Don W3FPR

On 10/27/2010 8:38 PM, Robert Seymour wrote:
> I changed out my old Dell for a newer and faster dell OPtiplex GX620.  Now I can not get MMTTY to run.  I first started with the newer 1.68 version but then went back to 1.65 which was running fine on the old machine. Still not go! The Sound card in the GX620 is Analog Devices Sound Max.
> I am getting audio into the soundcard because I can hear it on headphones on the PC Line Out port.  My K3 is set up OK because it will decode RTTY and display it.  Instead of two-ring figure for the MMTTY XY plot, I only get a blob and jibberish printing out.  When running WriteLog, the sound card is able to take WAV files and input them to my K3 transceiver.  So the sound card is not totally dead.  I have been over and over the MTTY setup and am confident that the setup is OK.  Of course I could be missing something.  I am beginning to suspect the motherboard mounted sound card is messed up.  Any tips/tests will be greatly appreciated.  My next step is desperation and to try an outbouard USB sound card.  I read some reports that this might be better anyway.
>
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[Kok Chen]

On Oct 27, 2010, at 5:38 PM, Robert Seymour wrote:

> Instead of two-ring figure for the MMTTY XY plot, I only get a blob and jibberish printing out.  When running WriteLog, the sound card is able to take WAV files and input them to my K3 transceiver.  

If you are seeing a fuzzy blob at the center of a crossed-ellipse display, it means that the (software) demodulator is tuned to some passband that contains noise and not the RTTY signal itself.

I would check to make sure that the Mark/Space tone pair that you have selected in your software matches the tone pair that is selected in the K3 (while in AFSK A mode, hold PITCH button -- the K3 will display the Mark tone that is selected).

73
Chen, W7AY

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[Joe Subich, W4TV-4]

 > I changed out my old Dell for a newer and faster dell OPtiplex
 > GX620.  Now I can not get MMTTY to run.

Your problems sound a lot like soundcard configuration issues.

 > The Sound card in the GX620 is Analog Devices Sound Max.

Unfortunately, Analog Devices provides no end-user support (they
are a vendor to OEMs) and the only information available is that
which would be provided by Dell.

 > Instead of two-ring figure for the MMTTY XY plot, I only get a
 > blob and jibberish printing out.

This sounds like MMTTY is not configured for the proper input or
you have connected the K3 Line Out to the wrong jack on the PC.

> Now I can not get MMTTY to run. I first started with the newer 1.68
> version but then went back to 1.65 which was running fine on the old
> machine.

I recommend you get MMTTY version 1.66 or 1.68 they are easier to
get working with soundcard problems.

What operating system are you running?

The Dell documentation shows three inputs for the soundcard:
1) front panel microphone, 2) rear panel microphone and 3) rear
panel "Line In".  I suggest you use the rear panel Line In.

>  My next step is desperation and to try an outbouard USB
> sound card. I read some reports that this might be better anyway.

That may be a good solution if your operating system is Vista
or Windows 7.  They have some restrictions on soundcard behavior
- they will not allow applications to select inputs on the "default"
sound card.  Installing a second soundcard is one way to sidestep
the operating system restrictions.  Be forewarned however, some
computers do silly things like disabling the internal sound card
if a second sound card is installed (even a USB sound card).
You may need to be prepared to work through the computer's BIOS
(hardware setup) to make two sound cards work together.

By the way, the best source for help with MMTTY is the MMTTY group
on Yahoo.

73,

    ... Joe, W4TV

On 10/27/2010 8:38 PM, Robert Seymour wrote:
> I changed out my old Dell for a newer and faster dell OPtiplex
> GX620.
Now I can not get MMTTY to run. I first started with the newer 1.68
version but then went back to 1.65 which was running fine on the old
machine. Still not go! The Sound card in the GX620 is Analog Devices
Sound Max.
> I am getting audio into the soundcard because I can hear it on
headphones on the PC Line Out port. My K3 is set up OK because it will
decode RTTY and display it. Instead of two-ring figure for the MMTTY XY
plot, I only get a blob and jibberish printing out. When running
WriteLog, the sound card is able to take WAV files and input them to my
K3 transceiver. So the sound card is not totally dead. I have been over
and over the MTTY setup and am confident that the setup is OK. Of course
I could be missing something. I am beginning to suspect the motherboard
mounted sound card is messed up. Any tips/tests will be greatly
appreciated. My next step is desperation and to try an outbouard USB
sound card. I read some reports that this might be better anyway.
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
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