DSD+

[john56]

That is a good question...the Bowling Green Police I am not sure of, I thought at one time last week that I was getting choppy audio from the DMR system in BG...but now I do not get anything

John

 

[john56]

Well.....I am going to call it a night.....I will try some Amateur DMR Repeaters and see if by chance
BGPD may be encrypted..

THANK YOU so much for staying with me on this......I got farther than I ever got.....

I will keep you posted on what I hear...if anything...

Thanks again!!

John KD8BIN

 

[j0atm0n]

not sure why your having difficulties , it sounds like everything is in place and working ,
only thing we havent really gone over is the virtual audio settings, audio sample rates etc ...

if the group call is encrypted you would see something in the dsd interface saying encrypted i believe


Just to make a check list for review :
Strong signal and tuned to centered of freq
audio from sdr# to speakers ( and muted or lowered )
dsd+ plugin set to virtual audio in with aux audio enabled
dsd+ plugin config settings for correct input / output
audio levels not to high or low ..



i do seem to remeber that Virtual Audio Cable does water mark the audio in the free version,
that could be interfering with the decoding of the audio .
i use vb audio instead : ( free for 1 in and output you can donate for more )
VB-Audio Virtual Apps

other than that im kinda at a loss of what the hang up might be .

 

[AggieCon]

I agree that VB Audio cable is the best for starters. I'd get that going.

When you are saying "motorboating," are you referring to a choppy digital decode, regular static, or the sound of a raw digital broadcast before decode?

If your setting are correct, you should either hear the audio call you are scanning, silence, or a choppy digital decode if the decode/signal is marginal.

I'm not convinced you have your audio settings correct, even though your earlier post appears it is correct. Something to look into if you are indeed hearing the raw transmission.

In SDR#, turn off the squelch, and make sure "Filter Audio" is deselected. Confirm the waveform fills about 90% of the DSD source audio window... adjust volume in SDR# to compensate. Confirm you are centered on the frequency, set to "NFM", and manually adjust the bandwidth to be a bit wider than the signal you are receiving.

What antenna are you using? How far away from the transmitter are you? What is your noise floor and signal strength?

With Windows 10, if you have an adequate PC, you should be able to maintain an SDR bandwidth around 2, but for scanning only a single frequency, lower is probably better.

If everything is set properly, the next troubleshooting is that you have a marginal signal. If so, there are a few steps that might be able to clean it up enough, such as fine tuning of DSD+.

I elect to not use the DSD plugin, but, otherwise, I utilize a setup similar to yours.

One last thing... It might be confused which DMR time slot you are wanting. With DSD+ running, and the Command Prompt window selected, you should be able to switch the time slots by pressing 1, 2, and 3. I suggest trying it on 1 for awhile, which will decode the first time slot, which I believe is the traffic you are looking for.

Screenshots would help.

If there are any decodes at all, it should have saved to an audio file in your DSD+ root directory. Look there to see if there are any .wav or .mp3 files.

 

[john56]

Gentleman:

IT WORKS!!!!!!!!! My problem was the SDR output was set wrong, and the Audio output slider was
set too high.

Now I am getting voice and talkgroup info....

Thanks to all who helped and stayed with me on this....I really appreciate your time and patience!

Thank You!

John KD8BIN

 

[j0atm0n]

Have fun Moaterboatin !

Mike

 

[john56]

Will do!!! Getting to the point I was hearing that in my sleep!! LOL..

Thanks again,

John KD8BIN

 

[AggieCon]

Excellent! Have fun with it. I recommend the -Pwav attribute so you can save your calls.