DSD Decoding, but no audio
- Thread starter NekoD
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Comint
Member
While it may be decoding the datastream, it is NOT getting to the stage of providing Audio.
HDU and LDU2, at least, are required for a Voice channel, and your screen shot clearly shows that it is ignoring LDU2, and therefore NOT processing it to the stage of getting the required TGID, ALGID, etc. so NO Audio.
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Comint
Last edited:
slicerwizard
Member
A DUID is two symbols - 2 and 0 in this case.
Tweekerbob
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It's the check everything phase:
How strong (and clear) is the signal coming into the radio? Can you do anything thing to improve this if need be? If there is analog on the same system, how does it sound?
First make sure the audio coming into and also through the soundcard is clean. Can you listen to it "through" the computer? If so, is there a hum on the audio signal? Is the audio cable plugged into the mic or line in jack of the soundcard? If mic, is the "microphone boost" on? A line level input is best, maybe try an external USB soundcard and use the line in.
Have you looked at the signal with a software oscilloscope, like Uniscope? If so can we get a screenshot of that?
The final stage, once you are fairly certain the audio is as good as it gets, it to set the audio levels appropriately. Too high and your soundcards amp will distort and clip.
How strong (and clear) is the signal coming into the radio? Can you do anything thing to improve this if need be? If there is analog on the same system, how does it sound?
First make sure the audio coming into and also through the soundcard is clean. Can you listen to it "through" the computer? If so, is there a hum on the audio signal? Is the audio cable plugged into the mic or line in jack of the soundcard? If mic, is the "microphone boost" on? A line level input is best, maybe try an external USB soundcard and use the line in.
Have you looked at the signal with a software oscilloscope, like Uniscope? If so can we get a screenshot of that?
The final stage, once you are fairly certain the audio is as good as it gets, it to set the audio levels appropriately. Too high and your soundcards amp will distort and clip.
Comint
Member
To be able to extract the full audio, BOTH the LDU1 and LDU2 frames are required.
Your screenshot indicates that LDU2 is ignored because it is not preceeded by LDU1.
In other words, the program cannot find LDU1, so it would be a waste of time prossessing LDU2.
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Comint
Last edited:
Milkshake
Member
Is the signal constantly transmitting? (possibly GPS data)
Are you using an external USB sound card? (check the headphone jack of the USB card for audio)
What commands are you using when you start DSD?
Are you using an external USB sound card? (check the headphone jack of the USB card for audio)
What commands are you using when you start DSD?
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