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Voice/Control Channel Decoding Software - For discussion of software applications which decode digital voice formats and trunking control channels. Please use the HF Digital Signals forum for anything below 30MHz.

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Old 02-05-2018, 2:04 PM
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Default DSDplus fastlane - audio quality

Hey guys,
I'm listening to a Cap+ system that has all DMR but the audio playback keeps breaking up at times and sounds like a robot. Is there a way I can improve the playback quality?
The signal is very strong so it's not that.
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Old 02-05-2018, 3:09 PM
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Play with the input volume and centering of the signal. Also try a raw recording and run dsdtune on it.
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Old 02-05-2018, 9:04 PM
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Check CPU loading with Windows Task Manager. Is any process maxing out?

What are the system specs? Processor? Clock speed?

Provide a raw audio sample; then others can see where the problem is in the processing chain.
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Old 02-06-2018, 9:55 AM
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It's an older Windows 8 Samsung laptop that's now running Windows 10.
I believe it's an 3rd generation i5. Can't remember the specs but I'll look it up.
Also, might be CPU. I was running VNC on it to remotely see what's going on. That can make it stutter at times.
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Old 02-08-2018, 2:22 PM
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I've lowered the volume in FMP24 and the audio coming from DSDplus is a bit better. For DMR, it should be 12.5 or 7.6 kHz wide?
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Old 02-08-2018, 4:56 PM
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I always use 7.6; seems to work ok.
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