DSDPlus DSD+Fast Lane Newb - Better P25 P2 Sound ?

[WA4NUF]

Hi, I`m new to the forum and have P25 P2 working both CC and VC and data flowing great. The only problem is I need to have my audio cleaned up. My -o1 audio is somewhat distorted. I have basic batch files attached. I have read over the notes but need a little guidance on fine tuning the audio.
Any help on cleaning up the audio is appreciated.

 

[beyondcr]

Do you have a sample of the audio? I have been going over my setup for the past few days also trying to get the audio better... My audio is not really distorted but more like a digital choppiness like syllables are dropping out, I had op25 running with little issue but I am on windows now.

 

[simpilo]

Do you have a sample of the audio? I have been going over my setup for the past few days also trying to get the audio better... My audio is not really distorted but more like a digital choppiness like syllables are dropping out, I had op25 running with little issue but I am on windows now.

Same experience with the choppiness in the audio here. I have emailed DSDPlus Fastlane a month ago asking them if they will optimize p2 audio they replied they will. Time will tell.

 

[beyondcr]

My commands are
CC.bat
DSDPlus -f1 -rc -i20002 -E -v3 >>CC.log -u64 -M1000
VC.bat
DSDPlus -f1 -rv -i20001 -v3 >>VC.log -o2 -u64 -M1000

adding -u64 and -M1000 seemed to help not sure what they do or if I am even within spec with the -M1000

also...
FMP24 -rv -o20001 -i2 -P0.8 -g25.4 -v4
FMP24 -rc -o20002 -f771.10625 -i3 -P82.6 -g43.9 -v3

Any ideas of anything else I could try adding to aid in audio improvement before I run a dsdtune?

 

[simpilo]

My commands are
CC.bat
DSDPlus -f1 -rc -i20002 -E -v3 >>CC.log -u64 -M1000
VC.bat
DSDPlus -f1 -rv -i20001 -v3 >>VC.log -o2 -u64 -M1000

adding -u64 and -M1000 seemed to help not sure what they do or if I am even within spec with the -M1000

also...
FMP24 -rv -o20001 -i2 -P0.8 -g25.4 -v4
FMP24 -rc -o20002 -f771.10625 -i3 -P82.6 -g43.9 -v3

Any ideas of anything else I could try adding to aid in audio improvement before I run a dsdtune?

-M switch sets recording quality. 32 is max. Doesn't affect sync ouput.
-u sets unvoiced speech quality. If it's too high it'll cause DSD+ to use more cpu cycles. 64 is max

Not necessary to do any command switches. Raw data isnt affected with those switches. Run DSDTune anyway.

 

[simpilo]

I retract my statement. The tuning parameters dont work in TCP mode. DSDTUNE wants ds but DSDPLUS throws an error. Thats by design. DSDTUNE WILL NOT work on p25 pII audio. It will work on pI audio fed via virtual cables from Unitrunker or SDR#

 

[beyondcr]

Ok so I remove the -M audio is still choppy but slightly better with -u64 I don't notice any impact on the cpu, I was also wondering on the title bar of dsd+ there is S/S=4800? What is it and can or should it be changed?

 

[simpilo]

Ok so I remove the -M audio is still choppy but slightly better with -u64 I don't notice any impact on the cpu, I was also wondering on the title bar of dsd+ there is S/S=4800? What is it and can or should it be changed?

Nothing you try will fix it. Best bet is to wait till the DSDPlus team optimizes PII TDMA audio. I to did everything in notes.txt and dsdplus help. PII is new still in DSDPlus.
FMP24 to DSDPlus connected via TCP is different. It is sending raw data not audio over the TCP protocol and not using the windows sound system. DSDPlus decodes that then sends to the audio system. That's why nothing you can do about it. If you're decoding anything else like PI or DMR over virtual cables then you can do something. 4800 is the output sample rate in hz (hertz). You can also say it as 4.8khz sample rate,

 

[CanesFan95]

I get choppy broken audio on Phase II.

 

[WA4NUF]

Thanks for all the replies. I believe as well , it`s more clipping or choppy audio rather than distorted. Can still make out most of the audio, so I`m getting there. Hopefully a fix on the next version.

 

[DRL-XM43]

Mine seems to work very well?

One thing to check is that your dongles are using USB 2.00 ports and not 3.00, my experience is that dongles don't play well with USB 3.00 ports and I experienced very choppy audio when I did.

 

[simpilo]

Mine seems to work very well?

One thing to check is that your dongles are using USB 2.00 ports and not 3.00, my experience is that dongles don't play well with USB 3.00 ports and I experienced very choppy audio when I did.

That's not the issue. It really does need to be fixed. A few already has came forward and said it has a choppy effectr that sounds like syllables dropping. I won't let this real issue be downplayed just because a few say they don't have the issue. It's a optimization issue. Let it play out. If the DSDPlus Fastlane team optimizes PII better it'll be even better for you too.

 

[WA4NUF]

I`m using both on USB 2.0. Definitely not the problem. Hopefully better next version...

 

[TheButcher]

Check CPU use by right clicking on the bottom task bar and select "Start Task Manager". Make sure you have the "Performance" tab selected afterwards. Your PC might be too slow?

No P25PII around my parts, so no way of testing !

 

[EarHoles]

Those having problems can you show us your signal in FMP24VC?

 

[beyondcr]

I have a Ryzen 7 2700 cpu (8core 3.2Ghz/4.1Ghz max boost) with 16gb of 3200mhz ram and a Samsung 850evo ssd. I installed usb 2.0 ports directly to the headers on my motherboard and it sounds exactly the same as the 3.0 and 3.1 ports. Cpu usage is 3% while I am writing this with DSD+ running and 6 other tabs opened in chrome. Memory usage is 28%. I'm running windows 10 64bit pro fully updated... Running out of ideas. If anyone has good audio on phase 2 can you please post your specs?

 

[beyondcr]

Those having problems can you show us your signal in FMP24VC?

Quick video,

sorry about the watermark I am going to look into screen recorders now, this was just the first I came across...

 

[IcomIcR20]

@beyondcr .... The York County system is a P25 Phase II simulcast system. Depending on the system, simulcasts can cause lots of distortion and drop-outs like you are experiencing. I've been to some counties where the distortion is so bad that even my Uniden scanner hardly picked up anything. Others aren't that bad... it just depends on how the system is set up and where your location is with respect to the simulcast sites.

And @WA4NUF, based on your callsign I see you are near Charleston... if you are monitoring the Charleston Simulcast, then that could explain the choppy audio as well. If you are monitoring one of the stand-alone sites then you shouldn't have that issue.

I could be wrong, but I'm just speaking from my personal experiences with simulcast systems, although I've not tried monitoring one with DSD. I've only used DSD on stand-alone sites.

 

[EarHoles]

Quick video,

sorry about the watermark I am going to look into screen recorders now, this was just the first I came across...

Your signal and gain looks great, may i ask what antennas your using?
Very frustrating

 

[beyondcr]

Your signal and gain looks great, may i ask what antennas your using?
Very frustrating

For the voice a ant500 on a base that came with a nesdr smartee bundle hooked to the nesdr, then the extendable antenna that came with the smartee bundle on a base that came with a old 820t2 hooked to the 820t2 for the Control.