"Jittery" Audio Quality

VE6SWK
Posts: 9
Joined: Sat Aug 24, 2019 5:57 pm

Re: "Jittery" Audio Quality

Post by VE6SWK »

As I have said several times in this thread - Zero dejitter errors. It looks exactly like yours. Top blue line with small squiggles - flat red line at the bottom. invalid seqnum errors (0)

User avatar
HA2NON
SharkRF team
SharkRF team
Posts: 4519
Joined: Fri Mar 25, 2016 3:33 pm
Contact:

Re: "Jittery" Audio Quality

Post by HA2NON »

The local echo service can only record 2.5 seconds when using D-STAR modem mode. Exact length also depends on the used modem mode.
Norbert "Nonoo" Varga, HA2NON
SharkRF Team

VE6SWK
Posts: 9
Joined: Sat Aug 24, 2019 5:57 pm

Re: "Jittery" Audio Quality

Post by VE6SWK »

The 2.5 seconds is not in the device's documentation. The D-Star echo test leads to this section of the manual "Note that only about 10 seconds can be recorded and played back by the local echo service."

If it is only 2.5 then it explains the short messages; however, I've had the echo service fail many times - giving the same electronic jittery noise that is also heard when my audio is cutting out. Listen to the echo recording I made and posted earlier in this thread - the third echo test NOTHING is transmitted except for a split second of electronic noise. This happens generally about every 3 to 5 echo tests.

Again, I posted 90 seconds of audio with 19 dropouts. This is typical of listening to D-Star transmissions with the unit I have - I have never gone more then 5 or 6 seconds without a stutter or dropout. No dejitter errors, excellent RF/WIFI connections and have performed several hardware resets plus tried several different frequencies. I still have no explanation for the dropouts heard in the audio I have posted or the intermittent working local echo service. The unit is not working properly.

User avatar
HA2NON
SharkRF team
SharkRF team
Posts: 4519
Joined: Fri Mar 25, 2016 3:33 pm
Contact:

Re: "Jittery" Audio Quality

Post by HA2NON »

We'll update the manual with the correct information (local echo length depends on the currently used modem mode) when we'll release the next stable firmware. I've assigned your ticket to a colleague who will reply to your previous email.
Norbert "Nonoo" Varga, HA2NON
SharkRF Team

EdAtlanta
Posts: 47
Joined: Wed Dec 21, 2016 12:49 pm

Re: "Jittery" Audio Quality

Post by EdAtlanta »

My echo playback length is less than one second. Not even a complete word. It is very difficult to tell about the quality with such a short playback. This is an OS2 v59 and a Icom ID51a+ on D-Star.
Can the playback be changed to just a little longer?
Thanks.
Ed
Ed
KM4STL
3101156

User avatar
HA2NON
SharkRF team
SharkRF team
Posts: 4519
Joined: Fri Mar 25, 2016 3:33 pm
Contact:

Re: "Jittery" Audio Quality

Post by HA2NON »

D-STAR local echo length is limited. What you can do is to do a server echo test. Older REF/XRF servers do local echo on module E (example: REF001 module E).
Norbert "Nonoo" Varga, HA2NON
SharkRF Team

Tanker62
Posts: 3
Joined: Sat Dec 28, 2019 6:34 pm

Re: "Jittery" Audio Quality

Post by Tanker62 »

So, has this been solved? I'm getting a jittery sound as well sometimes, and it's rather difficult to deal when it eats up some key moments in phrases...

anndel
Posts: 16
Joined: Mon Dec 23, 2019 8:06 pm

Re: "Jittery" Audio Quality

Post by anndel »

I had the same problem with OP2 and my Icom ID-51A where audio dropped every 4 seconds. It turned out to be the weather alert and when I turned it off, audio streaming is continuous. See this Youtube video on it:

https://www.youtube.com/watch?v=bSfn4pUkm6g

Hopefully this will solve it.

Post Reply