NX 3320E Audio Profiles on DMR

[G4RKY]

Hi,

I'm wondering if anyone has already been around this loop, not wanting to re-invent the wheel!

I am having a problem in finding the optimum settings for the audio profiles on the fleet of NX-3320 radios I manage. I'm using them in DMR mode but as far as I know, the audio processing for NXDN and DMR is similar, using the AMBE 2+ vocoder.

I'm getting a raft of complaints from users who are saying the audio quality is not up to their expectations and to a degree I can sympathise - we had a different DMR radio in use before and it didn't have all the noise suppression and equalisation etc. that the Kenwood has and honestly the audio was much better!

There are so many combinations of the settings to try, I could spend a whole month going through them and then forget what the first ones sounded like!

Has anyone got any experience with this or could give me a good starting point?

I've been through the in-depth manual also and tried some of the changes described there but still its inconclusive.

Thanks in advance,

Kind regards,
Matt

 

[LTR]

I had posted the same problem here back in October with the NX-3300 (multi-pin version) using NXDN. I thought the audio sounds terrible in these radios compared to any other NX series radio. I even tried Kenwood tech support, and they said everything was fine with them and no one else has complained. I have about 100 of them on a trunked NXDN system and I hear complaints all the time from users. This same system has over 500 other users with NX-5000, NX-300 and NX-320's, and no one else has complained about their audio as much as the 3300 users.

 

[LTR]

If you want to try it, here is what I finally settled on, but I still think it is not as good as the other models.

Preset: Standard

Microphone Sense: Digital Offset to -4dB

Active Noise Reduction: Standard

RX Auto Gain : Off
Preset: Flat
Audio Equalizer : Low to -6dB, High to -4dB, the middle three leave at 0dB

TX Auto Gain: On
Audio Equalizer: everything at 0dB

 

[G4RKY]

Many thanks for the reply LTR, sorry for my late reply but I've been in an airplane.

I read some stuff in the in-depth manual about the effects of the different options and I am trying some settings out in 2 weeks time- I'm in the somewhat unique position of having to reprogramme all my 400 radios every 2 weeks and so I will report back my findings.

Basically what they say in the in depth manual is that some of the DSP settings can make the audio "fuzzy " so I've turned it all off and changed the equalization settings to make it less bassy in both directions. I also reduced the Mic gain but by 6dB.

I Will let you know how it goes!

Cheers
Matt

 

[G4RKY]

Many thanks for the reply LTR, sorry for my late reply but I've been in an airplane.

I read some stuff in the in-depth manual about the effects of the different options and I am trying some settings out in 2 weeks time- I'm in the somewhat unique position of having to reprogramme all my 400 radios every 2 weeks and so I will report back my findings.

Basically what they say in the in depth manual is that some of the DSP settings can make the audio "fuzzy " so I've turned it all off and changed the equalization settings to make it less bassy in both directions. I also reduced the Mic gain but by 6dB.

I Will let you know how it goes!

Cheers
Matt

Here's my audio settings I'm using for this week. So far there have been only positive comments from the users, so fingers crossed step by step we will get some improvement.

This week's new problem; busy channel lockout firmware update 2 weeks ago and this week some strange lockout related problem where only sometimes the lockout continues for the entire hangtime of the repeater!

I've requested 2 nx 5000s for testing.....

Regards
Matt

Sent from my SM-G930F using Tapatalk

 

[LTR]

I'll have to give those settings a try and see what they think. The audio is much nicer in the 5000's.

 

[phillmobile]

can't you run nxdn i am sure the audio will be better and you will have more range