Audio sounds like digital on analog frequency - Kenwood feature?

[EasternMassScanFan]

A PD channel I listen to uses Kenwood radios and operates on analog, when listening to the channel the units sound like they are digital but this is on an analog channel. There is no digital patched to this channel. I recall hearing about a feature Kenwood radios have where they sound digital but operate in analog mode. Anyone know what Kenwood feature this is?

 

[mmckenna]

Can you clarify something?

Is it analog audio that is understandable, but has digital artifacts, or is it fully digital audio on what is normally an analog channel?

 

[DeoVindice]

Viking analog noise reduction sounds like that. The TrueVoice stuff handles the noise cancellation in the vocoder.

 

[tweiss3]

Fleetsync IDs at beginning or end of transmissions? Or is it just inversion scrambled? Kenwood lets you pick the frequency of inversion, unlike Moto which only gives you 2 inversion frequencies.

 

[EasternMassScanFan]

Can you clarify something?

Is it analog audio that is understandable, but has digital artifacts, or is it fully digital audio on what is normally an analog channel?

Analog audio that is understandable but sounds like digital artifacts

 

[EasternMassScanFan]

Viking analog noise reduction sounds like that. The TrueVoice stuff handles the noise cancellation in the vocoder.

That is what I think it is

 

[dryfb]

Viking analog noise reduction sounds like that. The TrueVoice stuff handles the noise cancellation in the vocoder.

Saw a video demonatrating that, definitely sounds like that's what he's talking about

 

[mmckenna]

Analog audio that is understandable but sounds like digital artifacts

I agree with @DeoVindice, sounds like the DSP trying to work with background noise.

 

[vagrant]

My local PD is in transition from Motorola to Kenwood and I hear that “digital sounding audio” as well.

 

[wd8chl]

What radio are you listening with?

 

[ak7an]

Compander?

 

[AM909]

If it's understandable, but really "tinny", I vote for companding too, or whatever various manufacturers have called it. I just saw a Maxon manual suggesting that companding be turned on when the radio was to work with existing Motorola CLS radios because those have companding on by default. It clued me in that that was the restricted/compressed audio I heard on the "normal" radio listening to the CLS.

Anyone know if there is a companding standard, or does each manufacturer just do their own thing? I've never seen configuration params directly related to it.

 

[KC3ECJ]

If it's understandable, but really "tinny", I vote for companding too, or whatever various manufacturers have called it. I just saw a Maxon manual suggesting that companding be turned on when the radio was to work with existing Motorola CLS radios because those have companding on by default. It clued me in that that was the restricted/compressed audio I heard on the "normal" radio listening to the CLS.

Anyone know if there is a companding standard, or does each manufacturer just do their own thing? I've never seen configuration params directly related to it.

The one local police department around here sounds soft if I listen to it on certain radios.

 

[d119]

Suddenly I have the desire to go turn this on in my VP8000...

@DeoVindice this answered a question I had in another forum about our local FD having what sounded like P25 extenders on their analog channels. You nailed the answer with this - thank you!