[App_rpt-users] Audio has no bass...

[Kevin Custer]

To add to what Corey suggested, any time I see a post that indicates the 
repeater as tinny audio, the first thing I suspect is the audio is 
double - pre-emphasized.

This can happen two ways:
The audio feeding the transmitter is already pre-emphasized, but the 
transmitter is doing it again.  Audio placed in to the MIC input will 
almost always add pre-emphasis to the applied audio. If you are feeding 
a radio that applies the pre-emphasis as part of the hardware, then 
don't add pre-emphasis in the configuration file.

It can also happen with some hardware (no necessarily app_rpt) when the 
receiver audio never gets de-emphasized and that audio is fed to a 
transmitter that applies pre-emphasis as part of the hardware.

Both of these will result in double pre-emphasis and the audio will 
sound tinny.

More on this subject is available on RB.
www.repeater-builder.com

Kevin - W3KKC







On 4/4/2016 9:16 AM, Corey Dean wrote:
> Did you see this in the usbradio.conf?
>
> txprelim = no           ; Audio processing on left output channel: no,yes
>                         ; no - Audio is not pre-emphasized and limited.
>                         ; Suitable for use on a microphone input
>                         ; yes - Audio is pre-emphasized and limited.
>                         ; Suitable for direct connection to an FM 
> modulator
>
>
> On Mon, Apr 4, 2016 at 8:46 AM, Bryan Taylor <overnite at me.com 
> <mailto:overnite at me.com>> wrote:
>
>     Curious as to if there are any settings in the dial setup that
>     would make the sound have more bass, I have 2 nodes using icom
>     icf-f121
>     Radios and one using a Motorola gm300 and they all sound fine, the
>     other node is using an old Marconi Marcom vi and the audio it
>     transmits back to the repeater  is very tinny... The audio it
>     sends out over the network is really nice. Just wondering if there
>     are different settings for different style audio
>     Thanks
>     Bryan
>     Vo1mxz
>

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