SDR with a Scanner split audio

[ScannerDude244]

Is their anyway to split the audio via SDR on the left and the scanner on the right channel with radiofeed?

 

[boatbod]

No idea about the capabilities of 'radiofeed' but liquidsoap can manipulate streams in the manner you require.

 

[wgbecks]

RadioFeed does provide for stereo encoding on either or both the Source Client and Web Server. However, you'll need an audio adapter that will let you split the Mic/Line input between your scanner and SDR device. You'll need to balance input the levels as close as possible feeding the left and right channels into your the PC's soundcard. Lastly, you'll need to bump up the sample rate in RadioFeed above the default setting when encoding in stereo. Failure to do so will often result in some audio encoding distortion when both channels are active.

 

[ScannerDude244]

I'll check out liquidsoap!

No idea about the capabilities of 'radiofeed' but liquidsoap can manipulate streams in the manner you require.

I'll check out it thanks!

RadioFeed does provide for stereo encoding on either or both the Source Client and Web Server. However, you'll need an audio adapter that will let you split the Mic/Line input between your scanner and SDR device. You'll need to balance input the levels as close as possible feeding the left and right channels into your the PC's soundcard. Lastly, you'll need to bump up the sample rate in RadioFeed above the default setting when encoding in stereo. Failure to do so will often result in some audio encoding distortion when both channels are active.

What kind of audio adapter do I need a USB sound card?

 

[wgbecks]

You should be able to make use of the PC's built in sound card. I was referring to some sort of "Y" adapter cable that splits out separate "Left" and "Right" channels to facilitate two audio sources for input to RadioFeed.

Most likely the adapter will need a 3.5 mm stereo plug on the end that goes to the PC and probably RCA jacks on "Y" split left/right channels. Beware that some of these adapters are designed to combine both channels into a mono source while others break out the left and right channels that is needed for you application. Then you'll have to address what cables might be needed to interface with that to connect up your scanner and other SDR's device sound output.

Often times you need to install a ground isolator when connecting a scanner or other sound device to your PC to prevent an electrical ground loop that creates all sorts of noise components into your feed stream. Again, the breakout of the "Y" adapter can easily facilitate insertion of an in-line ground loop isolator or audio isolation transformer.

 

[ScannerDude244]

You should be able to make use of the PC's built in sound card. I was referring to some sort of "Y" adapter cable that splits out separate "Left" and "Right" channels to facilitate two audio sources for input to RadioFeed.

Most likely the adapter will need a 3.5 mm stereo plug on the end that goes to the PC and probably RCA jacks on "Y" split left/right channels. Beware that some of these adapters are designed to combine both channels into a mono source while others break out the left and right channels that is needed for you application. Then you'll have to address what cables might be needed to interface with that to connect up your scanner and other SDR's device sound output.

Often times you need to install a ground isolator when connecting a scanner or other sound device to your PC to prevent an electrical ground loop that creates all sorts of noise components into your feed stream. Again, the breakout of the "Y" adapter can easily facilitate insertion of an in-line ground loop isolator or audio isolation transformer.

This one work?

 

[wgbecks]

That is exactly what I had in mind and have used similar adapter for my own feeds in the past. Notice the Red and Black jack are assigned to the Tip and Ring poles of the TRS (3-Pole) plug that would go into the PC's mike or line input jack. Just be aware that newer PC's (Laptops) now use a 4-Pole jack to combine headphone and microphone audio onto a single connector when selecting your adapter(s).

 

[ScannerDude244]

I did some testing with SDRtrunk I sent the audio output to primary driver, but on radiofeed side it wasn't capturing the audio? Is their something i'm missing?

 

[wgbecks]

If you're running SDRTrunk on the same PC as Radiofeed then you'll need to install Virtual Audio Cable or similar program to interconnect the two software applications. However, I don't think that you'll be able to setup a split audio feed (left/right channels) with this arrangement.

What you'd probably need to accomplish split channel sources is a add a USB sound device to the PC in addition to the built-in sound card that you'd use as the sound device for your SDRTRunk configuration. Then using your "Y" adapter connected to the MIC/LINE input of the PC's sound device you'd be able to still provide one external audio source to either the left or right channels while looping the output of the USB sound device to the opposite channel of the "Y" adapter.

This arrangement would then allow you to feed separate channels into a single instance of Radiofeed. Note also that it is possible to setup multiple instances of Radiofeed with separate audio sources to provide independent private or public feeds (streams) from the same computer.

 

[ScannerDude244]

I got it to work with voicemeeter it's a neat program!