SDRplay Community Forum

Trying to get the ACARS capabilities working. Installed VAC, but Multi does not seem to get the feed from SDRuno. I've pointed the config in SDRuno to have the VAC as the output. I suspect this may be something in MultiPSK I'm missing. Screenshot attached Amy thoughts?

Have you gone into MultiPSK and in the input selected soundcard and set it to Cable Output (VB-Audio)?

Thanks for the reply. Yes, as far as I can see I have thing set accordingly. I've attached more screenshots. I suspect somewhere I have missed something....

You are using the wrong input. You are not using the "Soundcard for SDR Transceivers" . This is for devices like the Softrock and MULtiPSK will do the IQ processing.

You are using A SDR receiver but it has already done all the IQ processing and demodulation. You are just providing audio (like any other analog receiver) to MultiPSK via the VB Cable. So deselect the "Soundcard for SDR Transceivers" and select VB Cable from the Soundcard input.

Roger

Roger, thanks for the reply, this is how I have set them in MPSK: Is this correct?

I solved the issue. I had the Win10 audio control playback set for my earphones and this seems to have caused the MultiP to not hear the input. Once I set it to VAC I started to see the decoding of data. I'm still working thru this, but I think I have this down.

Thanks

cyul01 wrote:Roger, thanks for the reply, this is how I have set them in MPSK:
Is this correct?

You are close but not quite there yet.

For sound card output select Soundcard 2, 3 or 4 so sound comes out your speakers when transmitting. Since you are not transmitting you won't be using this feature from MultiPSK.

Now when you run SDRUno you will see the signal in MultiPSK on the waterfall but you won't be able to hear it. To do this you need to tap into the VB cable so that you can monitor whatever is on the VB Cable. To do this you need to go into Windows Control Panel and do the following.

- Exit SDRUno & MultiPSK
- Select Sound
- Select Recording Tab
- Select Cable Output
- Select Listen Tab
- Click "Listen to this device"
- Under "Playback through this device" select Speakers or whatever you play your sound through normally
- Click Apply and then OK
- Exit

Start SDR Uno and now you you should be able to hear sound coming out of the speakers. Start MultiPSK and you should have a signal on the waterfall. You control the level in MultiPSk with the volume control of VRX0 in SDRUno. So set this to a reasonable level in SDRUno. Once this is done you can adjust the volume coming out of the speakers with your Windows volume control for the speakers.

Thanks Roger - your instructions resolved my issues!