De : "Conrad, PA5Y" <g0ruz@...>

Date : 30/08/2021 10:25 (GMT+01:00)

À : main@SDR-Radio.groups.io

Objet : Re: [SDR-Radio] Audio Selection

Hello Jean-Marc.

I think that we are not comparing the same thing. Perhaps this is entirely due to overhead and the fact that you are running a virtual machine. Also vanilla VBcable is not the same as Voice Meter Potato. I can assure you that on EME Voice Meter Potato (and probably other weak signal modes) completely out performs VAC.

My findings are contrary to yours.

Regards

Conrad PA5Y

Hi Conrad,

I have counter experience regarding vac and vbcable on a 24/7 spyserver clients.

The setup with sdr# (connected to the spyserver running an R2 ) -> vac -> wsjt-x (running wspr decode on 2m) is rock stable whereas

sdr# (connected to the spyserver running an HF+) -> vac -> wsjt-x (running wspr decode on 2m) is running few days (then sdr# stuck)

I tried to substitute vac with vb with poorer results both cases.

So this is no evidence on my side which virtual cable is performing the best.

I will try a c"client" running sdrcv3 instead of sdr# but the remote system is a windows VM under linux on an i7 small mini pc, so the horse power is minimal.

73 Jean-Marc

Voice Meter Potato (VMP) also gets my vote. I use it for many tasks including running demodulated audio from SDRCv3 or Linrad (for EME)  to WSJT-X.  I always found Sample Rate Conversion artefacts when using VAC. It has a similar effect to poor phase noise on weak signals with up to 2dB degradation when compared to a radio (K3S or TS-890) and a soundcard. This does not happen with VMP. I don’t know this for sure, but I think if you use soundcard with a decent clock such as a UMC202HD as the master output device this becomes the reference clock. I could be wrong as this is not made clear. However, I am sure that VMP is much better than any other virtual soundcard solution that I could find 18 months ago. It also has ASIO on the virtual inputs which has much lower latency and does not get mangled by Windows.

 

You can monitor any signal via the main output device. Like a real mixer it as solo buttons.

 

Regards

 

Conrad PA5Y

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Siegfried Jackstien via groups.io
Sent: 28 August 2021 21:21
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Audio Selection

 

i use potatoe from the same company ... works superb

also downloaded vac plus vac_a and vac_b and hificable

so now have 4x vac besides the 3 that potatoe brings with .. means 7 virtual cables used here together with the full blown mixer

(and additionalli installed lighthost and a few vst plugins to give my audio a better punch and sound)

so .. i can highly recommend the mixer and the virtual cables

greetz sigi dg9bfc

 

 

 

Am 28.08.2021 um 18:30 schrieb Max Mucci, N5NHJ via groups.io:

Hello Gedas,

A very helpful software mixer I use for almost everything:

VOICEMEETER by VB-AUDIO – The world´s most used Virtual Audio Mixer & Sound Tool 

 

Friday, August 27, 2021, 5:23:20 PM, you wrote:

 

Using a RSPdx with SDRC V3.1 and Laptop with W/10.

 

All works aok but then I had the bright idea to install VB Audio to get some VAC going so I could run WSJT etc.

 

That went smooth and was able to make many FB decodes overnight.

 

1. I wish there was a way to be able to hear what the RSPdx is tuned WHILE it's audio is being ported over to WSJT via the VAC. Is there an easy way of monitoring what the VAC is transferring?

 

2. The next part has me scratching my head......I am done with WSJT and just want to do some listening on this W10 laptop with the RSPdx. When I go to SDRC/OPTIONS/AUDIO/PLAYBACK/DEVICES I can see my Realtek PC speakers on one line and the VAC on the 2nd line.

 

I select the Realtek PC speakers, hit OK then re-start SDRC hoping to be able to hear the receiver via the speakers but get zip. Is there an easy way to switch from one to the other? I thought the OPTIONS tab is where I make this selection but apparently not. Thanks

 

Gedas, W8BYA EN70JT

 

Gallery at http://w8bya.com (under repair)
Light travels faster than sound....
This is why some people appear bright until you hear them speak.

 

 

 

 

 

 

 

 

 

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73 de Max, N5NHJ (I8NHJ)