Browser audio output plugin and online SDR

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skyking_comms
Posts: 22
Joined: Thu Aug 20, 2020 10:13 am

Browser audio output plugin and online SDR

#1

Unread post by skyking_comms »

I am looking to use this online SDR http://websdr.ewi.utwente.nl:8901/ but want to open it in multiple browser tabs, each tab set to a different frequency.
This is easy to do, but the difficult part is that I want to route the audio from each tab to a separate virtual audio cable (VAC).
So if I wanted to tune 5 different frequencies I'd open 5 browser tabs and set 5 individual VAC's.

I found a Chrome Plugin called AudioPick, which appeared to be the solution I needed. In each Chrome tab it allowed you to choose whatever audio output you wanted. But.. when I tried to route the audio from http://websdr.ewi.utwente.nl:8901/ to VAC 1 it didn't work (even though VAC 1 was selectable in the list)
I now believe that this is because the AudioPick plugin only takes the audio from HTML5 pages (so things like YouTube videos)
https://chrome.google.com/webstore/deta ... gaha?hl=en

Is anyone aware of any other plugins for any browser that will allow me to route the audio from individual tabs to virtual audio cables?

Thanks
Last edited by skyking_comms on Wed May 11, 2022 3:06 pm, edited 1 time in total.

Max
Posts: 481
Joined: Thu Aug 13, 2020 9:47 am

Re: Browser audio output plugin and online SDR

#2

Unread post by Max »

skyking_comms wrote:
Wed May 11, 2022 11:47 am
I found a Chrome Plugin called AudioPick, which appeared to be the solution I needed. In each Chrome tab it allowed you to choose whatever audio output you wanted. But.. when I tried to route the audio from http://websdr.ewi.utwente.nl:8901/ to VAC 1 it didn't work (even though VAC 1 was selectable in the list)
I now believe that this is because the AudioPick plugin only takes the audio from HTML5 pages (so things like YouTube videos)
https://chrome.google.com/webstore/deta ... gaha?hl=en

Is anyone aware of any other plugins for any browser that will allow me to route the audio from individual tabs to a virtual audio cables?

Thanks
Tiny text at bottom of Twente page seems to imply that it DOES use HTML5 sound?

Assume you have tried the plug-in on known HTML5 pages (like YT) to check it works fine there?

Max

jdow
Posts: 566
Joined: Mon Aug 10, 2020 8:17 pm

Re: Browser audio output plugin and online SDR

#3

Unread post by jdow »

Underneath the RX frequency report on the main window's "Receive" side bar you will probably see a wonderful label that says "Default". For each receiver use that to select the destination for the sound. If this does not work I bet Simon would be motivated to fix it.

Select a receiver then set the sound destination and level. Lather rinse and repeat until you're done.

{o.o}

skyking_comms
Posts: 22
Joined: Thu Aug 20, 2020 10:13 am

Re: Browser audio output plugin and online SDR

#4

Unread post by skyking_comms »

Max wrote:
Wed May 11, 2022 2:48 pm
skyking_comms wrote:
Wed May 11, 2022 11:47 am
I found a Chrome Plugin called AudioPick, which appeared to be the solution I needed. In each Chrome tab it allowed you to choose whatever audio output you wanted. But.. when I tried to route the audio from http://websdr.ewi.utwente.nl:8901/ to VAC 1 it didn't work (even though VAC 1 was selectable in the list)
I now believe that this is because the AudioPick plugin only takes the audio from HTML5 pages (so things like YouTube videos)
https://chrome.google.com/webstore/deta ... gaha?hl=en

Is anyone aware of any other plugins for any browser that will allow me to route the audio from individual tabs to a virtual audio cables?

Thanks
Tiny text at bottom of Twente page seems to imply that it DOES use HTML5 sound?

Assume you have tried the plug-in on known HTML5 pages (like YT) to check it works fine there?

Max
Thanks for the reply Max - well spotted (it's so easy to miss!).
I then noticed under the advanced tab that you can choose between Java and HTML5 as the sound output.

I decided to try sending the audio via a VAC to Audacity (audio recording software), and that picked up the sound and recorded it perfectly.
The problem now lies with another piece of software that I was sending the audio to. Nothing like fault finding!

The issue I now have is that in Windows I have to tell it which VAC is the playback device (left click on the speaker icon on bottom right desktop toolbar, expand the list, choose Line 1 virtual audio cable) - If I choose speakers then Audacity doesn't detect the sound from a VAC.
Because of this I'm restricted to opening one tab with one vac to Audacity, whereas I want to open multiple tabs and multiple instances of Audacity, all set to a different VAC. Hopefully this is something that others can replicate to see what I mean (it's not the easiest to explain!) Can anyone help???

The VAC's work perfect using Simon's SDR Console - no need to make any changes! I just wanted to experiment with an online SDR using multiple tabs

Max
Posts: 481
Joined: Thu Aug 13, 2020 9:47 am

Re: Browser audio output plugin and online SDR

#5

Unread post by Max »

skyking_comms wrote:
Thu May 12, 2022 5:45 pm
The issue I now have is that in Windows I have to tell it which VAC is the playback device (left click on the speaker icon on bottom right desktop toolbar, expand the list, choose Line 1 virtual audio cable) - If I choose speakers then Audacity doesn't detect the sound from a VAC.
Because of this I'm restricted to opening one tab with one vac to Audacity, whereas I want to open multiple tabs and multiple instances of Audacity, all set to a different VAC. Hopefully this is something that others can replicate to see what I mean (it's not the easiest to explain!) Can anyone help???
OK, not fully sure what you are needing, but for getting sound to speaker when using VAC (I think you imply that's one of the things you want to do?):

(1) Open the Windows Audio Devices settings window. To get to that dialogue, open the Windows "Run" dialogue from the star menu, then paste in the following text and press return to open Audio Devices Properties:
mmsys.cpl

(2) Select "Recording" tab, and then select VAC from the devices > Properties > Listen tab and then tick "Listen to this device".

Alternatively, if you are using the original "VAC" by Eugene Muzychenko, then a useful addition can be his "Audio Repeater" for being able to monitor each VAC on speakers, for example, without needing to do the procedure I described above :

https://vac.muzychenko.net/en/repeater.htm

Lastly, in terms of general audio routing in Windows, have you seen Ear Trumpet? It's very useful.

Written by Microsoft team, it takes the pain out of constantly diving into Windows settings to change app sound routings (both playback and record routing from each source).

https://www.theverge.com/2018/6/13/1745 ... -audio-app

I use it to quickly toggle browser output (with a right click on slider after opening pop-up sys tray app) between speakers and VAC, exactly as you want:

https://www.microsoft.com/en-us/p/eartr ... blggh516xp

Ear Trumpet quick tutorial:


In terms of different audio from each of multiple tabs in Chrome, sorry I have no info on that, although from your comments, seems Audio Pick is now working for you anyway?

73

Max

skyking_comms
Posts: 22
Joined: Thu Aug 20, 2020 10:13 am

Re: Browser audio output plugin and online SDR

#6

Unread post by skyking_comms »

Thanks Max - I've sent you a private message as unfortunately I still have the issue after following your instructions / downloaded the software you mention

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