Monday, July 14, 2025

(tr)uSDX headache

 I hope this post will help solving problems with the (tr)uSDX and connecting the computer with one USB cable for CAT and audio. It is also written for myself as reminder. Let's asume everything was working well. But for some reason, nothing works the next day. 


The above message was given loading the (tr)uSDX driver, which you should load before starting a digimode software program like WSJT-X or others. What is happening here, it was working yesterday? What should do? I removed all drivers, restarted the computer, installed the driver again. Still the same message. I even installed a new VB-cable version. Still the same. Suddenly it occured to me that the VB-cable could be in use by another program or device. And yes, it was. Right click on your soundsymbol reveals what source is used. In my case the VB-cable. It should be the normal internal soundcard.


Above is what it should look like. If the VB-cable is chosen the (tr)uSDX driver will not load correctly.


Above what you see when the everything is allright!

Next problem. VARA-HF which is used for Winlink and VarAC. Settings are correct. Both VB-cables are choosen in audiosettings. Transmit audio is correct (verified with another radio). But there is no RX audio. 



So far my solution is to plug in a microphone into the computer, in my case a headset. Then restart the (tr)uSDX driver and then start VARA-HF. It does receive now. After that I start VarAC which will try to start another instance of VARA-HF, ignore that. It is working now...
I guess it's the same problem with Windows assigning the VB-cable to be used by the computer instead of the (tr)uSDX driver just like with the soundcard problem I wrote above. I guess there is a better solution but my knowledge of Windows is just too limited.


4 comments:

PC1I said...

Why do you use VB-Cable with VARA-HF and VarAC, and the (tr)uSDX?

I've never used VB-Cable with USB sound card transceivers like the TS-590S, IC-7300, or FTdx10.
I'm not familiar with the (tr)uSDX, but what I've read is that it also acts as a USB sound card by default.

I only use VB-Cable when using RTL-SDR dongles or my Airspy R2 in combination with digital mode reception.

73 de Kees PC1I

PE4BAS, Bas said...

Hello Kees, the (tr)uSDX has no soundcard on board like te IC-7300 and others. It's a very basic radio. They had to change the firmware to get it working like this, with VB-cable. Which means several features from the original firmware were cut out. So it's a choice you have to make which firmware you will use. You can't compare this radio with Yaesu, Icom, Kenwood or others. 73, Bas

PC1I said...

Hi Bas, reactie in Engels en Nederlands wegens de instellingen en benamingen...
;-)

Hi Bas,

I was misled when I read in the manual that USB sound was available from Firmware 2.00u onwards. I just watched the video and see that the audio stream driver itself is set to use VB-Cable.

I think your initial problem was caused by the setting, that your laptop's sound card should be the default device, is being lost. This sometimes happens when you use a new audio device, or for some other, unclear, reason.

You can correct this in the sound card settings via the Control Panel. Launch Control Panel via the search box. Then click "Hardware and Sound" and then "Sound."
Then under "Playback," select the internal card and select "Set as Default" at the bottom center. If there is also a built-in microphone, do the same under the "Recording" heading.

Windows itself will then use these preference settings.

In the settings for the various software, you choose what you want to use at that moment. So the VB-Cable in and output or the IC-7300 In and output if that is what needs to be used.


Hi Bas,

ik was op het verkeerde been gezet doordat ik in de handleiding las dat er vanaf Firmware 2.00u USB geluid beschikbaar was. Heb net het filmpje gezien en zie dat de audio stream driver zelf naar VB-Cable.

Ik denk dat jouw initiele probleem veroorzaakt is door het wegvallen van de instelling dat je geluidskaart van de laptop de standaard device moet zijn. Dat gebeurt soms als je een nieuw audio device in gebruik neemt. Of om een andere, wazige, reden.

Dit kun je rechttrekken in de geluidskaart instellingen via het configuratiescherm. Via het zoekvak configuratiescherm opstarten. Dan "hardware en geluiden" klikken en daarna "Geluid"
Dan onder "afspelen" de interne kaart selecteren en onderaan in het midden "Als standaard instellen" kiezen. Als er ook een ingebouwde microfoon is hetzelfde doen onder de kop "opnemen".

Windows zal dan zelf deze instellingen gaan gebruiken.

Bij de instellingen van de diverse software kun je dan dat kiezen wat je op dat moment wilt gebruiken. Dus de VB-Cable in en output of de IC-7300 In en output als dat gebruikt moet worden.

73 de Kees PC1I

PE4BAS, Bas said...

Bedankt Kees, ik ga jou tip eens uitproberen. Soms zijn de dingen best ingewikkeld of ingewikkeld gemaakt. 73, Bas