Error caused by unauthorized operation of USB audio device.

Skip to first unread message


Jan 22, 2024, 6:54:24 PMJan 22
to digitalvoice
Hi  Mooneer,
I have found that running FDV with the USB audio headset disabled causes an assertion error in the dialog selection.

This was simply caused by me starting FDV forgetting that I had temporarily unplugged the USB headset, so I will tell you that this would not normally be the case.
(It was the same message as the YAMAHA AG3,USBdevice I reported earlier. Fig.3)

(1) Set USB audio device by AUDIOCONFUG of FDV, and START/STOP the software.
(2) Remove the USB audio device from the PC.
(3) Start FDV, START, the message shown in Fig. 1 pops up, select OK, and stop FDV.
(4) Start FDV again, START, an assertion error occurs, and the message shown in Fig.2 appears.

It changes further when I select 3 of the dialogs in Fig 2.
 (4-1) Select OK to exit.
 (4-2) When "Retry" is selected, the program abruptly terminates.
 (4-3) If, I choose Ignore, the program abruptly terminates after displaying a series of errors. Fig. 3

Thank you.


Mooneer Salem

Jan 24, 2024, 4:39:44 AMJan 24
Hi Yuichi,

I'm currently working on getting FreeDV to work better with sound devices capable of higher sample rates and more than two channels. Does the version at work better for you? (No installer, just unzip the file and run the freedv.exe that's inside.)


-Mooneer K6AQ

You received this message because you are subscribed to the Google Groups "digitalvoice" group.
To unsubscribe from this group and stop receiving emails from it, send an email to
To view this discussion on the web visit


Jan 26, 2024, 2:06:41 PMJan 26
to digitalvoice
Hi, Mooneer.

Sorry for the delay in checking.
Thanks for the new test version. It is very good.
I confirmed, that there is no system crash.


2024年1月24日水曜日 18:39:44 UTC+9 Mooneer Salem:
Reply all
Reply to author
0 new messages