Leandra Mac Lennan, AF1R, writes on the Wellesley ARS mailing list:
I will be doing an encore FreeDV Zoom and on-the air tutorial for WARS members on
- Monday, March 31
- 7:30 to 8:30 PM
If you missed last Monday’s meeting, you can join us for this meeting. I will cover the basic setup of FreeDV.
For those who were at last Monday’s meeting we will try the latest version of FreeDV to see how well the new vocoder works.
We will use 50.190 MHz for our on the air tests while we are on Zoom.
I recommend using a PC headset/microphone which plugs into a USB port on your computer. This will be used for the FreeDV audio. When you log into the Zoom meeting, use the computer internal speaker and microphone.
For the meeting I recommend you use the same computer for both Zoom and FreeDV. This will give you the ability to share your screen on Zoom if you have any problems so we can observe and debug any issues you may have.
I will focus the meeting on Windows operation as I am not familiar with Mac or Linux.
You must have a known-good method of connecting your computer to your radio. If you have used FT8 or FLDIGI successfully, you can use the same setup for FreeDV.
The latest version of FreeDV uses the AVX instruction set in the processor of your PC for the new high-quality vocoders. Most of the latest processors have the AVX instruction set.
Before the meeting please check to see if your processor has the AVX feature set. Follow the instructions in this web site
https://www.ghostarrow.com/how-to-know-if-my-cpu-supports-avx-instructions
If you have a Windows 11 computer and your processor has AVX, you may need to enable the AVX feature in your computer BIOS. Follow the instructions here (skip step 1, start at step 2) to enable AVX
[For Zoom details, contact Charlie Bures, WA3ITR, at c.bures@comcast.net]