audio noise

[Daniel Curry]

 I need in for if I can shut off the audio that is coming from my radio
or computer when I am transmitting FREEDV. I am hearing a wobbling
sound. I have turn the radio speaker control to off and that did not
help.  The sound is loud that it can be heard when I am transmitting via
my computer mic.

K6DLC

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Daniel Curry A.A., B.A
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[Mooneer Salem]

Hi Daniel,

If you mute your speakers on your computer before transmitting, do you still hear this sound? If so, it might be RF getting into your speakers and the usual RF mitigation strategies (adding ferite beads, etc.) will help.

Thanks,

-Mooneer K6AQ

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[Dudley Hurry]

Daniel,

To add what Mooneer said , you Might want to check that you have the monitor turned off, do a right click on the PTT button, make sure it’s off.   But if you have noise coming from the speakers when off , several chokes on the speaker leads should help, if you have other strange things in the shack , look for a “common mode choke “ for your feed line before getting to your shack.   Backed up RF is a killer for things in the shack.

73,

Dudley

WA5QPZ

Sent from my iPhone

On Nov 30, 2025, at 5:29 PM, Mooneer Salem <moo...@gmail.com> wrote:



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[Víctor José Sánchez Escribano]

Hi all,

with my transceiver Yaesu FT-847 I'm suffering the same issue. When I TX with or without external speaker connected is sounds a weird noise althought the TX power is zero. I've dispose several ferrites in the speaker cable but the problem persists. The internal speaker of the 847 not suffer this issue. 

In my FT-857D I've fixed enable the FreeDV option "Use USB/LSB instead of DIGU/DIGL" (I don't understand why but it works) but with the 847 couldn't be (https://groups.google.com/g/digitalvoice/c/MUGPbmary0A/m/gU8FR89NAAAJ)

Any suggestion?

Thanks and Merry Christmas.

[Mooneer Salem]

You may need to disable Audio Enhancements, possibly for all audio devices on your system. See https://support.microsoft.com/en-us/topic/disable-audio-enhancements-0ec686c4-8d79-4588-b7e7-9287dd296f72 for instructions on how to do that. Let me know if you're still having this problem after doing so.

-Mooneer K6AQ

To view this discussion visit https://groups.google.com/d/msgid/digitalvoice/01c1a575-20a1-4efb-96f5-744d62df32c7n%40googlegroups.com.

[Víctor José Sánchez Escribano]

Hi Mooner,

I'm using FreeDV on Linux. I'm trying to use without external speaker again or with another speaker.

Thanks.

[Mooneer Salem]

Oops, I missed that part, sorry. Are you able to open up pavucontrol and confirm that FreeDV is using the correct devices there? If not, you should be able to select the correct devices from pavucontrol and have FreeDV automatically update its configuration accordingly.

-Mooneer K6AQ

To view this discussion visit https://groups.google.com/d/msgid/digitalvoice/ab7b4a1e-94f7-45ea-86b2-07550e3aadb2n%40googlegroups.com.