Cluster sound alerts, how can I disable them?

[EC5A]

Hello everybody,

I have the cluster window on, because I like going fast to the new ones I can see on it, but I have a problem with the sound alerts: I'm not able to disable them. I have taken a look at the manual, and I could find how to select one or another, but I didn't find how to disable, summarizing, I don't want any sound alert on my computer, and I don't want to shut down my sound.

I have only one sound card that I use for my JTDX program. What's happening? Well, when I receive any spot that's a new one, one female voice annouce it, but as I have only a shared sound card, this sound goes thru the JTDX to the air, and I can hear, perfectly and clearly the spot.

How can I disable the sound on the cluster?

Thanks a lot in advance for your help.

Best regards
Luis, EC5A