not usually, most interfaces will plug in to the serial port parallel port, 
or USB port and can key the radio that way. The software does it with those 
ports and the interface will get the signal and key the radio. There are 
come out there you need vox for but I don't think any of the good ones 
require that.
----- Original Message ----- 
From: "Mark" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, December 09, 2008 11:53 AM
Subject: Re: sound cards


> Hi
>     Doesn't a person need some thing like a VOX unit when transmitting
> digital through a sound card? I have never figured out this part of 
> things.
>
> God bless,
> Mark
> ----- Original Message ----- 
> From: "Steve Forst" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, December 09, 2008 8:49 AM
> Subject: Re: sound cards
>
>
>> If you want to operate PSK or AFSK RTTY,  you  can have the screen reader
>> on
>> one card and  the digital software  on the other.    Using only 1 card 
>> you
>> have to be careful that  the screen reader voice doesn't go out over the
>> digital  output.    With 1 sound card, you can limit  how much the screen
>> reader speaks to avoid this problem or use something like Digitalk for 
>> PSK
>> which is self voicing.   I run RTTY in FSK mode which doesn't use the
>> soundcard for TX and so no problem.
>>
>> 73, Steve KW3A
>> ----- Original Message ----- 
>> From: "Richard Fiorello" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Tuesday, December 09, 2008 10:43 AM
>> Subject: sound cards
>>
>>
>>> Hello;
>>> I can't help asking.  What advantages do you find with two sound cards?
>>> Does it help with anything radio related?  I suppose it might help if 
>>> you
>>> were connecting the pc to your sound system.
>>> Richard
>>>
> -- Currently in Pendleton, Eastern Oregon Regional At Pendleton, Oregon
> Clear, 30.0°F Wind:S-170° at 7mph