Re: LF: Real time Audio frequency translation (software)

[Andy Talbot <andy.g4jnt@gmail.com>]

VAC - will probably let you do that.   You can set up several virtual sound cards and patch around on a virtual backplane

 

But why not get multiple sound cards and have all the flexibility of audio patching?   You only need a low cost headphone dongle (although avoid the 99p EBay ones - they are seriously grim!)    

 

Remember to isolate the DC on headphone output though - they often used a balanced output with +2V on the common headphone connector.  Mic-In has a real ground though

 

Andy

'jnt

 

On 1 October 2011 19:16, Graham <g8fzk@g8fzk.fsnet.co.uk> wrote:

Spec-lab  .. but  can an application  'look'  at  spec-lab   as if it  was a  sound card ......without the  need  for a second card and a  wire  jumper  ?

From: Andy Talbot

Sent: Saturday, October 01, 2011 7:09 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: Real time Audio frequency translation (software)

I suspect Spectrum lab can doi.  

 

You could also run one of the SDR radio packages, receiving in the range 0 - 20kHz ish and generating SSB    

Use VAC, or better, an additional soundcard with the audio wrapped-round

 

Or an external LF mixer (see the latest  RadCom :-)

 

Andy

www.g4jnt.com

 

On 1 October 2011 18:44, Graham <g8fzk@g8fzk.fsnet.co.uk> wrote:

Is there  a  simple   way  to  translate   audio   frequency in real  time  ..???

 

There are  'Bat translators'    Ultrasonic to  base  band ..

 

But  say  you  have   12 KHz   of audio  and  want to  present this to  say ...  wspr... at  1500 Hz . or  some other system at  say  2 KHz

 

Is there a  'virtual'  mixer   that  could be  installed as  some  sound  card or  similar ?

 

Tnx

 

Graham ..