[Lowfer] A Question to Windows-7 users

[David L. Wilson]

VB Cable (better and free) and VAC primarily do is to allow one send the
output of one audio source to the input of another without using the PCs
audio card or audio cables.  An example, if you are using an SDR receiver on
a PC (such as an SDR-14 or similar), you can send that output directly to
Argo without using cables or the PC audio card. ( Windows mixer generally
will not let you do that s it thinks of devices in as simply either input or
output to the PC.  You can also at the same time, look at that output with
other decoders.    It makes what I have often done with cable and the mixer
primitive.

An example of something I could not do before.  Looking at a FM broadcast
station and wanting to look at the 57 kHz RDS signal with RDS Spy:

Old way:  Tap the discriminator of an FM receiver if I can figure out how,
send that to the mic input of a PC with at least a 2x 114 kHz sample rate
(many PC's cannot do).  Or sent the discriminator output to a VLF receiver
antenna connection, and send that' receiver's audio to the PC and run
RDSSpy.  Usually the second way with 2 receivers and a PC is needed.

New way:   SDR dongle (or AirSpy which is much better) on the USB port, run
HDSDR and set filter limits, set audio output of that to VB Cable input, set
VG cable to 192 kHz, set input of RDSSpy to output of VB Cable.  Much
simpler with 1 instead of two receivers, no audio card frequency limits, and
no cables.  

I can also send SDR-14 tuned to LF or VLF audio output (setting the output
to VB Cable)  directly to Argo inside the PC (select VB Cable output as the
source)--software to software-- using VB Cable.  Esentially, it allows one
to directly the "audio" output of one program directly to the "audio" input
of another program or several other programs.

( If W4DEX is around, to monitor a system he knows: using a $20 dongle, WFM
in free HDRSDR to VB Cable (using its WFM adjustable filter to filter
channel of interest) , and send that to free SDRSharp.  Used to take a lot
more to do that.  

After seeing all the things it could do, it is now on all my PCs and laugh
when I see people doing what I used to do.

--
David L. Wilson