I've been through countless control panels and sound card control
apps, trying both line in and mic, looking for the secret sauce to
get MMTTY to see separate channels, and I've only gotten a couple of
them to actually behave that way.
Jeff, there is no "secret sauce" ... you need to look at the specs of
the "dongle" if the manufacturer/vendor supplies them. Some are built
using a single chip USB CODEC designed for headset operation - those
have a mono (mic) input and will often identify the input as "headset
mic" in Windows 7. Others are built using a stereo input version of
the USB chip and will typically not include the preamp (stereo line
inputs).
The quickest way to tell if a given dongle will support stereo receive
is to see if the "Default Format" (Windows 7 Sound Control Panel -
Recording Devices / Advanced tab) can be set for two channels. If the
particular dongle displays only single channel options, you have a
headset adapter.
73,
... Joe, W4TV
On 12/11/2012 6:14 PM, Jeff Stai wrote:
I've played with several USB sound cards of all shapes, sizes, and prices.
They all play well with MMTTY and by extension Writelog, if you are just
using a single audio stream ("mono").
However, I have had relatively poor luck with specific sound cards when I
want to utilize the separate left and right channels to decode independent
receivers - even though the sound card is billed as a stereo card having
stereo inputs.
It seems as if there is a subset of cards which MMTTY is able to recognize
and utilize the Left and Right as independent channels, while the rest of
them it doesn't - they act like mono cards.
I've been through countless control panels and sound card control apps,
trying both line in and mic, looking for the secret sauce to get MMTTY to
see separate channels, and I've only gotten a couple of them to actually
behave that way.
- jeff wk6i
On Mon, Dec 10, 2012 at 1:38 PM, Dave Greig <daven3buo@att.net> wrote:
We were just talking in this group about low price USB Sound cards. I did
some looking on Ebay and Amazon and they can be found as cheap as $15.00.
Does anyone know what the quality is like?
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