[WT-support] XP + MicroHAM problem

[Joe Subich, W4TV]

> I don't understand exactly how that could work unless Win-Test used
> special protocol commands to switch microHAM audio inputs back and
> forth.

There is no protocol involved with sound card switching.  The mic is
always connected to the sound card microphone input and the Line is
always connected to the sound card Line Input.  The two inputs are
physically separate.

The *application* is responsible for opening the appropriate source
for input.  In Windows XP, the application also needs to manipulate
the controls of the sound card multiplexer (select/mute).  In Vista
and Windows 7, the operating system handles the mute/select controls
in the hardware abstraction layer and the application sees each
input (or output) as a separate device.

73,

    ... Joe, W4TV


On 2/23/2012 4:11 AM, Bob Wilson, N6TV wrote:
> On Feb 23, 2012 1:02 AM, "Simon Schelkshorn"<simon at schelkshorn.de>  wrote:
>> That is wrong! I have used the MKII serveral times as an external
> Vocie-Keyer in the past and was able to
>> record the messages just by pressing Shift-Fx.
>
> OK, thanks.  I only have the MK2R+, so maybe the MKII works differently.
>
>> Also here, that should work! I know that there is sometimes some
> unpredictable behaviour with the MKII
>> but basically when using the MKII built in soundcard for the contest
> recorder the line input should be automatically
>> selected. When using it together with the internal DVK is should
> automatically switch over to the microphone
>> when pressing Shift-Fx to record a message and then back to the line
> input. Of course when playing back a
>> message the recorded audio will be muted during that time.
>
> I don't understand exactly how that could work unless Win-Test used special
> protocol commands to switch microHAM audio inputs back and forth.
>
>> I will try to test again
>> this weekend when in CQ160 SSB. If everything works as described above, I
> will make some screenshots
>> to put in the wiki.
>
> That would be very helpful Simon, thank you.
>
> 73,
> Bob, N6TV
>
>
>
>
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