[WT-support] Delay in MK2R+ monitor

[Joe Subich, W4TV]

I don't have time to write a tutorial on Windows audio.  Start with
the second option here: http://burianek.com/blog/archives/513 but
be careful with the Mic level as it can cause feedback issues.

The first option may work with MK2R+ but *will not work with MK II*
as it will prevent selecting the Line input.

In either case, you will need to check your levels carefully to
make sure they do not change and you do not generate feedback issues.

There are other issues at play - like buffer sizes, sample rates and
bit depth - which interact.  Lower sample rates/bit depth and larger
buffer sizes increase delay while higher sample rates/bit depth and
smaller buffer sizes can cause "skipping" or "Stuttering" if the CPU
gets heavily loaded (for example processing a heavy spot load).

73,

    ... Joe, W4TV


On 2014-10-24 10:37 AM, Toni Lindén wrote:
> Hi Joe & all!
>
> Did not quite understand yet what would be the exact actions to reduce
> the echo. I tried to look at Windows sound card settings, but found
> nothing relevant.
>
> 73 de Toni, OH2UA
>
>
>   > Somehow this seems to be Win7 and soundcard related issue. Any
>   > suggestions?
>
> Yes, it is related to your sound card settings in Windows.  The
> audio through the sound card must go through analog to digital
> conversion, encoding, decoding, and digital to analog conversion
> before reaching the transmitter *plus any monitor delay* in the
> transceiver.  You can adjust the Windows encoding settings (default
> format) to minimize the conversion/encoding delays (Windows Sound
> Control Panel).  Some transceivers (e.g., K3) have a "fast" monitor
> setting with no ADC/processing/DAC steps to reduce monitor delay.
>
> 73,
>
>      ... Joe, W4TV
>
> 2014-10-24 14:13 GMT+03:00 Toni Lindén <toni.linden at gmail.com>:
>> Hi there!
>>
>> I've noticed a remarkable delay in monitor sound when using MK2R+
>> connected to Win7 PC and having router "audio switching" set to CmCmCm
>> (so that mic is routed throw MK2R+ sound card).
>>
>> The delay makes it impossible to speak and monitor my TX at the same
>> time because brains get locked by delayed monitor audio.
>>
>> I can switch to CmCmA to avoid this problem, but then I can't use DVK
>> as efficient way as with CmCmCm. With CmCmCm I can eg. play report in
>> between my own speak without releasing foot switch.
>>
>> Somehow this seems to be Win7 and soundcard related issue. Any suggestions?
>>
>> 73 de Toni, OH2UA
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