[Elecraft] USB Sound Card

[Mark Goldberg]

I use a U7 with the KX3 and HDSDR. There is an issue with the
initialization of the 24 bit drivers. I have set up for 24 bits, 192 kHz
and line in using the Asus software, and 24 bits and 192 kHz in Windows
control panel. When I turn the computer on and use HDSDR for the first time
I have to do the following:

Start up HDSDR and select Start.
In HDSDR switch to 16 bit drivers.
In HDSDR switch back to 24 bit drivers.
In HDSDR select bandwidth and switch the output bandwidth to 192 kHz and
back to 12 kHz for the small waterfall. The input remains 192 kHz.
In HDSDR close the bandwidth box.
In HDSDR hit Stop and then Start

After all that it works until the computer is shut down or the computer
sleeps.

If the computer sleeps, in HDSDR hit Stop and then Start if the spectrum is
backwards (moves the wrong way when you tune) or is mirrored around the
center.

Other than the annoyance above, it works well. I just live with the "dance"
at startup.

Hope this helps

73,

Mark
W7MLG


On Sun, Mar 6, 2016 at 6:04 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:

> Tom,
>
> If the problem is only happening when the Asus U7 is the default
> soundcard, then how do you deal with the tendency of the Windows operating
> system to set any newly installed soundcard as the default?  Seems like a
> "catch 22" to me.
> Yes, the specs on the Asus U7 are very good, but for panadapter use, it
> needs the 192 kHz bandwidth.
>
> 73,
> Don W3FPR
>
>
> On 3/6/2016 7:05 PM, tomb18 wrote:
>
>> That's strange. Never heard a single issue with the Asus u7 stuck at 48
>> and i know of many many people using them. The only reason that happens is
>> that people often set the card as the default sound card which should not
>> be done.
>> The u7 in my experience, is the quietest and least likely to have Spurs.
>> Cards to stay away from now a days with win10 are the emu cards. Upgrades
>> to win10 may work but not fresh installs. Drivers are at least 4 years old
>> and still beta.
>> Tom
>> va2fsq.com
>>
>>
>>
>>
>> Sent from my Samsung Galaxy smartphone.
>> -------- Original message --------
>> From: Don Wilhelm <w3fpr at embarqmail.com>
>> Date: 2016-03-06 6:53 PM (GMT-05:00)
>> To: Tom Field <docwatt at gmail.com>, elecraft at mailman.qth.net
>> Subject: Re: [Elecraft] USB Sound Card
>>
>> Tom,
>> Tom,
>>
>> If you want to use the soundcard for panadapter applications, then go
>> with the recommendations on the LP-Pan site, but there are several users
>> that have been reporting that the ASUS U7 reverts to 48k and there does
>> not seem to be a solution.  The ASUS U5 does not seem to share that
>> problem.  In addition to the bandwidth of the card, the noise floor and
>> the lack of a zero frequency spur are important considerations.
>> Look at the LP-Pan Yahoo Group for a lot of comments.
>>
>> If your soundcard will be used for digital modes only, then you do not
>> need a 'top of the line' soundcard, most any will do.
>> But the LP-Pan website can still be an assist in selecting one - look at
>> the noise level on the various cards to find the better ones for
>> soundcard digital mode use.  The internal soundcard in your computer may
>> prove to be adequate, but turn off the sounds generated by your OS if
>> you use the internal card so you do not transmit those sounds.
>>
>> 73,
>> Don W3FPR
>>
>> On 3/6/2016 5:51 PM, Tom Field wrote:
>> > I’ve looked at the L-pan site and they recommend the ASUS USB sound
>> cards. Reviews on Amazon and NewEgg are pretty negative. What are the
>> group’s recommendations for a USB sound card interface with the K2 and KkX3:
>> >
>>
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