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Date: Sun, 29 Dec 2013 14:25:27 +0100
From: wolf_dl4yhf <dl4yhf@freenet.de>
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Subject: Re: LF: VLF exciter / signal generation in Spectrum Lab
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Hello Graham,

Am 29.12.2013 14:04, schrieb Graham:
> Wolf,
> Q How to  configure  SL  as audio  frequency   changer ?
> say   1500 Hz to  8 KHz , or , 8100 to  8200   etc
> how is the  set  up  ?

The easiest way is using the 'narrowband filter', which can also shift 
frequencies.
Start by selecting 'Quick Settings' in the menu, then 'Other amateur 
radio modes', 'Narrow CW filter with adjustable xyz'. You can see the 
filter's passband on the main frequency scale, along with the 'zero 
beat' indicator similar to a web sdr. Grab the passband widh the mouse 
and move it to the 'source' frequency range. Alternatively, enter the 
frequency shift in numeric form on the filter control panel. Details:

http://www.qsl.net/dl4yhf/speclab/filters.htm#filter_controls_on_main_freq_scale


> will SL  appeared as a  sound  source  ?
It can, but unfortunately only as an ASIO device. Microsoft's 
ever-changing driver model is so utterly complex that I gave up writing 
my own 'multimedia driver'. Also I didn't feel like re-inventing the 
wheel for XP, Vista, Win7, Win8, and whatever-comes-next...  :o)  Thus 
the easiest (??) method would be to use Virtual Audio Cable.

The more complex (but VAC-less) way, if ASIO is supported by the 
audio-receiving application, is decribed in the 'Audio I/O' manual:

http://www.qsl.net/dl4yhf/AudioIO/AudioIO_Manual.pdf

The relevant chapter would be "Installation of in_AudioIO.dll as an ASIO 
device".


Now back to the soldering iron..

73,  Wolf .


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    <div class="moz-cite-prefix">Hello Graham,<br>
      <br>
      Am 29.12.2013 14:04, schrieb Graham:<br>
    </div>
    <blockquote cite="mid:3C87189CFA294757996FC9163E49543E@AGB"
      type="cite">
      <meta content="text/html; charset=ISO-8859-1"
        http-equiv="Content-Type">
      <meta name="GENERATOR" content="MSHTML 8.00.6001.23543">
      <div>Wolf,</div>
      <div>&nbsp;</div>
      <div>Q How to&nbsp; configure&nbsp; SL&nbsp; as&nbsp;audio &nbsp;frequency&nbsp;&nbsp; changer ?&nbsp;&nbsp; </div>
      <div>&nbsp;</div>
      <div>say&nbsp;&nbsp; 1500 Hz to&nbsp; 8 KHz , or , 8100 to&nbsp; 8200&nbsp;&nbsp; etc </div>
      <div>&nbsp;</div>
      <div>how is the&nbsp; set&nbsp; up&nbsp; ? <br>
      </div>
    </blockquote>
    <br>
    The easiest way is using the 'narrowband filter', which can also
    shift frequencies. <br>
    Start by selecting 'Quick Settings' in the menu, then 'Other amateur
    radio modes', 'Narrow CW filter with adjustable xyz'. You can see
    the filter's passband on the main frequency scale, along with the
    'zero beat' indicator similar to a web sdr. Grab the passband widh
    the mouse and move it to the 'source' frequency range.
    Alternatively, enter the frequency shift in numeric form on the
    filter control panel. Details:<br>
    <br>
<a class="moz-txt-link-freetext" href="http://www.qsl.net/dl4yhf/speclab/filters.htm#filter_controls_on_main_freq_scale">http://www.qsl.net/dl4yhf/speclab/filters.htm#filter_controls_on_main_freq_scale</a><br>
    <br>
    <br>
    <blockquote cite="mid:3C87189CFA294757996FC9163E49543E@AGB"
      type="cite">
      <div>&nbsp;</div>
      <div>&nbsp;</div>
      <div>will SL&nbsp; appeared as a&nbsp; sound&nbsp; source&nbsp; ?</div>
    </blockquote>
    It can, but unfortunately only as an ASIO device. Microsoft's
    ever-changing driver model is so utterly complex that I gave up
    writing my own 'multimedia driver'. Also I didn't feel like
    re-inventing the wheel for XP, Vista, Win7, Win8, and
    whatever-comes-next...&nbsp; :o)&nbsp; Thus the easiest (??) method would be
    to use Virtual Audio Cable.<br>
    <br>
    The more complex (but VAC-less) way, if ASIO is supported by the
    audio-receiving application, is decribed in the 'Audio I/O' manual:<br>
    <br>
    <a class="moz-txt-link-freetext" href="http://www.qsl.net/dl4yhf/AudioIO/AudioIO_Manual.pdf">http://www.qsl.net/dl4yhf/AudioIO/AudioIO_Manual.pdf</a><br>
    <br>
    The relevant chapter would be "Installation of in_AudioIO.dll as an
    ASIO device".<br>
    <br>
    <br>
    <br>
    Now back to the soldering iron..<br>
    <br>
    73,&nbsp; Wolf .<br>
    <br>
    <br>
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