To: rsgb_lf_group@blacksheep.org
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From: Terry G0EZY <GW0EZY@sky.com>
Message-ID: <0f9558b4-457d-a395-58c9-7f9be3393cdd@sky.com>
Date: Tue, 13 Jun 2017 17:57:32 +0100
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Subject: Re: LF: Octo-soundcard for the Raspi
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Markus

Sorry you missed the Octo, I'm sure another batch will be released soon.

The designers, Flatmax, offer a discussion forum at:

  http://www.flatmax.org/phpbb/viewforum.php?f=9

The most recent post is "where to buy this Octo card?" Unfortunately the 
Flatmax answer is Amazon UK or USA....

You could try the forum for the 96/192 sample rate question. Otherwise 
Paul may be able to answer. A similar thing was found with another 
multi-channel sound card (Lexicon Omega) that had a 96 kHz chip but 
offered only 48 kHz max sample rate, so it might not be an RaPi issue.

73 Terry

On 13/06/2017 16:41, Markus Vester wrote:
> Hi Terry, Stefan,
>
> yes, seeing Paul's encouraging results on the VLF_Group thread 
> (https://groups.yahoo.com/neo/groups/VLF_Group/conversations/messages/25666 
> and earlier posts) made me want to try it out myself. But it looks 
> like I came too late :-( Anyway it will be interesting to follow your 
> progress towards coherent multichannel VLF reception.
>
> BTW the Octo card is specified to 96 kHz samplerate, even though the 
> data sheet says that the chip could do up to 192 kHz - would that be 
> limited by RasPi SPI bandwidth?
>
> Best 73,
> Markus
>
> -----Ursprüngliche Mitteilung-----
> Von: DK7FC <selberdenken@posteo.de>
> An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
> Verschickt: Di, 13. Jun 2017 15:17
> Betreff: Re: LF: Octo-soundcard for the Raspi
>
> Hi all,
>
> Since a few minutes, the octo soundcard became part of my portable 
> VLF/ULF recorder based on the Raspi.
> I did not follow the dicsuccions on the yahoo groups.
> For now i can tell that the soundcard is based on the chipset 
> CS42440-DQZ, see the data sheet at 
> https://d3uzseaevmutz1.cloudfront.net/pubs/proDatasheet/CS42448_F5.pdf
>
> I'm looking forward to the first tests.
>
> BTW i got an idea how to solve the problems with portable operation of 
> the Raspi when using vlfrx tools. vlfrx tools needs a 1PPS reference 
> and the ntpd service to generate a timestamp. But in portable 
> operation there is no internet access, so no tracking of the clock 
> time. After shutting down and restarting the raspi, the clock has an 
> offset, it continues with the time just before the shut down. So 
> that's the problem. BUT! The GPS module provides NMEA informations 
> containing the current date and time. It can be connected to the 
> serial input of the Raspi. I assume there are already available 
> scripts which periodically set the Raspi clock from the data received 
> from the GPS module via the serial interface!
> Probably i'm not the first one who got this idea, but that doesn't 
> matter :-)
>
> Images of the old and new version...
>
> https://www.dropbox.com/sh/55o7vyie5yo02m2/AAA-tCIYAGmu2YeCdbWNr7MJa?dl=0
>
> 73, Stefan
>
>
>
> Am 13.06.2017 14:52, schrieb Terry G0EZY:
>
>     When Stefan posted the Amazon UK link on 5th June, there were 5
>     available in the UK. Stefan, Paul and I bought one each - not sure
>     where the others went!
>
>     Have you been following Paul's tests with his vlfrx tools and
>     RaPi/Octo setup on  the Yahoo VLF Group (not the RSGB vlf group)?
>
>     After getting successful crowd funding for the Octo project, it
>     seems crazy to release such a small batch. Although all those that
>     backed the project with a donation got one or more boards
>     depending on how much invested. Maybe that exhausted the interest?
>
>     Flatmax org has another RaPi audio project asking for funding -
>     according to one post on the VLF group, it could have a facility
>     for external timing oscllator injection.
>
>     Terry
>
>
>     On 13/06/2017 12:25, Markus Vester wrote:
>
>         Looks like they're sold out on amazon.uk. Still available in
>         the US but unfortunately they won't ship to Germany. Does
>         anyone know another source?
>
>         Markus (DF6NM)
>
>
>         -----Ursprüngliche Mitteilung-----
>         Von: DK7FC <selberdenken@posteo.de>
>         <mailto:selberdenken@posteo.de>
>         An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
>         <mailto:rsgb_lf_group@blacksheep.org>
>         Verschickt: Mo, 5. Jun 2017 16:39
>         Betreff: Re: LF: Octo-soundcard for the Raspi
>
>         Hi all,
>
>         Oh, now it is available at amazon UK:
>         https://www.amazon.co.uk/Octo-channel-sound-card-Raspberry/dp/B06Y3PZ6MF
>
>         But not in DL...
>
>         73, Stefan
>
>         Am 31.05.2017 15:05, schrieb DK7FC:
>         > Hi all,
>         >
>         > Does someone tried the new octo-coundcard with 6 inputs for
>         the Raspi?
>         > There is a forum link:
>         >
>         http://www.flatmax.org/phpbb/viewforum.php?f=9&sid=38d2f3c26e926886b446abdadb011928
>
>         >
>         > It looks like they are available in the US now. As far as i
>         can see
>         > there's still nothing in UK or DL...
>         >
>         > 73, Stefan
>         >
>
>


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    <p>Markus</p>
    <p>Sorry you missed the Octo, I'm sure another batch will be
      released soon. <br>
    </p>
    The designers, Flatmax, offer a discussion forum at:<br>
    <br>
     <a class="moz-txt-link-freetext" href="http://www.flatmax.org/phpbb/viewforum.php?f=9">http://www.flatmax.org/phpbb/viewforum.php?f=9</a><br>
    <br>
    The most recent post is "where to buy this Octo card?" Unfortunately
    the Flatmax answer is Amazon UK or USA....<br>
    <br>
    You could try the forum for the 96/192 sample rate question.
    Otherwise Paul may be able to answer. A similar thing was found with
    another multi-channel sound card (Lexicon Omega) that had a 96 kHz
    chip but offered only 48 kHz max sample rate, so it might not be an
    RaPi issue.<br>
    <br>
    73 Terry<br>
    <br>
    <div class="moz-cite-prefix">On 13/06/2017 16:41, Markus Vester
      wrote:<br>
    </div>
    <blockquote type="cite"
      cite="mid:15ca21dc75e-1e15-bcda@webprd-m105.mail.aol.com">
      <div
style="font-size:10pt;font-family:arial,helvetica,sans-serif;color:black;">
        <div style="color: black; font-family:
          arial,helvetica,sans-serif; font-size: 10pt;">Hi Terry,
          Stefan,<br>
          <br>
          yes, seeing Paul's encouraging results on the VLF_Group thread
(<a class="moz-txt-link-freetext" href="https://groups.yahoo.com/neo/groups/VLF_Group/conversations/messages/25666">https://groups.yahoo.com/neo/groups/VLF_Group/conversations/messages/25666</a>
          and earlier posts) made me want to try it out myself. But it
          looks like I came too late :-( Anyway it will be interesting
          to follow your progress towards coherent multichannel VLF
          reception.<br>
          <br>
          BTW the Octo card is specified to 96 kHz samplerate, even
          though the data sheet says that the chip could do up to 192
          kHz - would that be limited by RasPi SPI bandwidth?<br>
          <br>
          Best 73,<br>
          Markus<br>
          <br>
          -----Ursprüngliche Mitteilung----- <br>
          Von: DK7FC <a class="moz-txt-link-rfc2396E" href="mailto:selberdenken@posteo.de">&lt;selberdenken@posteo.de&gt;</a><br>
          An: rsgb_lf_group <a class="moz-txt-link-rfc2396E" href="mailto:rsgb_lf_group@blacksheep.org">&lt;rsgb_lf_group@blacksheep.org&gt;</a><br>
          Verschickt: Di, 13. Jun 2017 15:17<br>
          Betreff: Re: LF: Octo-soundcard for the Raspi<br>
          <br>
        </div>
        <div id="AOLMsgPart_2_d4db0cb0-0b5e-4250-93c7-140a61ed623c">
          <div class="aolReplacedBody" text="#000000" bgcolor="#ffffff">
            Hi all, <br>
            <br>
            Since a few minutes, the octo soundcard became part of my
            portable
            VLF/ULF recorder based on the Raspi.<br>
            I did not follow the dicsuccions on the yahoo groups.<br>
            For now i can tell that the soundcard is based on the
            chipset
            CS42440-DQZ, see the data sheet at
            <a class="aolmail_moz-txt-link-freetext"
href="https://d3uzseaevmutz1.cloudfront.net/pubs/proDatasheet/CS42448_F5.pdf"
              target="_blank" rel="noopener noreferrer"
              moz-do-not-send="true">https://d3uzseaevmutz1.cloudfront.net/pubs/proDatasheet/CS42448_F5.pdf</a><br>
            <br>
            I'm looking forward to the first tests.<br>
            <br>
            BTW i got an idea how to solve the problems with portable
            operation of
            the Raspi when using vlfrx tools. vlfrx tools needs a 1PPS
            reference
            and the ntpd service to generate a timestamp. But in
            portable operation
            there is no internet access, so no tracking of the clock
            time. After
            shutting down and restarting the raspi, the clock has an
            offset, it
            continues with the time just before the shut down. So that's
            the
            problem. BUT! The GPS module provides NMEA informations
            containing the
            current date and time. It can be connected to the serial
            input of the
            Raspi. I assume there are already available scripts which
            periodically
            set the Raspi clock from the data received from the GPS
            module via the
            serial interface!<br>
            Probably i'm not the first one who got this idea, but that
            doesn't
            matter :-)<br>
            <br>
            Images of the old and new version...<br>
            <br>
            <a class="aolmail_moz-txt-link-freetext"
href="https://www.dropbox.com/sh/55o7vyie5yo02m2/AAA-tCIYAGmu2YeCdbWNr7MJa?dl=0"
              target="_blank" rel="noopener noreferrer"
              moz-do-not-send="true">https://www.dropbox.com/sh/55o7vyie5yo02m2/AAA-tCIYAGmu2YeCdbWNr7MJa?dl=0</a><br>
            <br>
            73, Stefan<br>
            <br>
            <br>
            <br>
            Am 13.06.2017 14:52, schrieb Terry G0EZY:
            <blockquote cite="about:blank">
              <p>When Stefan posted the Amazon UK link on 5th June,
                there were 5
                available in the UK. Stefan, Paul and I bought one each
                - not sure
                where the others went!</p>
              <p>Have you been following Paul's tests with his vlfrx
                tools and
                RaPi/Octo setup on  the Yahoo VLF Group (not the RSGB
                vlf group)? <br>
              </p>
              <p>After getting successful crowd funding for the Octo
                project, it
                seems crazy to release such a small batch. Although all
                those that
                backed the project with a donation got one or more
                boards depending on
                how much invested. Maybe that exhausted the interest?</p>
              <p>Flatmax org has another RaPi audio project asking for
                funding -
                according to one post on the VLF group, it could have a
                facility for
                external timing oscllator injection. <br>
              </p>
              <p>Terry<br>
              </p>
               <br>
              <div class="aolmail_moz-cite-prefix">On 13/06/2017 12:25,
                Markus Vester wrote:<br>
              </div>
              <blockquote cite="about:blank">
                <div style="color: black; font-family:
                  arial,helvetica,sans-serif; font-size: 10pt;">
                  <div style="color: black; font-family:
                    arial,helvetica,sans-serif; font-size: 10pt;">Looks
                    like they're sold out on amazon.uk. Still available
                    in the US but
                    unfortunately they won't ship to Germany. Does
                    anyone know another
                    source?<br>
                    <br>
                    Markus (DF6NM)<br>
                    <br>
                    <br>
                    -----Ursprüngliche Mitteilung----- <br>
                    Von: DK7FC <a class="aolmail_moz-txt-link-rfc2396E"
                      href="mailto:selberdenken@posteo.de"
                      target="_blank" rel="noopener noreferrer"
                      moz-do-not-send="true">&lt;selberdenken@posteo.de&gt;</a><br>
                    An: rsgb_lf_group <a
                      class="aolmail_moz-txt-link-rfc2396E"
                      href="mailto:rsgb_lf_group@blacksheep.org"
                      target="_blank" rel="noopener noreferrer"
                      moz-do-not-send="true">&lt;rsgb_lf_group@blacksheep.org&gt;</a><br>
                    Verschickt: Mo, 5. Jun 2017 16:39<br>
                    Betreff: Re: LF: Octo-soundcard for the Raspi<br>
                    <br>
                  </div>
                  Hi all,<br>
                  <br>
                  Oh, now it is available at amazon UK: <br>
                  <a
href="https://www.amazon.co.uk/Octo-channel-sound-card-Raspberry/dp/B06Y3PZ6MF"
                    target="_blank" rel="noopener noreferrer"
                    moz-do-not-send="true">https://www.amazon.co.uk/Octo-channel-sound-card-Raspberry/dp/B06Y3PZ6MF</a><br>
                  <br>
                  But not in DL...<br>
                  <br>
                  73, Stefan<br>
                  <br>
                  Am 31.05.2017 15:05, schrieb DK7FC:<br>
                  &gt; Hi all,<br>
                  &gt;<br>
                  &gt; Does someone tried the new octo-coundcard with 6
                  inputs for the
                  Raspi?<br>
                  &gt; There is a forum link: <br>
                  &gt; <a
href="http://www.flatmax.org/phpbb/viewforum.php?f=9&amp;sid=38d2f3c26e926886b446abdadb011928"
                    target="_blank" rel="noopener noreferrer"
                    moz-do-not-send="true">http://www.flatmax.org/phpbb/viewforum.php?f=9&amp;sid=38d2f3c26e926886b446abdadb011928</a>
                  <br>
                  &gt;<br>
                  &gt; It looks like they are available in the US now.
                  As far as i can
                  see <br>
                  &gt; there's still nothing in UK or DL...<br>
                  &gt;<br>
                  &gt; 73, Stefan<br>
                  &gt;<br>
                  <br>
                </div>
              </blockquote>
              <br>
            </blockquote>
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