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<div class="moz-cite-prefix">Addendum:<br>
<br>
I found that the suboctave comes later than the original tone,
when I raise the attack time ("Crescendo")<br>
<br>
<br>
Am 31.07.18 um 21:04 schrieb Florian Anwander:<br>
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<blockquote type="cite"
cite="mid:22c0ab9f-a482-3c84-5bd9-5ae26bf2b544@mnet-online.de">
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Hello,<br>
<br>
I have here a Crumar Performer for restauration which shows a
strange behaviour over the keyboard:<br>
<br>
In string mode some keys have an rectangle suboctave playing and
some don't.<br>
It does not matter whether I am in 8" or in 16" mode or have both
activated.<br>
In brass mode this suboctave is gone.<br>
<br>
There is no octave relation, which might have made the TDA1008
suspicious. Interchanging the TDA1008s also does not move the
behaviour to other notes.<br>
<br>
The service-manual is here:<br>
<a
href="http://www.florian-anwander.de/crumar_performer/CrumarPerformerServicemanual.pdf"
target="_blank" class="externalLink ProxyLink"
data-proxy-href="proxy.php?link=http%3A%2F%2Fwww.florian-anwander.de%2Fcrumar_performer%2FCrumarPerformerServicemanual.pdf&hash=8ea0e31df2595b5d6551c4e09c5733ad"
rel="nofollow" moz-do-not-send="true">http://www.florian-anwander.de/crumar_performer/CrumarPerformerServicemanual.pdf</a><br>
The datasheet for TDA1008 is here:<br>
<a
href="http://www.florian-anwander.de/crumar_performer/TDA1008_PhilipsSemiconductors.pdf"
target="_blank" class="externalLink ProxyLink"
data-proxy-href="proxy.php?link=http%3A%2F%2Fwww.florian-anwander.de%2Fcrumar_performer%2FTDA1008_PhilipsSemiconductors.pdf&hash=3b9bcab01a809bd74408e2f4dd98b00a"
rel="nofollow" moz-do-not-send="true">http://www.florian-anwander.de/crumar_performer/TDA1008_PhilipsSemiconductors.pdf</a><br>
The list which note has suboctave and which not:<br>
<a
href="http://www.florian-anwander.de/crumar_performer/CrumarPerformerSuboctave.txt"
target="_blank" class="externalLink ProxyLink"
data-proxy-href="proxy.php?link=http%3A%2F%2Fwww.florian-anwander.de%2Fcrumar_performer%2FCrumarPerformerServicemanual.pdf&hash=8ea0e31df2595b5d6551c4e09c5733ad"
rel="nofollow" moz-do-not-send="true">http://www.florian-anwander.de/crumar_performer/CrumarPerformerSuboctave.txt</a><br>
<br>
<br>
I have no idea where this suboctave might come from. Any
suggestions?<br>
<br>
<br>
Florian<br>
<pre class="moz-signature" cols="72">--
<a class="moz-txt-link-freetext" href="http://www.florian-anwander.de/" moz-do-not-send="true">http://www.florian-anwander.de/</a></pre>
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