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<div class="moz-cite-prefix">On 8/31/22 23:21, Bill Purvis wrote:<br>
</div>
<blockquote type="cite"
cite="mid:0747c6c6-5368-1ba0-1aa3-2b3f7077f75e@billp.org">On
01/09/2022 09:57, david wrote:
<br>
<blockquote type="cite">On 8/31/22 22:31, Will Godfrey wrote:
<br>
<blockquote type="cite">On Thu, 1 Sep 2022 09:33:11 +0200
<br>
Alexandre DENIS <a class="moz-txt-link-rfc2396E" href="mailto:contact@alexandredenis.net"><contact@alexandredenis.net></a> wrote:
<br>
<br>
<blockquote type="cite">On Wed, 31 Aug 2022 18:06:59 -1000
<br>
"David W. Jones" <a class="moz-txt-link-rfc2396E" href="mailto:gnome@hawaii.rr.com"><gnome@hawaii.rr.com></a> wrote:
<br>
<br>
<blockquote type="cite">Will a Yamaha expression pedal work
on a non-Yamaha MIDI keyboard? It
<br>
uses a stereo 1/4" plug.
<br>
<br>
Thanks!
<br>
</blockquote>
Hi,
<br>
<br>
Some expression pedals are wired with the pot on TRS, some
others use
<br>
RTS (i.e. wiper of the pot either on tip or ring). To make
things worse,
<br>
some use a lienar pot, some others use a log pot.
<br>
<br>
AFAIK Yamaha uses RTS wiring. On the other hand, most pedals
use TRS.
<br>
But in a lot of keyboards, the polarity is either tunable or
<br>
auto-detected.
<br>
<br>
The only advice is to test the pedal on the keyboard, or to
check in
<br>
its documentation.
<br>
<br>
-a.
<br>
</blockquote>
For this sort of thing, and testing leads, PSU polarity etc. a
small cheap
<br>
meter is invaluable. Takes all the guesswork out of it - so
you see what you
<br>
*actually* have, not what it says it has!
<br>
<br>
<br>
</blockquote>
I have a meter. Will just have to figure out how to test this
using it!
<br>
</blockquote>
David,
<br>
crude ASCII sketch of typical TRS pedal:
<br>
S R T
<br>
| | |
<br>
| V |
<br>
WWWWWWWWWWW
<br>
<br>
A RTS pedal simply re-labels R and T.
<br>
<br>
Set the pedal mid-way, set meter to KOhms, measure resistance
between sleeve and ring, sleeve and tip.
<br>
You should find one if about half of the other (if a log pot it
may be way off half, but at least less
<br>
than.) The lower reading is the slider. Either way, the best way
to test is to simply try it.
<br>
<br>
Bill
<br>
<br>
</blockquote>
<p><font face="Liberation Serif">Thanks, Bill.</font></p>
<p><font face="Liberation Serif">Now I just need to track down a
weighted, 88-key, MIDI controller with aftertouch and an
assortment of pitch bend wheels, knobs, sliders and pads.</font></p>
<p><font face="Liberation Serif">I was going to get an Akai MPK-88
several years ago, but they're no longer made, and Akai no
longer offers anything with 88 keys.<br>
</font></p>
<p>Others on the list:</p>
<p>M-Audio Hammer 88 Pro<br>
</p>
<p>StudioLogic SL88 Studio USB MIDI controller</p>
<p>Arturia KeyLab 88 USB MIDI Keyboard</p>
<p>I'm not looking for a synthesizer keyboard with its own sounds.</p>
<p>Ideas? </p>
<pre class="moz-signature" cols="72">--
David W. Jones
<a class="moz-txt-link-abbreviated" href="mailto:gnome@hawaii.rr.com">gnome@hawaii.rr.com</a>
authenticity, honesty, community
<a class="moz-txt-link-freetext" href="http://dancingtreefrog.com">http://dancingtreefrog.com</a>
"My password is the last 8 digits of π."</pre>
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