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<DIV><FONT face=Arial size=2>Well, I don't normally use MIDI, so I'm not
totally sure that I know what we're talking about here. The
Yamaha G50 apparently has three MIDI "modes": "Multi-Channel",
"Single-Channel Polyphonic", and "Monophonic". From what I understand of
this, in Multi mode, it does what you are talking about - sends data from each
string over a unique MIDI channel. In Single-channel Poly mode, I think it
does the merging for you. Obviously the Mono mode just allows one
note/string at a time to be sounded. So I guess in relation to using the
guitar and the G50 with a MIDI-CV converter, I would only have to worry about
the Trigger question in Single Channel Poly mode. But that still doesnt
answer the question of how the converter interprets a sequence of events in
which one note is on and another note on is recieved. I.E., how does it
turn this sequence of MIDI events into analog control signals? Thats what
Im really after. After all, I would eventually be using the converter for
keyboard use as well - not just with the Yamaha guitar controller.
</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>Dave</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A href="mailto:weareas1@earthlink.net" title=weareas1@earthlink.net>Michael
Bacich</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A href="mailto:polaris30@ncx.com"
title=polaris30@ncx.com>D A F</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, March 04, 2006 3:05
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [sdiy] MIDI to CV question -
no Triggers?</DIV>
<DIV><BR></DIV><BR>
<DIV>
<DIV>On Mar 4, 2006, at 9:51 AM, D A F wrote:</DIV><BR
class=Apple-interchange-newline>
<BLOCKQUOTE type="cite">
<P style="MARGIN: 0px"><FONT face=Helvetica size=3
style="FONT: 12px Helvetica">Yes, I guess the problem is: What happens when
you are holding one note and</FONT></P>
<P style="MARGIN: 0px"><FONT face=Helvetica size=3
style="FONT: 12px Helvetica">then press down a second note without letting
the first one up?</FONT></P></BLOCKQUOTE></DIV><BR>
<DIV>This would not be an issue when using the MIDI-CV with a polyphonic MIDI
guitar controller. Although the guitar is a six-note polyphonic
instrument, guitar strings are inherently monophonic. That is to say, on
a guitar, it is not possible to play two notes simultaneously on one
string. Or potting it another way, you can't "press down a second note
without letting the first one up". </DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>Typical guitar-to-MIDI controllers (such as the Yamaha G50 and the Roland
GR units) transmit each string's note information on a separate MIDI channel,
which would necessitate the use of a separate monophonic MIDI-CV converter for
each string. Such a system would also require hardware for six complete
analog synthesizer voices. This may explain why we don't often see
people using guitars as controllers for their analog synth gear.</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>If you wish to use the guitar to play a monophonic analog system, you
will have two choices: Either you must restrict yourself to playing on
only one string, or you must re-channelize the six-channel MIDI info coming
from the guitar so that it all comes out on the same MIDI channel. This
could be done with some kind of external MIDI processing device, such as a
MOTU MIDI Time Piece II. However, this would necessarily open up a
stinky can of Pandora's Worms, in terms of some potential MIDI problems and
some note and trigger assignment problems -- for instance: What happens
if you play two notes at once? What happens if you play a note, then the
same note on two different strings? What if you don't completely release
the first note before hitting the next? Which note takes Note-On and/or
Note-OFF precedence? Which note's Velocity takes precedence? What
if you bend a note or notes? And getting back to the original question, what
happens with triggers and gates if you press a second note without letting the
first one up? ...there are other potential problems, too.</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV>Harry Bissell has opened that can of worms many times, and has come up
with various solutions for most of the inherent problems -- none of them
involving MIDI, though. Check out his "Muffy" guitar to CV converter for
more insight:</DIV>
<DIV><BR class=khtml-block-placeholder></DIV>
<DIV><A
href="http://www.bitshifted.com/SDIY2004/muffy.asp">http://www.bitshifted.com/SDIY2004/muffy.asp</A></DIV>
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