[sdiy-interim] MIDI guitar, the hard way

[David Moylan]

Ah yes, right again Harry.  I guess the split frets would be the only
solution to that.


harrybissell at copper.net wrote:
> Nice but no cigar...
> 
> The strings will STILL short because the
> contact at the frets carries them across as soon
> as you finger them...
> 
> Think of strings as being conductive in the Y axis and the
> frets conductinve in the x axis... as soon as you finger
> a string, you contacted two frets... finger a second string
> on an adjacent fret and you create the ball of string..
> 
> You have the one advantage that you do not expect the
> thing to still be a guitar
> 
> H^) harry
> 
> 
> 
> 
> 
>>
>> ---- Original Message ----
>> From: dave at westphila.net
>> To: harrybissell at copper.net
>> Subject: Re: [sdiy-interim] MIDI guitar, the hard way
>> Date: Mon, 26 Mar 2007 12:01:11 -0400
>>
>>> I think the solution here is to isolate the strings from each other
>> at
>>> the bridge and at any other metal pieces (tailpiece).  I had a 70's
>>> Gibson ES-150DC that had nylon saddles in the bridge which would
>> solve
>>> the bridge problem.  The tailpiece issue remains....
>>>
>>> harrybissell at copper.net wrote:
>>>> Don't know if this is obvious but your
>>>> string / fret switch must be monophonic
>>>> (you can only fret one string at a time)
>>>>
>>>> The issue is that the strings make TWO
>>>> contacts, one toward the bridge, and another
>>>> toward the nut.
>>>>
>>>> Play any chord and you will see that most of them
>>>> would short a number of strings across a number
>>>> of frets... making an almost undecipherable mess.
>>>>
>>>> Roland has a patent using current transformers
>>>> build into the frets that might possibly work well
>>>> but would be hell for a DIY approach.  Might use
>>>> Hall effect these days, still tough....
>>>>
>>>> I'd look for a old G-Vox hex guitar pickup, used.
>>>> Cheapest way I can think of to get the amplitude
>>>> sensing...
>>>>
>>>> And if the system is really monophonic... why not use the
>>>> main pickups for amplitude ?
>>>>
>>>> Its a really tough problem, that is why it has not been
>> commercially
>>>> successful (yet)
>>>>
>>>> H^) harry
>>>>
>>>>
>>>>
>>>>>
>>>>> ---- Original Message ----
>>>>> From: torpedo at demadrid.com
>>>>> To: synth-diy at vermine.org
>>>>> Subject: RE: [sdiy-interim] MIDI guitar, the hard way
>>>>> Date: Mon, 26 Mar 2007 08:10:55 -0700
>>>>>
>>>>>> So... Now for a crazy idea that hopefully I will be able to work
>> on
>>>>> whenever I finish the other 20 projects in the list:
>>>>>> I have this korean made Les Paul style guitar which I want to
>> become
>>>>> something useful. I thought about different artistic ways of
>> using it
>>>>> and finally I realized it was born to be a MIDI guitar controler,
>> but
>>>>> not the usual MIDI guitar with expensive Roland pitch to midi
>>>>> hardware. My thought was to connect every fret and every string
>> to an
>>>>> AVR/PIC microprocessor, creating a matrix of switches between
>> strings
>>>>> and frets. That by it self will make of my guitar a pretty cool
>> synth
>>>>> controler (I know, no string bending... oh well) however, I will
>> also
>>>>> like to be able to sense individual string strumming. I though
>> about
>>>>> it and the only solution I found is using an Hex pickup (magnetic
>> or
>>>>> piezo). Can you guys think of another solution for detecting
>>>>> individual string strumming? hopefully something DIY and cheap?
>> Once
>>>>> the guitar/controler is finished, it does not necesary have to
>> sound
>>>>> right when the strings are strummed.
>>>>>> Would something like this work (from Dave_B in the diystompboxes
>>>>> forum):
>>>>>> http://davebales.com/me/stompboxStuff/hex_pickup.jpg
>>>>>>
>>>>>> Notes from Dave_B:
>>>>>> "Could it look something like this?  I left out the wires and
>> guitar
>>>>> strings for clarity.  The white and gold part is the cut piezo,
>> the
>>>>> black part underneath is foam rubber or something similar.  I've
>> seen
>>>>> articles about glueing whole peizos to guitars for pickups (and
>> tried
>>>>> with some success a long time ago).  If you put these close to
>> the
>>>>> strings would it be enough to keep them from triggering notes
>> from
>>>>> adjacent strings?"
>>>>>> Have in mind that I am not expecting to capture sound out of the
>>>>> piezos, only the amplitude of the strumming.
>>>>>> Thanks,
>>>>>>
>>>>>> Gorka
>>>>>>
>>>>>> _____________________________________________________________
>>>>>> www.deMadrid.com , el correo gratuito de Madrid. 25 Mb de
>> espacio.
>>>>>>
>> ____________________________________________________________________
>>>>> _
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>>>>> y
>>>>
>>>>
>>>>
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>> diy
> 
> 
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