[sdiy] Guitar Synth boards ready... OT Question

[Scott Gravenhorst]

Harry Bissell Jr <harrybissell at prodigy.net> wrote:
>In my use... the Guitar must still be playable as
>a guitar. Scott's tuning suggestion, while a little
>different sounding... essentially still retains a
>true guitar sound.
>
>For my synthetic use... I could generate the missing
>fundamentals with octave dividers...and my "bass
>synth"
>by dividing down two octaves.
>
>There are several ways to get a "real" octave guitar
>sound... use the actual guitar string waveform and
>invert the polarity at the octave rate is one. OTOH
>the
>inversions will not necessarily be at the zero cross
>of the original waveform (there will be phase delay
>there).
>
>I don't think I could wait for PLLs in this case
>(since I'm already waiting for some time...)

One thing I've thought of (though I may not be the first) is
if you're generating a CV anyway, it may be possible to speed
up a PLL's response by adding your external CV to the error
CV provided by the PLL.  That way, the PLL needs only make
rather minor corrections.  I think this will work for a PLL
tracking a VCO, but maybe not useful for a CV generated from
a guitar string since there will be delay introduced by the
pitch to CV converter anyway.


>--- Scott Gravenhorst <music.maker at gte.net> wrote:
>> "john mahoney" <jmahoney at gate.net> wrote:
>> >> (private) BTW I tried your guitar synth tuning.
>> it was pretty interesting
>> >and
>> >> I'll probably
>> >> incorporate a means to do it when I go full poly.
>> >>
>> >> H^) harry
>> >
>> >
>> >Oh, yeah, I had 2 comment on the synth tuning that
>> Scott (Gravenhorst? I
>> >think) mentioned.
>> >
>> >First, I recall that one of the synth converters
>> supported the use of all E
>> >strings, primarily for the faster pitch conversion.
>> It also makes for a
>> >lighter action, which probably feels strange
>> beneath one's fingers!
>> 
>> Also, an all E string setup may work nicely for fast
>> response on a guitar
>> synth where only the synth is heard, but it would
>> suck greatly for using both
>> the synth and the standard pickups.  My tuning
>> corrects the speed for the
>> lowest two strings, which are the worst, but
>> maintains the ability to use the
>> standard pickups.  I don't find the delay
>> objectionable for strings 4,3,2,and
>> 1.  Also, for Harry's setup, he's using an analog
>> system to synthefy (if
>> that's a word) his guitar, as such, he needs to be
>> able to tune the guitar to
>> some sort of standard, either EADGBE or a chord or
>> whatever.  Without a bunch
>> of complicated PLL circuits for pitch shifting, I
>> don't see how all E strings
>> would work for him.  And some people really loathe
>> PLLs (I an NOT one of them...)
>> 
>> 
>> >Second, this is similar to a Nashville tuning
>> (a.k.a. high stringing), where
>> >the bottom 4 strings are tuned up an octave:
>> >http://www.guitartips.addr.com/tip164.html
>> >--
>> >john
>> >
>> 
>>
>---------------------------------------------------------
>> - Where merit is not rewarded, excellence fades.
>> - Hydrogen is pointless without solar.
>> - What good are laws that only lawyers understand?
>> - The media's credibility should always be
>> questioned.
>> - The only good terrorist is a dead terrorist.
>> - Governments do nothing well, save collect taxes.
>> 
>> -- Scott Gravenhorst | LegoManiac / Lego Trains /
>> RIS 1.5
>> -- Linux Rex         | RedWebMail by RedStarWare
>> -- FatMan: home1.gte.net/res0658s/FatMan/
>> -- NonFatMan: home1.gte.net/res0658s/electronics/
>> -- Autodidactic Master of Arcane and Hidden
>> Knowledge.
>> 
>> 
>

---------------------------------------------------------
- Where merit is not rewarded, excellence fades.
- Hydrogen is pointless without solar.
- What good are laws that only lawyers understand?
- The media's credibility should always be questioned.
- The only good terrorist is a dead terrorist.
- Governments do nothing well, save collect taxes.

-- Scott Gravenhorst | LegoManiac / Lego Trains / RIS 1.5
-- Linux Rex         | RedWebMail by RedStarWare
-- FatMan: home1.gte.net/res0658s/FatMan/
-- NonFatMan: home1.gte.net/res0658s/electronics/
-- Autodidactic Master of Arcane and Hidden Knowledge.