[sdiy] Top Octave Modular
Roman Sowa
modular at go2.pl
Mon Apr 3 12:48:28 CEST 2017
You don't need 832 controls for switches.
All you do is switch notes, that's 61 controls, and 8 (9?) buses,
preferably with VCAs not switches. There will be 96 signals to switch,
and they will be hardwired over note switches. And each note control
will switch all 8 buses at once with 1 control.
Roman
W dniu 2017-04-02 o 15:04, Elain Klopke pisze:
> So, more stupid questions.... In having 8 octaves of notes to switch to
> 8 busses, each with their own switch, that's 832 switches to control. At
> first I thought that daisy chaining 74HC595s would work, and it probably
> would, but there has to be a simpler way of controlling all those switches.
>
> CPLD, FPGA, Raspberry Pi?
>
> I'm getting pretty comfortable with the analog bits of the design
> (except maybe being a little fuzzy on how to turn the 0-5V output to
> something centered around 0V that other modules would be expecting), but
> the programming bits of this are still over my head.
>
> I am, however, learning so much from you guys!
>
> -Ian
>
> On Sun, Apr 2, 2017 at 4:58 AM, Elain Klopke <functionofform at gmail.com
> <mailto:functionofform at gmail.com>> wrote:
>
> Oh, ok, here's another question... Would it be better to have square
> wave outputs (what comes from the NoteDiv chips) or convert the
> square waves to saw waves between the NoteDiv chip and the switch
> matrix?
>
> -Ian
>
> On Sun, Apr 2, 2017 at 1:04 AM, Elain Klopke
> <functionofform at gmail.com <mailto:functionofform at gmail.com>> wrote:
>
> The Chord Organ does look like a good start. I'll poke and prod
> at things to see how it goes. Thanks guys!
>
> On Sat, Apr 1, 2017 at 4:58 PM, Quincas Moreira
> <quincas at gmail.com <mailto:quincas at gmail.com>> wrote:
>
> I was gonna say the same about the Chord Organ! I have one
> here, it will be the next Kit Review on my channel, up next
> week, which will coincide with Thonk having them back in stock.
> Easy way to do paraphonic organ-like polyphony :)
>
> Cheers
>
> On Sat, Apr 1, 2017 at 2:26 PM, Kylee Kennedy
> <kmkennedy at gmail.com <mailto:kmkennedy at gmail.com>> wrote:
>
> Sounds fun! You should try the Chord Organ firmware for
> Tom Whitwell's (Music Thing Modular) Radio Music for
> some more inspiration.
> Might be a good place to start to see how easy it works
> with arduino. This ones Teensy based.
> Cheers,
> Kylee
>
>
> On Saturday, April 1, 2017, Elain Klopke
> <functionofform at gmail.com
> <mailto:functionofform at gmail.com>> wrote:
>
> I think it could be done with an Arduino. It may
> need to be a Mega, but after seeing some of the LED
> matrix projects, some 74HC595s would work to control
> the switches, I'm sure.
>
> On Sat, Apr 1, 2017 at 2:35 PM, bill bigrig
> <billbigrig at yahoo.com> wrote:
>
> This would certainly be a intriguing project.
> Could it be done on an Arduino or 2? Or would
> one need to go to a higher system like raspberry?
> Rig.
>
>
> On Saturday, April 1, 2017 11:39 AM, Elain
> Klopke <functionofform at gmail.com> wrote:
>
>
> So this is another one of those instances where
> Ian/Elain has an idea that combines several
> branches from various thoughts bouncing around
> and kinda crashing together in a messy heap. I
> blame my tenure at Art School for this design
> process.
>
> I've always wanted a modular since I first
> stumbled upon this hobby. Lack of space, time,
> or money has always stopped me. I've also always
> wanted an organ. Mostly a lack of consent from
> the significant other and space has quashed that
> one.
>
> So here we go again. I have Tom Wiltshire's
> amazing little NoteDiv chips and things keep not
> panning out for the stand alone paraphonic synth.
>
> I keep thinking about how the Hammond and the
> string synths have discrete chunks that make up
> the whole thing. tone generator, filters,
> vibrato, chorus, etc. So why isn't there a top
> octave tone generator module yet?
>
> I think it would be interesting to have the 9
> different "drawbars" on separate outputs so each
> harmonic could be processed separately and a
> mixed output for the slightly more traditional
> sound. Throw in a MIDI input to simplify
> controlling the thing. Trigger and Gate outputs.
> Maybe something to even select the harmonics
> that get switched to the outputs (more fifths,
> higher/lower octaves). CV inputs to automate the
> "drawbars" that go to the mixed output. Some
> sort of randomizing option would be cool too.
>
> As always, thoughts and criticisms welcome.
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> --
> Quincas Moreira
> Test Pilot at VBrazil Modular
>
>
>
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