[sdiy] Q: oscillator bank

[Scott Gravenhorst]

music.maker at gte.net wrote:
>Mike Hall <m3ha11 at rcn.com> wrote:
>>Just a general question about making an oscillator bank and
>>using only one exponential converter to drive the oscillators:
>>Is it possible?
>>My thoughts on this:
>>- sum the various control voltages: keyboard key, plus modulation, plus 
>>pitch-bend
>>- apply to the exponential converter
>>- use the converted Hz/V value to drive several oscillators
>>- each oscillator has octave switching via a resistive divider
>>- each oscillator (but one) has scaling to allow relative tuning +/- 
>>some interval
>>
>>How am I fooling myself that this could work?
>
>Yes, that can work.  Your scaling pots should be as a series resistance
>that feeds the summing not of the VI converter.

Sorry, "summing node".  Also, you'll want to convert the expo converter
output current into a buffered voltage output.

>
>>Any tips, suggestions, points to the obvious will be appreciated!
>>Thanks!
>>-- 
>>Mike Hall
>>users.rcn.com/m3ha11
>>
>
>---------------------------------------------------------
>- 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.