[sdiy] Additive Synthesis questions

[Paul Perry]

 That is an elegant low part number solution.
 but that's because all the difficulty is hidden in
 the gain cells.
 I was thinking of the totally discrete situation..
 
 And of course locking them all together with a master
 clock destroys the whole point of having a whole bunch 
 of them ;D
 
 paul perry Melbourne Australia
 
> ----- Original Message ----- 
> From: "Neil Johnson" 
>>> I can't think of a single SIMPLE sine wave generator,
>>> at least at audio frequencies. I suppose a phase shift oscillator
>>> would be about the best, but not easily voltage controlled.
>> Umm...
>> http://www.milton.arachsys.com/nj71/index.php? 
>> menu=2&submenu=0&subsubmenu=2
>> If you just want sin/cos then two gain cells and an inverter will get  
>> you there.
>> Now, getting a reasonably-sized (say, 32) bank of analogue  
>> oscillators to track each other with a good degree of accuracy over  
>> the full operating range and over full operating temperature will be  
>> tricky indeed.  OR get friendly with PLLs and lock everything to a  
>> single master that sets the overall pitch.
>