waveshaping

[Michael Potas]

 > Does your generator have some saw at all?
 No.  The generator just determines zero voltage crossings on the input to convert these to pulses. The pulses then feed a flip flop such that the output state changes once per positive pulse, dividing the frequency.  

      > guess your divided frequencys are based on sqares 50% duty cycle?
At the moment.  I am going to try adding PWM at some stage.

> If so you just need to add your 1x saw to your 1/2,1/4, 1/8 and so on square.
> try it on a piece of paper. The odd numbers are a bit more diffcult,
 > but I think there is a similar way.
OK.  I already have added a 1/4 octave generator, but have not yet had a chance to see what happens when they mix. Looks good on paper.  It might start getting a bit speaker damaging low if I take it much further though... 

> If you don't have a saw at all, well then you need a charge-run down network,
> basically this is a hard synced saw osc. Of course you get tracking problems etc.
> But this would only affect amplitude, which may be not harmfull for your > application.
>It is hard to notice 10% amplitude drop.
>Oskar Sala`s Trautonium uses hard synced saw oscillators (Thyratron tubes)
>for subharmonics.

I dont mind tracking problems - I think this will add to the interest!  Is there a schematic somewhere?