waveshaping

[Martin Czech]

> > 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?
> 
Just any saw oscillator will do.  Depends on the type of tracking curve
you need. Linear or expo?  There are saw osc  in the formant, or in Korg
synthies, or in the Roland TB303, or at Tom G.'s site.  The schematics
are on the web somewhere. Music machines is a also good starting point. I
always print them out, and then delete these files. So I'm sorry I can't
send it to you.

A saw osc. has always a discharge switch, if there is no hard sync option
you just need to logical OR the sync signal to the usual comparator
signal, of course using a monoflop or RC highpass, otherwise the osc
will get not hard sync, but a hold option (this is also interesting).

m.c.