[sdiy] ring mod/asm-1 lfo

[gregory zifcak]

ah, that makes sense. is there some way i can remove the negative portion of 
the square?
thanks,
greg

>From: Scott Gravenhorst <music.maker at gte.net>
>Reply-To: music.maker at gte.net
>To: synth-diy at dropmix.xs4all.nl
>Subject: Re: [sdiy] ring mod/asm-1 lfo
>Date: Sun, 24 Oct 2004 19:33:44 -0700
>
>My guess is that it's a 4 quadrant multiplier.  You're square wave is 
>probably
>AC, meaning it spends some time above zero and then some time below zero
>(absolute value of the voltage would be the same).  So what's happening is 
>the
>ringmod is merely inverting your signal when the LFO is negative and not
>inverting when the LFO is positive.  You really should hear only the clicks 
>as
>the square wave changes states.  To get a tremelo effect, you'd want the
>negative half cycle to be, say, 0 volts instead of negative something.  It
>sounds to me like it's working perfectly.
>
>
>"gregory zifcak" <zifcak at hotmail.com> wrote:
> >hi,
> >i am building the roman sowa ring mod with asm-1 lfo (with a .1 uF cap) 
>as
> >the oscillator and it works great! except that in both ac and dc modes 
>the
> >triangle does tremolo, and the square doesn't. the square is definitely
> >working to my ears, but when it gets sub audio all i hear is the clicking 
>of
> >the edges and the other source comes through fine. my first suspects were
> >that i did the dc filter portion wrong, but the tri wave works sub audio.
> >any ideas?
> >
> >thanks in advance,
> >greg
> >
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