[sdiy] Buchla 291 Adaptation Sound Samples

[Scott Stites]

Hi Michael,

> _very_ nice! I think I'll put this on my list of things-to-do  ;-)
> The FM patches, how did theylook like?

Thanks!  It certainly is a different beast as filters go.

The FM patch was pretty basic - I just connected the sine wave from the
modulating VCO to the exponential input of the 'carrier' VCO, and ran the
output of the carrier VCO into the filter.  At various times I used the
square, sine and sawtooth wave of the carrier VCO.  Basically I just sat
down, set up a sound, recorded a bit of it, moved some controls (modulating
frequency, modulation level, carrier frequency, filter frequency and
bandwidth), and recorded a bit more, etc.  I'm actually using a shareware
recorder, which is why some of the samples cut out prematurely - I can only
record for a minute =0).

On the filter, I pretty much was controlling the center frequency with the
EG.  The plucking sound comes from the square wave LFO that I had connected
to the FM input of the filter.  I'd bring it up and down as the mood struck
me.  Occasionally, I would  modulate the bandwidth of the filter with a slow
triangle LFO.  The cool thing about the filter is that it has controls that
are either inverting or non-inverting.  I think I'm going to make as many as
my module controls like that as I can - it really leads to some cool effects
'on the fly' without having to patch in an inverter.

Really, in the patch, the filter was doing most of the work - it's like
falling off a log - there doesn't seem to be a setting on it that doesn't
sound cool as heck.

Take care,
Scott