MOTM

At 6:26 PM -0700 12/19/01, Scott Juskiw wrote:
>
>OK, so perhaps I need an "education" about how to use the 410 besides
>as a fixed filter bank. Anybody want to enlighten me as to other uses
>for the 410?

I'm surprised no one else has tried to answer this.  While I am sure there
are others on the list who could offer better answers, I'm willing to give
it a shot.

You can use the 410 as a fixed filter bank -- just turn the LFO depth down
to zero.  It's just that you can't control the three filters independently,
or get them to track well together.  You can also use it a single BPF by
using only one of its outputs,

The most obvious use for the 410 is a "phaser".  I tend to use slow LFO
rates with shallow depth, and faster LFO rates with increasing depth.  You
can go from one effect to the other with an 800 controlling both, or use
both of the 800 outputs to morph between an annoying noise and something
pretty.

The three separate outputs can be mixed at the board to create stereo
effects. This capability can be increased by sending these outputs through
phase inverters or short delays, or by modulating the RATE control with
another LFO, such as the 320.

By increasing DEPTH, setting the FREQ knobs farther apart, and MIX set all
the way wet, you can create "delay" effects with a constant or slowly
changing input -- as the sound appears then reappears.

Notice that SWEEP is normalled to a fixed voltage using a switched jack.
As such, it serves as a ganged control for the frequency of the three
filters.  When a plug is inserted, the SWEEP knob becomes an input
attenuator.

I frequently use the 410 for filter FM by patching an oscillator into
SWEEP.  By setting DEPTH to zero, and using an oscillator harmonically
related to the input, this becomes more melodically useful.  Even if it
isn't, you can sample it or run it through a pitch shifter.  Note that the
three individual outputs are still available to be mixed and processed
separately.  The internal LFO's can be used as well to add more stereo
animation or create long evolving patches.  You can also patch one or more
of the three outputs back into SWEEP, RATE, or DEPTH.

An interesting aspect is that the frequencies modulating the filters seem
inherently limited.  This dampening effect seems to reduce the incidence of
high frequency partials easily encountered with oscillator FM, even when
using feedback.

In using the 410, one thing to keep in mind is that it is very easy to set
frequency of the filters above the audible range.  Also, like most
"phasers"  it's not good at processing low frequencies, and in order to
make it a truer "clone" it has a HPF at its input.  I've thought about
bypassing that filter, but I've decided that I'm happy with it just the way
it is.