200e

The phrase that includes"...pleasing FM tone," is a
red flag for me.
I understand what the author is attempting to state,
but by introducing that degree of subjectivity
immediately imposes a certain bias.


 --- Matt Carpenter <matfhew.carpenfer@gmail.com>
wrote:

> I don't know how many of you have read this or are
> aware of its
> existence but there's an entry for the 200e on
> Wikipedia. 
> http://en.wikipedia.org/wiki/200e
> A few shortcomings and work-arounds are mentioned
> which I'd like some
> updates or clarifications on, if possible. I just
> thought it would be
> worthwhile to get the latest data and to dispel any
> false notions that
> may be derived from that page.  
> 
> Here are the two I'm most interested in hearing more
> about and they
> concern the 261e:
> 
> 1) The bad news is that it is not obvious how to get
> similarly
> good-sounding results by routing the modulation
> oscillator output
> signal into the "fm in" signal input of the 261e (or
> the 259e for that
> matter). Instead of a pleasing FM tone, the sound
> gets really grainy
> as soon as the knob related to the "fm in" input is
> moved beyond its
> zero position. This is very unfortunate, because if
> this worked as
> expected, one could build some complex, but
> controlled, FM operators.
> I have found one work-around which suggests an error
> in design and/or
> implementation: by attenuating the modulation output
> (which can be
> accomplished by routing it through a 210e Control
> and Signal Router
> attenuating the connection a few clicks below
> unity), results are more
> in line with expectations. For now, absent any other
> information or
> known work-arounds, the best way to do conventional
> and controlled FM
> is to use the internal connections, which means that
> two-operator FM
> synthesis is the order of the day.
> 
> 2) Another source of confusion for me is why, when
> applying audio-rate
> frequency modulation to the principal oscillator,
> the pitch appears to
> go sharp or flat. I'd expect the pitch to remain
> stable and only the
> timbre to change.
> 
> Thanks!
> 
> 



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