I already tried that. It just moves the frequency range more towards the
center of the knob rotation, but doesn't give much more range with the
control. A combination of greater series resistor to the pot (about 300K)
and decreasing control voltage divider resistor from 1K to 500 ohms seems to
give the best results, but now the pot controlled CV input doesn't have
enough range, so I'll probably have to decrease that series resistor input
there as well.
FYI, the straight CV input gives somewhere between a 5.5/7.7 to 1 ratio,
rather than the desire 2:1 (1V/oct). What's strange is that the pot
attenuated CV input has much less range. Loading effects, perhaps?
John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.com
The Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com
center of the knob rotation, but doesn't give much more range with the
control. A combination of greater series resistor to the pot (about 300K)
and decreasing control voltage divider resistor from 1K to 500 ohms seems to
give the best results, but now the pot controlled CV input doesn't have
enough range, so I'll probably have to decrease that series resistor input
there as well.
FYI, the straight CV input gives somewhere between a 5.5/7.7 to 1 ratio,
rather than the desire 2:1 (1V/oct). What's strange is that the pot
attenuated CV input has much less range. Loading effects, perhaps?
John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.com
The Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com
> -----Original Message-----
> From: sasami@... [mailto:sasami@...]
>
> Increase the resistor in series with the pot (220k to 470k). It sounds
> like
> you have a transistor with too much gain.
>
> Ken
>
>
> >Does anyone else have a Steiner VCF where knob values over 5 have no
> effect?
> >It seems that 0 through 4/5 covers the entire audio range on mine.
> >