hello ernst,

here are some small examples for comparing
the a102 and rs500e.
the recording level was identical on all
examples to show the different output
characteristics of both filters.
also on all examples the cutoff was
modulated by the same triangle lfo.
the rs500e was switched to "24db" and
"fast cv" response.


1,
first you hear a sawtooth wave (a110) at the
filter input. no resonance.

http://www.selfoscillate.de/a100files/rs500e-nores.mp3 - 220 kb
http://www.selfoscillate.de/a100files/a102-nores.mp3 - 221 kb


2.
now only the filter at full resonance, no audio input.
the resonance sounds really different.

http://www.selfoscillate.de/a100files/rs500e-res-only.mp3 - 198 kb
http://www.selfoscillate.de/a100files/a102-res-only.mp3 - 195 kb


3.
finally a recording with the same sawtooth vco as in the
first example. the audio input knob was fully cw and
the resonance was set around the point where the filter
starts to oscillate.

http://www.selfoscillate.de/a100files/rs500e-spot.mp3 - 387 kb
http://www.selfoscillate.de/a100files/a102-spot.mp3 - 388 kb


as you can hear, the filters are far from sounding identical.


best wishes

ingo