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<DIV><FONT color=#0000ff size=2 face=Arial><SPAN class=594511417-26082016>I have
designed VCOs which are very popular in eurorack format, including the
Intellijel Dixie. This is a tricore VCO with an LFO range switch, and
many modular users use the Dixie primarily as an LFO to modulate other
devices. In this mode, I would guess that the sine wave output is used
about 90% of the time. The Dixie has a very good sine shaper circuit based
on a couple of transistors and an opamp which gives just about the cleanest sine
you can get without a self-oscillating filter, and this has been a huge selling
point for the Dixie. It is very important to have a clean sine wave source
for both amplitude (including ring) and frequency modulation. Clean
sine waves are also the best sound source for wavefolding.</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff size=2 face=Arial><SPAN
class=594511417-26082016></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff size=2 face=Arial><SPAN class=594511417-26082016>The
clean sine wave, and the Dixie's superior tracking, are probably the main
reasons why the Dixie has become the standard go-to VCO in
eurorack.</SPAN></FONT></DIV></BODY></HTML>