[sdiy] Last question about LFOs

[David G. Dixon]

Well, my custom-designed shape-shifting triple LFO works perfectly, and the
LEDs are happily blinking away.  However, I'm not sure about the capacitor
values I chose.  I selected 10 uF (non-polar) for the "long" cap and 33 nF
for the "short" cap.  This way, the long durations range from about 4
minutes to just less than 1 second, and the short durations range from a few
seconds to about 2.8 ms (360 Hz).  I wanted a small amount of time overlap
between the two settings, and I achieved that.  However, there isn't much
useful "low frequency" range in the "short" setting, as the thing becomes an
oscillator less than halfway along the rotation of the rate pot.  I'm
thinking I might want to swap out that 33 nF cap for 100 nF or maybe even
330 nF.

Hence, my question: Is there a "standard" or "accepted" range of frequencies
for LFOs, and barring that, what is the typical maximum frequency of LFOs?