ARP Axxe: Fast LFO Modification

It is useful to have the Axxe's LFO run at higher frequencies. As designed, it will only go up to about 25 Hertz. I like to make "growling" horn sounds using an LFO at about 80 Hz, so I added a SP3T mini toggle switch for "Fast LFO" modes.

When the switch is in the top position, a capacitor of the original 0.1 uF value is connected in the "C11" position to provide normal operation. With the switch in the middle position, a 0.01 uF capacitor is connected instead, making the LFO go 10 times as fast. Flipping it to the bottom position connects a 0.001 uF cap, making it go 10 times faster still. Great for FM effects. I highly recommend this mod.

Before

After

The LFO with the normal 0.1uF capacitor,
modulating the oscillator pitch, swept
from lowest to highest frequency: (56K mp3)

The LFO with the faster 0.01uF capacitor,
swept from lowest to highest frequency: (51K mp3)

The LFO with the even faster 0.001uF capacitor,
swept from lowest to highest frequency: (50K mp3)