Component values for the resistors in the CV out circuit

[brightmind3]

Hello,

Both the schematic and board EAGLE files for the Arduino shield show a CV out circuit, consisting of one capacitor (C3), two resistors (R10 and R11) and an audio jack (X1). It is not described in the pdf, but you can see it build on page 59 of the same document.

I want to build the Arduino shield, but the resistor values for R10 and R11 are very confusing. R10 is marked 3.9k / 10k, and R11 is marked 0.1uF / 1k. Especially for R11, 0.1uF is a capacitor value, not a resistor value.

So:

• Is this circuit meant to be a low-pass filter?
• Should the component labeled as R11 be a resistor or a capacitor?
• What are the correct values for these two components?