Step 5: Step 2: Creating the audio circuit.
- Insert the two 1k1 resistors (Brown, brown, red)
- Insert the two caps at C4 and C5.
- Insert the two electrolytic caps at C2 & C3.
Important! The two electrolytic caps must be inserted with proper orientation. The negative side of each cap should be facing away from the plus sign on the board silk screen. Follow the image below and you'll be fine.