If doing it this way, then the process of "Update the chip firmware first, then cut the JP4 Jumper" will then also have to include "desolder the 470uF cap at C16 after updating the firmware". And save the cap if you ever want to do more firmware upgrades.

So my current setup of the Betz board is:

- JP4 cut after updating firmware.
- 470uF cap at C16 removed after updating firmware.
- IISC pad from Empeg goes to PCM_CLK on Betz+WT32i via a 4.7k/10k voltage divider.
- IISW pad from Empeg goes to PCM_SYNC on Betz+WT32i via a 4.7k/10k voltage divider.
- IISD1 pad from Empeg goes to PCM_IN on Betz+WT32i via a 4.7k/10k voltage divider.
- RX from controlling CPU goes to TX on Betz+WT32i.
- TX from controlling CPU goes to RX on Betz+WT32i via a 10k/10k voltage divider.
- 3.3v from controlling CPU goes to BATT on Betz+WT32i.
- 3.3v from controlling CPU goes to ENA on Betz+WT32i.
- 3.3v from controlling CPU goes to 3v3 aka VDD_IO on Betz+WT32i.
- 5v not connected on Betz board.
- Betz 2 pole slider switch set to the down/right/off position.