Hi
Yes, the I2S port isn’t standard. It is not recommendation for common customer to use HDMI to USB Type C cable. If you want to DIY this kind of cable. You need to satisfy these condition below.
- The level of I2S in this I2S mode must be 3.3V;
- EXT_I2S_DECT needs to set high.
- Tone2 Pro should set I2S Audio by manual.