Compile error in Basics/HelloRadio.ino example

[mcl-uk]

I'm getting an "I2S_DAC_CHANNEL_LEFT_EN undefined" error when comiling this example sketch. I tried #defining this to 2 (found a reference to it in a legacy h file) and now the sketch compiles and runs seemingly correctly but I get no audio out from the CYD's spkr port. Has anyone found a way to get this example to work? Thanks for reading this far.