I would like to connect the BC127 to a DAC which requires a MCLK (in addition to the standard I2S signals) in the 8MHz-33MHz range. As I understand it the BC127 will act I2S master when an incomming A2DP stream is active. Will it then also output an MCLK ? If so on what pin ?
The BC127 won’t output a master clock, the module can act as I2S master (device responsible for producing bit clock and frame sync) but there isn’t a way to get the master clock from the BC127. A good bet would be to use a PLL to generate a master clock for the DAC using the bit clock and frame sync from the BC127.