Basic operations for fixed point numbers

Type conversion

todo add a tail for these already sorted lists as we generally insert on the end

todo rename this - this is s16 to s16

todo rename this - this is s16 to s16

MIDI callbacks

todo rename this - this is s16 to s16

This fis the I2S callback function. It is called when the I2S subsystem needs more audio data. It is called at a fixed rate of 48kHz. The audio data i

irq handler for DMA

void audio_i2s_end(const audio_i2s_config_t *config) {

This task blinks the LEDs on GPIO 2-5