neill's microbit play raw audio file - first draft

playsound.py

from microbit import display, sleep, button_a
import audio

def frames_from_file(sndfile, frame):
    while(sndfile.readinto(frame, 32) > 0):
        yield frame

def play_snd(fname):
    frame = audio.AudioFrame()
    with open(fname, 'rb') as sndfile:
        audio.play(frames_from_file(sndfile, frame),wait=False)
        sleep(1000)
        audio.stop()
    del frame

display.show('r')
while True:
    if button_a.is_pressed():
        play_snd('clip.raw')
    sleep(200)
    

Here's another one that triggers on receiving a radio message https://gist.github.com/nbogie/0731380a4b5be26cbed45133d59b38cc
I've also improved it to wait the correct amount of time before closing the audio.