audiotestsrc num-buffers=%d freq={1:f} ! audio/x-raw,rate=48000 ! \
queue ! audioconvert ! vorbisenc quality=0.5 ! queue ! mux.
""" % (FONT_DESC, NUM_AUDIO_BUFFERS)
audiotestsrc num-buffers=%d freq={1:f} ! audio/x-raw,rate=48000 ! \
queue ! audioconvert ! vorbisenc quality=0.5 ! queue ! mux.
""" % (FONT_DESC, NUM_AUDIO_BUFFERS)