I having trouble getting a program I've written using the pygame sound mixer to play sound to work over Bluetooth. The program is able to work correctly over HDMI audio. The Raspberry Pi has no trouble connecting to the Bluetooth headphones, and
aplay works just fine to play sound. After I attempt to play sound with pygame,
aplay is broken and will not play sound until I do a reboot. Any ideas?
Here is my basic python test program:
import pygame.mixer pygame.mixer.init(48000, -16, 1, 1024) sndA = pygame.mixer.Sound("A.wav") soundChannel1A = pygame.mixer.Channel(1) soundChannel1A.play(sndA)
Running the program outputs the following:
$ python simplePyGame.py Traceback (most recent call last): File "simplePyGame.py", line 3, in <module> pygame.mixer.init(48000, -16, 1, 1024) pygame.error: Couldn't set hardware audio parameters: Success
aplay to play a WAV file outputs this error. It doesn't go away until the Raspberry Pi is restarted.
$ aplay ../20second_sine.wav Playing WAVE '../20second_sine.wav' : Signed 16 bit Little Endian, Rate 8000 Hz, Mono aplay: set_params:1363: Unable to install hw params: ACCESS: RW_INTERLEAVED FORMAT: S16_LE SUBFORMAT: STD SAMPLE_BITS: 16 FRAME_BITS: 16 CHANNELS: 1 RATE: 8000 PERIOD_TIME: (85333 85334) PERIOD_SIZE: (682 683) PERIOD_BYTES: (1364 1366) PERIODS: (5 7) BUFFER_TIME: 511875 BUFFER_SIZE: NONE BUFFER_BYTES: 8190 TICK_TIME: 0
Versions: - Raspbian Stretch (Linux 9) - Python 2.7.13 - aplay 1.1.3 - pygame 1.9.3 - bluealsa 1.2.0
Full information: https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=214901