# first terminal with the first audio stream ------------------------------------------------------------------------ $ speaker-test -c2 speaker-test 1.0.16 Playback device is default Stream parameters are 48000Hz, S16_LE, 2 channels Using 16 octaves of pink noise ALSA lib pcm_direct.c:1479:(_snd_pcm_direct_get_slave_ipc_offset) Invalid type 'bluetooth' for slave PCM Playback open error: -22,Invalid argument ALSA lib pcm_direct.c:1479:(_snd_pcm_direct_get_slave_ipc_offset) Invalid type 'bluetooth' for slave PCM Playback open error: -22,Invalid argument ALSA lib pcm_direct.c:1479:(_snd_pcm_direct_get_slave_ipc_offset) Invalid type 'bluetooth' for slave PCM Playback open error: -22,Invalid argument ^C