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  1. Python 2.7.16 (default, Apr  6 2019, 01:42:57)
  2. [GCC 8.2.0] on linux2
  3. Type "help", "copyright", "credits" or "license" for more information.
  4. >>> import pyaudio
  5. >>> p = pyaudio.PyAudio()
  6. Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924
  7. Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 924
  8. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.front.0:CARD=0'
  9. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  10. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  11. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM front
  12. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
  13. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
  14. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
  15. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround51.0:CARD=0'
  16. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  17. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  18. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround21
  19. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround51.0:CARD=0'
  20. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  21. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  22. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround21
  23. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround40.0:CARD=0'
  24. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  25. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  26. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround40
  27. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround51.0:CARD=0'
  28. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  29. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  30. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround41
  31. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround51.0:CARD=0'
  32. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  33. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  34. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround50
  35. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround51.0:CARD=0'
  36. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  37. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  38. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround51
  39. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.surround71.0:CARD=0'
  40. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  41. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  42. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM surround71
  43. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.iec958.0:CARD=0,AES0=4,AES1=130,AES2=0,AES3=2'
  44. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  45. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  46. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM iec958
  47. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.iec958.0:CARD=0,AES0=4,AES1=130,AES2=0,AES3=2'
  48. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  49. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  50. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM spdif
  51. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.iec958.0:CARD=0,AES0=4,AES1=130,AES2=0,AES3=2'
  52. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  53. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  54. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM spdif
  55. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi
  56. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.hdmi
  57. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem
  58. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.modem
  59. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline
  60. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.phoneline
  61. Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 934
  62. Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 934
  63. Expression 'alsa_snd_pcm_hw_params_set_period_size_near( pcm, hwParams, &alsaPeriodFrames, &dir )' failed in 'src/hostapi/alsa/pa_linux_alsa.c', line: 934
  64. ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
  65. ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
  66. ALSA lib pcm_a52.c:823:(_snd_pcm_a52_open) a52 is only for playback
  67. ALSA lib confmisc.c:1281:(snd_func_refer) Unable to find definition 'cards.bcm2835_alsa.pcm.iec958.0:CARD=0,AES0=6,AES1=130,AES2=0,AES3=2'
  68. ALSA lib conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
  69. ALSA lib conf.c:5047:(snd_config_expand) Evaluate error: No such file or directory
  70. ALSA lib pcm.c:2565:(snd_pcm_open_noupdate) Unknown PCM iec958:{AES0 0x6 AES1 0x82 AES2 0x0 AES3 0x2  CARD 0}
  71. ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
  72. ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
  73. >>> info = p.get_host_api_info_by_index(0)
  74. >>> numdevices = info.get('deviceCount')
  75. >>> for i in range(0, numdevices):
  76. ...         if (p.get_device_info_by_host_api_device_index(0, i).get('maxOutputChannels')) > 0:
  77. ...             print "Output Device id ", i, " - ", p.get_device_info_by_host_api_device_index(0, i).get('name')
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