Record android system audio on i.MX6 sabre SD board

klldmofashi · ‎05-15-2014

Hi,

I want to record android system audio output on file. I saw this thread (Record android system audio) talking about this, but it's for i.MX53 and it's talking about alsa. I thought that Android is using tinyalsa, so does tinyalsa support looping the audio out to mic in as alsa do so that we can capture the system sound in such a simple way?

I searched around and someone said that by using tinymix, I should be able to get some clue. I got the information by the output of tinymix command, but currently I have no idea how to config it. Is there anyone here who has experience on it? Really appreciate it if you could give me some help.

This is the output of the tinymix commnand:

Number of controls: 105

ctl type num name value

0 BOOL 2 Input Mixer Switch On On

1 INT 1 MIXINL IN2L Volume 5

2 INT 1 MIXINL PGA Volume 0

3 INT 1 MIXINL IN3L Volume 5

4 INT 1 MIXINR IN2R Volume 5

5 INT 1 MIXINR PGA Volume 0

6 INT 1 MIXINR IN3R Volume 7

7 INT 2 Digital Capture Volume 108 96

8 INT 2 Capture Volume 63 63

9 BOOL 2 Capture Switch Off Off

10 BOOL 2 Capture ZC Switch On On

11 BOOL 1 Capture HPF Switch On

12 ENUM 1 Capture HPF Mode Hi-fi

13 INT 1 Capture HPF Cutoff 0

14 BOOL 1 Capture LHPF Switch Off

15 ENUM 1 Capture LHPF Mode LPF

16 INT 2 Sidetone Volume 0 0

17 INT 2 Digital Playback Volume 96 96

18 BOOL 1 DAC High Performance Switch Off

19 BOOL 1 ADC High Performance Switch On

20 INT 1 Beep Volume 0

21 INT 2 Headphone Volume 0 0

22 BOOL 2 Headphone Switch Off Off

23 BOOL 2 Headphone ZC Switch Off Off

24 INT 2 Headphone Aux Volume 7 7

25 BOOL 2 Headphone Mixer Switch Off Off

26 INT 1 HPMIXL IN4L Volume 7

27 INT 1 HPMIXL IN4R Volume 7

28 INT 1 HPMIXL MIXINL Volume 1

29 INT 1 HPMIXL MIXINR Volume 1

30 INT 1 HPMIXR IN4L Volume 7

31 INT 1 HPMIXR IN4R Volume 7

32 INT 1 HPMIXR MIXINL Volume 1

33 INT 1 HPMIXR MIXINR Volume 1

34 INT 1 Speaker Boost Volume 3

35 BOOL 1 EQ Switch Off

36 INT 2 EQ1 Volume 12 12

37 INT 2 EQ2 Volume 12 12

38 INT 2 EQ3 Volume 12 12

39 INT 2 EQ4 Volume 12 12

40 INT 2 EQ5 Volume 12 12

41 BOOL 1 VSS Switch Off

42 BOOL 1 HPF1 Switch Off

43 BOOL 1 HPF2 Switch Off

44 BOOL 1 HD Bass Switch Off

45 INT 2 Speaker Volume 0 0

46 BOOL 2 Speaker Switch Off Off

47 BOOL 2 Speaker ZC Switch Off Off

48 BOOL 2 Speaker Mixer Switch Off Off

49 INT 1 SPKOUTL Mixer IN4L Volume 7

50 INT 1 SPKOUTL Mixer IN4R Volume 7

51 INT 1 SPKOUTL Mixer MIXINL Volume 1

52 INT 1 SPKOUTL Mixer MIXINR Volume 1

53 INT 1 SPKOUTL Mixer DACL Volume 0

54 INT 1 SPKOUTL Mixer DACR Volume 0

55 INT 1 SPKOUTR Mixer IN4L Volume 7

56 INT 1 SPKOUTR Mixer IN4R Volume 7

57 INT 1 SPKOUTR Mixer MIXINL Volume 1

58 INT 1 SPKOUTR Mixer MIXINR Volume 1

59 INT 1 SPKOUTR Mixer DACL Volume 0

60 INT 1 SPKOUTR Mixer DACR Volume 0

61 ENUM 1 SPKOUTR PGA DAC

62 ENUM 1 SPKOUTL PGA DAC

63 BOOL 1 SPKOUTR Mixer DACL Switch Off

64 BOOL 1 SPKOUTR Mixer DACR Switch Off

65 BOOL 1 SPKOUTR Mixer MIXINL Switch Off

66 BOOL 1 SPKOUTR Mixer MIXINR Switch Off

67 BOOL 1 SPKOUTR Mixer IN4L Switch Off

68 BOOL 1 SPKOUTR Mixer IN4R Switch Off

69 BOOL 1 SPKOUTL Mixer DACL Switch Off

70 BOOL 1 SPKOUTL Mixer DACR Switch Off

71 BOOL 1 SPKOUTL Mixer MIXINL Switch Off

72 BOOL 1 SPKOUTL Mixer MIXINR Switch Off

73 BOOL 1 SPKOUTL Mixer IN4L Switch Off

74 BOOL 1 SPKOUTL Mixer IN4R Switch Off

75 ENUM 1 HPOUTR PGA DAC

76 ENUM 1 HPOUTL PGA DAC

77 BOOL 1 HPMIXR DACL Switch Off

78 BOOL 1 HPMIXR DACR Switch Off

79 BOOL 1 HPMIXR MIXINL Switch Off

80 BOOL 1 HPMIXR MIXINR Switch Off

81 BOOL 1 HPMIXR IN4L Switch Off

82 BOOL 1 HPMIXR IN4R Switch Off

83 BOOL 1 HPMIXL DACL Switch Off

84 BOOL 1 HPMIXL DACR Switch Off

85 BOOL 1 HPMIXL MIXINL Switch Off

86 BOOL 1 HPMIXL MIXINR Switch Off

87 BOOL 1 HPMIXL IN4L Switch Off

88 BOOL 1 HPMIXL IN4R Switch Off

89 ENUM 1 STR None

90 ENUM 1 STL None

91 BOOL 1 MIXINR IN2R Switch Off

92 BOOL 1 MIXINR IN3R Switch Off

93 BOOL 1 MIXINR PGA Switch On

94 BOOL 1 MIXINL IN2L Switch Off

95 BOOL 1 MIXINL IN3L Switch Off

96 BOOL 1 MIXINL PGA Switch On

97 BOOL 1 INPGAR IN1R Switch On

98 BOOL 1 INPGAR IN2R Switch Off

99 BOOL 1 INPGAR IN3R Switch Off

100 BOOL 1 INPGAR IN4R Switch Off

101 BOOL 1 INPGAL IN1L Switch On

102 BOOL 1 INPGAL IN2L Switch Off

103 BOOL 1 INPGAL IN3L Switch Off

104 BOOL 1 INPGAL IN4L Switch Off

Thanks,
Yao

Wlodek_D_ · ‎05-16-2014

Hello,

Thank you for your post, however please consider moving it to the right community place (e.g. i.MX Community ) to get it visible for active members.

For details please see general advice Where to post a Discussion? (https://community.freescale.com/docs/DOC-99909 )

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