in Android it’s currently impossible to record system-audio with the Android-SDK.
Therefore I played around a bit with TinyALSA (since Android 4) and hope I can reroute the audio-out so I can record it.
When I call “tinymix” on my device I get following configuration:
ctl type num name value
0 ENUM 1 DL1 Equalizer Flat response
1 ENUM 1 DL2 Left Equalizer 450Hz High-pass
2 ENUM 1 DL2 Right Equalizer 450Hz High-pass
3 ENUM 1 Sidetone Equalizer Flat response
4 ENUM 1 AMIC Equalizer High-pass 0dB
5 ENUM 1 DMIC Equalizer High-pass 0dB
6 INT 1 DL1 Media Playback Volume 120
7 INT 1 DL1 Tones Playback Volume 0
8 INT 1 DL1 Voice Playback Volume 120
9 INT 1 DL1 Capture Playback Volume 0
10 INT 1 DL2 Media Playback Volume 120
11 INT 1 DL2 Tones Playback Volume 0
12 INT 1 DL2 Voice Playback Volume 120
13 INT 1 DL2 Capture Playback Volume 0
14 INT 1 VXREC Media Volume 0
15 INT 1 VXREC Tones Volume 0
16 INT 1 VXREC Voice DL Volume 0
17 INT 1 VXREC Voice UL Volume 0
18 INT 1 AUDUL Media Volume 0
19 INT 1 AUDUL Tones Volume 0
20 INT 1 AUDUL Voice UL Volume 120
21 INT 1 AUDUL Voice DL Volume 0
22 INT 1 SDT UL Volume 103
23 INT 1 SDT DL Volume 120
24 INT 2 DMIC1 UL Volume 120 120
25 INT 2 DMIC2 UL Volume 120 120
26 INT 2 DMIC3 UL Volume 120 120
27 INT 2 AMIC UL Volume 120 120
28 INT 2 BT UL Volume 120 120
29 BOOL 1 DL1 Mono Mixer Off
30 BOOL 1 DL2 Mono Mixer On
31 BOOL 1 AUDUL Mono Mixer Off
32 BOOL 1 DL1 MM_EXT Switch Off
33 BOOL 1 DL1 BT_VX Switch Off
34 BOOL 1 DL1 PDM Switch Off
35 BOOL 1 Sidetone Mixer Capture Off
36 BOOL 1 Sidetone Mixer Playback On
37 BOOL 1 Capture Mixer Tones Off
38 BOOL 1 Capture Mixer Voice Playback Off
39 BOOL 1 Capture Mixer Voice Capture Off
40 BOOL 1 Capture Mixer Media Playback Off
41 BOOL 1 Voice Capture Mixer Tones Playback Off
42 BOOL 1 Voice Capture Mixer Media Playback Off
43 BOOL 1 Voice Capture Mixer Capture Off
44 BOOL 1 DL2 Mixer Tones Off
45 BOOL 1 DL2 Mixer Voice Off
46 BOOL 1 DL2 Mixer Capture Off
47 BOOL 1 DL2 Mixer Multimedia On
48 BOOL 1 DL1 Mixer Tones Off
49 BOOL 1 DL1 Mixer Voice Off
50 BOOL 1 DL1 Mixer Capture Off
51 BOOL 1 DL1 Mixer Multimedia Off
52 ENUM 1 MUX_VX1 None
53 ENUM 1 MUX_VX0 None
54 ENUM 1 MUX_UL11 None
55 ENUM 1 MUX_UL10 None
56 ENUM 1 MUX_UL07 None
57 ENUM 1 MUX_UL06 None
58 ENUM 1 MUX_UL05 None
59 ENUM 1 MUX_UL04 None
60 ENUM 1 MUX_UL03 None
61 ENUM 1 MUX_UL02 None
62 ENUM 1 MUX_UL01 None
63 ENUM 1 MUX_UL00 None
64 INT 2 Capture Preamplifier Volume 1 1
65 INT 2 Capture Volume 4 4
66 INT 2 Aux FM Volume 3 3
67 INT 2 Headset Playback Volume 9 9
68 INT 2 Handsfree Playback Volume 27 27
69 INT 1 Earphone Playback Volume 11
70 ENUM 1 Headset Power Mode High-Performance
71 BOOL 1 Earphone Enable Switch Off
72 ENUM 1 HS Right Playback Off
73 ENUM 1 HS Left Playback Off
74 ENUM 1 HF Right Playback Off
75 ENUM 1 HF Left Playback Off
76 ENUM 1 Analog Right Capture Route Off
77 ENUM 1 Analog Left Capture Route Off
78 ENUM 1 TWL6040 Power Mode Low-Power
Does someone know which parameters I have to set so I can capture the playback (e.g. “multimedia”) with “tinycap”?
Sadly there’s no documentation available.
Kind regards,
Martin M.
Whether you can capture the playback data depends on what hardware you have.
It appears your device has a TWL6040 codec.
Have a look at this chip’s documentation to see how its mixer routing works; I’d guess you have to enable some “Capture Mixer”s, probably set some “MUX_UL”s, and maybe set the “Analog Capture Route”s.