Android: How to configure “tinymix” to record syst

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.