TLV320AIC3100: Microphone audio was not coming in the tlv320aic3100 codec

Hi Kumar,

You should open the mic control which's type is enum as below image, Then once you record any wav file, the ADC channel will be configured and powered up, Kindly share us the register dump if you find any issue during recording, we can quickly locate the soft issue through that.

Thanks

Kevin

Hi Kevin,

We have able to capture the audio but it is very noisy. Plese support us to resolve the issue.

Below the alsamixer configuration

root@picoimx8mm:/home/ubuntu# amixer -c 0
Simple mixer control 'Speaker',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Speaker Analog',0
Capabilities: pvolume pvolume-joined
Playback channels: Mono
Limits: Playback 0 - 127
Mono: Playback 116 [91%] [-5.50dB]
Simple mixer control 'Speaker Driver',0
Capabilities: pvolume pvolume-joined pswitch pswitch-joined
Playback channels: Mono
Limits: Playback 0 - 3
Mono: Playback 3 [100%] [24.00dB] [on]
Simple mixer control 'Mic PGA',0
Capabilities: cvolume cvolume-joined
Capture channels: Mono
Limits: Capture 0 - 119
Mono: Capture 93 [78%] [46.50dB]
Simple mixer control 'ADC',0
Capabilities: cvolume cvolume-joined cswitch cswitch-joined
Capture channels: Mono
Limits: Capture 0 - 64
Mono: Capture 59 [92%] [9.50dB] [on]
Simple mixer control 'ADC Fine',0
Capabilities: cvolume cvolume-joined
Capture channels: Mono
Limits: Capture 0 - 4
Mono: Capture 1 [25%] [0.10dB]
Simple mixer control 'DAC',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 175
Mono:
Front Left: Playback 157 [90%] [15.00dB]
Front Right: Playback 157 [90%] [15.00dB]
Simple mixer control 'DAC Left Input',0
Capabilities: enum
Items: 'Off' 'Left Data' 'Right Data' 'Mono'
Item0: 'Right Data'
Simple mixer control 'DAC Right Input',0
Capabilities: enum
Items: 'Off' 'Right Data' 'Left Data' 'Mono'
Item0: 'Right Data'
Simple mixer control 'HP Analog',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 127
Mono:
Front Left: Playback 86 [68%] [-20.50dB]
Front Right: Playback 86 [68%] [-20.50dB]
Simple mixer control 'HP Driver',0
Capabilities: pvolume pswitch
Playback channels: Front Left - Front Right
Limits: Playback 0 - 9
Mono:
Front Left: Playback 7 [78%] [7.00dB] [on]
Front Right: Playback 7 [78%] [7.00dB] [on]
Simple mixer control 'HP Left',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'HP Output Driver Power-On time',0
Capabilities: enum
Items: '0us' '15.3us' '153us' '1.53ms' '15.3ms' '76.2ms' '153ms' '304ms' '610ms' '1.22s' '3.04s' '6.1s'
Item0: '304ms'
Simple mixer control 'HP Output Driver Ramp-up step',0
Capabilities: enum
Items: '0ms' '0.98ms' '1.95ms' '3.9ms'
Item0: '3.9ms'
Simple mixer control 'HP Right',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'MIC1LM M-Terminal',0
Capabilities: enum
Items: 'Off' 'FFR 10 Ohm' 'FFR 20 Ohm' 'FFR 40 Ohm'
Item0: 'Off'
Simple mixer control 'MIC1LM P-Terminal',0
Capabilities: enum
Items: 'Off' 'FFR 10 Ohm' 'FFR 20 Ohm' 'FFR 40 Ohm'
Item0: 'Off'
Simple mixer control 'MIC1LP P-Terminal',0
Capabilities: enum
Items: 'Off' 'FFR 10 Ohm' 'FFR 20 Ohm' 'FFR 40 Ohm'
Item0: 'FFR 10 Ohm'
Simple mixer control 'MIC1RP P-Terminal',0
Capabilities: enum
Items: 'Off' 'FFR 10 Ohm' 'FFR 20 Ohm' 'FFR 40 Ohm'
Item0: 'Off'
Simple mixer control 'Output Left From Left DAC',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Output Left From MIC1LP',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Output Left From MIC1RP',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Output Right From MIC1RP',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [off]
Simple mixer control 'Output Right From Right DAC',0
Capabilities: pswitch pswitch-joined
Playback channels: Mono
Mono: Playback [on]
Simple mixer control 'Volume Soft Stepping',0
Capabilities: enum
Items: 'fast' 'slow' 'disabled'
Item0: 'disabled'
root@picoimx8mm:/home/ubuntu#

i2cdump registers:( After playing audio)

root@picoimx8mm:/home/ubuntu# ./i2cdump -f -y 1 0x18
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 00 00 01 66 03 21 07 14 90 00 00 08 02 00 80 80 ..?f?!???..??.??
10: 08 00 08 02 80 80 04 00 00 00 01 00 00 00 08 00 ?.?????...?...?.
20: 00 00 00 00 00 00 11 6a 00 00 00 00 00 00 00 00 ......?j........
30: 00 00 00 02 32 12 03 02 02 11 10 00 01 04 00 26 ...?2??????.??.&
40: 0c 1e 1e 00 6f 38 00 00 00 00 00 ee 10 d8 7e e3 ???.o8.....???~?
50: 00 00 30 23 00 00 00 00 7f 00 00 00 00 00 00 00 ..0#....?.......
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

Hi Kumar,

Firstly pls make sure the sample rate and clocks are same as playback, 

From the regdump, we can see both ADC and DAC are powered down, can you share some more information, like registers before and after arecord command, the logs during recording ?

Thanks

Kevin

Resolved the issue by doing powered down the DAC *& captured the audio. It was played as expected.

How can I powered on the ADC & DAC for doing the playback & capture?

Hi Kumar,

Using aplay or arecord .command for playback & capture, I believe the register setting is integrated in driver, just because you finish the recording, the device is powered down automatically, Can you capture the registers value when you was recording audio?

Thanks

Kevin

Hi,

We can able to record the audio and it working as expected but there is noise coming in the recorded file. 

Playing the audio. & attached file having some noise coming, We are suspecting the issue as the alsamixer Settings. Can you please help out the correct settings for recording the audio & don't have issue in playing the audio.

In the wav file, You can see every 3 or 5 secs, some noise was coming, It should not come. Can you please help us to resolve the issue by amixer settings or?

Note: Linux driver TLV320aic3100 did not handle the microphone/Speaker settings, we are doing by setting the amixer command only.

Below the register settings loaded the driver

No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ?...............
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 14 ...............?
20: 06 3e 00 44 00 80 07 7f 06 06 00 00 20 86 00 b2 ?>.D.?????.. ?.?
30: 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 @...............
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
root@picoimx8mm:/home/ubuntu#

Below the amixer command is used to record the audio from the headphone.

amixer -c 0 cset name='ADC Capture Switch' on
amixer -c 0 sset 'ADC' 40
amixer -c 0 sset 'Mic PGA' 50
amixer -c 0 sset "Output Left From MIC1LP" off
amixer -c 0 sset "Output Left From MIC1RP" off
amixer -c 0 sset "Output Right From MIC1RP" off
amixer -c 0 sset 'MIC1LM P-Terminal' 'FFR 10 Ohm'
amixer -c 0 sset "DAC" 0 off
amixer -c 0 sset 'Speaker Analog' 0 off
amixer -c 0 sset "HP Analog" 0 off
amixer -c 0 sset "HP Left" off
amixer -c 0 sset "HP Right" off
amixer -c 0 sset "HP Driver" off
amixer -c 0 sset "Output Left From Left DAC" off
amixer -c 0 sset "Output Right From Right DAC" off

After given the above amixer settings command, then below attacjhed registers

root@picoimx8mm:/home/ubuntu# ./i2cdump -f -y 1 0x18
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ?...............
10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 14 ...............?
20: 06 3e 00 00 7f 7f 7f 7f 02 02 00 00 20 86 00 b2 ?>..??????.. ?.?
30: 00 10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 .?..............
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
root@picoimx8mm:/home/ubuntu#

arecord -f S16_LE -c2 -r44100 -d20 aud_rec.wav
Recording WAVE 'aud_rec.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo

After recording the audio, the below register settings are

root@picoimx8mm:/home/ubuntu# ./i2cdump -f -y 1 0x18
No size specified (using byte-data access)
0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
00: 00 00 01 66 03 21 07 14 90 00 00 08 02 00 80 80 ..?f?!???..??.??
10: 08 00 08 02 80 80 04 00 00 00 01 00 00 00 08 00 ?.?????...?...?.
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
30: 00 00 00 02 32 12 03 02 02 11 10 00 01 04 00 14 ...?2??????.??.?
40: 0c 81 81 00 6f 38 00 00 00 00 00 ee 10 d8 7e e3 ???.o8.....???~?
50: 00 00 00 1c 00 00 00 00 7f 00 00 00 00 00 00 00 ...?....?.......
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
root@picoimx8mm:/home/ubuntu#

Regards,
SanthanaKumarS

Hi Kumar,

I will involve our codec AE Peter to comment the noise reason.

Thanks

Kevin

This sounds like hiss from your setup either this is a dynamic microphone you are using or some interference from monitors etc.

First try to record using audacity to compare if hiss is heard with the tool, second try with another microphone for example an ECM/condenser mic. 

The issue is resolved by adding changes in resistor from the microphone line because if we are connecting the external microphone, the microphone voltage was dropping. Anyway it fixes in hardware.