HDMI audio problem-no sound

[mimby]

Hi,
I have just got my first Raspberry Pi. I am relatively new to Linux and I am having trouble with the Raspberry Pi.
I cannot get the audio to work via hdmi on multiple hdmi TVs and have tried different walkthroughs/tutorials.
So far I have tried various methods in the config.txt file:

Setting "hdmi_drive" to 2.
Enabling force_hdmi_hotplug.
I have briefly tried changing "hdmi_group" and "hdmi_mode".
I also tried entering "amixer cset numid=3 2" into the terminal to force hdmi output.
Also changed the volume in the mixer.

So far none of this has enabled the audio, please could I have some help?
Many thanks.

[mimby]

Forgot to add that I am using Raspbian.

[paulie]

Does this help?

viewtopic.php?t=5062

[mimby]

Thanks for your suggestion paulie. I tried enabling these settings this from the thread:

hdmi_drive=2
hdmi_group=1
hdmi_force_edid_audio=1
hdmi_force_hotplug=1

CTRL+O to save
CTRL+X to exit

Still no luck, is there anything else I can do?
Thanks again.

[paulie]

Could you run the following command, and post the results?

Code: Select all

 tvservice -d edid.dat   

This should show what modes your TV can use.

[mimby]

Ran the command, here are the results:

Code: Select all

Enabling fuzzy format match...
Parsing edid.dat...
HDMI:EDID version 1.3, 1 extensions, screen size 115x65 cm
HDMI:EDID features - videodef 0x80 !standby !suspend !active off; colour encoding:RGB444|YCbCr422; sRGB is not default colourspace; preferred format is native; does not support GTF
HDMI:EDID found monitor range descriptor tag 0xfd
HDMI:EDID monitor range offsets: V min=0, V max=0, H min=0, H max=0
HDMI:EDID monitor range: vertical is 58-62 Hz, horizontal is 31-70 kHz, max pixel clock is 160 MHz
HDMI:EDID monitor range does not support GTF
HDMI:EDID found monitor name descriptor tag 0xfc
HDMI:EDID monitor name is LG_TV
HDMI:EDID found preferred DMT detail timing format: 1360x768p @ 60 Hz (39)
HDMI:EDID found CEA detail timing format: 1280x720p @ 60 Hz (4)
HDMI:EDID established timing I/II bytes are A1 08 00
HDMI:EDID found DMT format: code 4, 640x480p @ 60 Hz in established timing I/II
HDMI:EDID found DMT format: code 9, 800x600p @ 60 Hz in established timing I/II
HDMI:EDID found DMT format: code 16, 1024x768p @ 60 Hz in established timing I/II
HDMI:EDID standard timings block x 8: 0x81C0 6140 4540 3140 0101 0101 0101 0101 
HDMI:EDID found DMT format: code 85, 1280x720p @ 60 Hz (16:9) in standard timing 0
HDMI:EDID found DMT format: code 16, 1024x768p @ 60 Hz (4:3) in standard timing 1
HDMI:EDID found DMT format: code 9, 800x600p @ 60 Hz (4:3) in standard timing 2
HDMI:EDID found DMT format: code 4, 640x480p @ 60 Hz (4:3) in standard timing 3
HDMI:EDID parsing v3 CEA extension 0
HDMI:EDID monitor support - underscan IT formats:yes, basic audio:yes, yuv444:yes, yuv422:yes, #native DTD:1
HDMI:EDID found CEA detail timing format: 1920x1080i @ 60 Hz (5)
HDMI:EDID failed to find a matching detail format for 1280x720p hfp:64 hs:128 hbp:192 vfp:3 vs:5 vbp:4 pixel clock:74 MHz
HDMI:EDID calculated refresh rate is 61 Hz
HDMI:EDID guessing the format to be 1280x720p @60 Hz
HDMI:EDID found CEA detail timing format: 1280x720p @ 60 Hz (4)
HDMI:EDID found CEA detail timing format: 720x480p @ 60 Hz (2)
HDMI:EDID found CEA detail timing format: 1920x1080p @ 60 Hz (16)
HDMI:EDID found CEA detail timing format: 1920x1080i @ 50 Hz (20)
HDMI:EDID found CEA format: code 16, 1920x1080p @ 60Hz 
HDMI:EDID found CEA format: code 31, 1920x1080p @ 50Hz 
HDMI:EDID found CEA format: code 4, 1280x720p @ 60Hz (native)
HDMI:EDID found CEA format: code 19, 1280x720p @ 50Hz 
HDMI:EDID found CEA format: code 5, 1920x1080i @ 60Hz 
HDMI:EDID found CEA format: code 20, 1920x1080i @ 50Hz 
HDMI:EDID found CEA format: code 3, 720x480p @ 60Hz 
HDMI:EDID found CEA format: code 2, 720x480p @ 60Hz 
HDMI:EDID found CEA format: code 18, 720x576p @ 50Hz 
HDMI:EDID found CEA format: code 32, 1920x1080p @ 24Hz 
HDMI:EDID found CEA format: code 33, 1920x1080p @ 25Hz 
HDMI:EDID found CEA format: code 34, 1920x1080p @ 30Hz 
HDMI:EDID found CEA format: code 21, 1440x576i @ 50Hz 
HDMI:EDID found CEA format: code 1, 640x480p @ 60Hz 
HDMI:EDID found audio format 6 channels AC3, sample rate: 32|44|48 kHz, bitrate: 640 kbps
HDMI:EDID found audio format 2 channels PCM, sample rate: 32|44|48|96|192 kHz, sample size: 16|20|24 bits
HDMI:EDID found HDMI VSDB length 5
HDMI:EDID HDMI VSDB has physical address 1.0.0.0
HDMI:EDID HDMI VSDB has no extension fields
HDMI:EDID adding mandatory support for CEA (17) 720x576p @ 50Hz
HDMI:EDID filtering formats with pixel clock > 162 MHz or h. blanking > 1023
HDMI:EDID best score mode initialised to DMT (4) 640x480p @ 60 Hz with pixel clock 25 MHz (score 0)
HDMI:EDID best score mode is now CEA (1) 640x480p @ 60 Hz with pixel clock 25 MHz (score 43432)
HDMI:EDID best score mode is now CEA (2) 720x480p @ 60 Hz with pixel clock 27 MHz (score 3045736)
HDMI:EDID CEA mode (3) 720x480p @ 60 Hz with pixel clock 27 MHz has a score of 45736
HDMI:EDID best score mode is now CEA (4) 1280x720p @ 60 Hz with pixel clock 74 MHz (score 4607944)
HDMI:EDID DMT mode (4) 640x480p @ 60 Hz with pixel clock 25 MHz has a score of 61864
HDMI:EDID CEA mode (5) 1920x1080i @ 60 Hz with pixel clock 74 MHz has a score of 4149416
HDMI:EDID DMT mode (9) 800x600p @ 60 Hz with pixel clock 40 MHz has a score of 82600
HDMI:EDID CEA mode (16) 1920x1080p @ 60 Hz with pixel clock 148 MHz has a score of 2649416
HDMI:EDID DMT mode (16) 1024x768p @ 60 Hz with pixel clock 65 MHz has a score of 119370
HDMI:EDID CEA mode (17) 720x576p @ 50 Hz with pixel clock 27 MHz has a score of 45736
HDMI:EDID CEA mode (18) 720x576p @ 50 Hz with pixel clock 27 MHz has a score of 45736
HDMI:EDID CEA mode (19) 1280x720p @ 50 Hz with pixel clock 74 MHz has a score of 71080
HDMI:EDID CEA mode (20) 1920x1080i @ 50 Hz with pixel clock 74 MHz has a score of 2128680
HDMI:EDID CEA mode (21) 1440x576i @ 50 Hz with pixel clock 27 MHz has a score of 35368
HDMI:EDID CEA mode (31) 1920x1080p @ 50 Hz with pixel clock 148 MHz has a score of 128680
HDMI:EDID CEA mode (32) 1920x1080p @ 24 Hz with pixel clock 74 MHz has a score of 74766
HDMI:EDID CEA mode (33) 1920x1080p @ 25 Hz with pixel clock 74 MHz has a score of 76840
HDMI:EDID CEA mode (34) 1920x1080p @ 30 Hz with pixel clock 74 MHz has a score of 87208
HDMI:EDID best score mode is now DMT (39) 1360x768p @ 60 Hz with pixel clock 85 MHz (score 5188004)
HDMI:EDID DMT mode (85) 1280x720p @ 60 Hz with pixel clock 74 MHz has a score of 135592
HDMI:EDID preferred mode remained as DMT (39) 1360x768p @ 60 Hz with pixel clock 85 MHz
HDMI:EDID has HDMI support and audio support
edid_parser exited with code 0

Thanks again for your help.

[paulie]

According to info here

viewtopic.php?t=5851

"If the chosen format is a DMT format, the default driven mode will be DVI. The user will need to set driving mode to 2 explicitly if HDMI output is desired. In DVI mode there will be no sound!"

To get sound, you need a CEA (hdmi_group = 1) setting compatible with your monitor.

I have seen reference to mono sound files not playing well (too short?) But stereo files seen to work

[mimby]

Hi again, tried cea modes 4, 2, 31, 19, 5, 16, 20 and 34. However none of them gave sound. I tried some with hdmi_drive=2 with no change. I tried switching the sound card in alsamixer by pressing F6 with each mode, however this didn't help.
I also tried the headphone jack with and without this command: "disable_audio_dither=1" but the headphones buzzed/there was no sound.
Is there anything else I could do? Could it be anything to do with Raspbian being installed via noobs?
Many thanks.

[paulie]

It won't be noobs.
More info on audio problems...

http://raspberrypi.stackexchange.com/qu ... ot-working

[gkreidl]

Run

tvservice -a

What does it report?

[mimby]

Hi gkreidl, ran the command. Here are the results

PCM supported: Max channels: 2, Max samplerate: 192kHz, Max samplesize 24 bits.
AC3 supported: Max channels: 6, Max samplerate: 48kHz, Max rate 640 kb/s.

Thanks for the help both of you, its really appreciated.

[gkreidl]

Hi gkreidl, ran the command. Here are the results

PCM supported: Max channels: 2, Max samplerate: 192kHz, Max samplesize 24 bits.
AC3 supported: Max channels: 6, Max samplerate: 48kHz, Max rate 640 kb/s.

Thanks for the help both of you, its really appreciated.

Now try playing an audio or video file with omxplayer.

[mimby]

Tried playing a file in omxplayer. Didn't have one ready so I made a quick recording in sonic pi using this:

Code: Select all

2.times do
   play_pattern [40,25,45,25,25,50,50]
   play_pattern [40,25,45,25,25,50,50].reverse
end

Then used "omxplayer /home/pi/Desktop/my-recording.wav"
Still no sound. Tried changing the sound card in alsamixer to see if that did anything, no change.
Anything else that can be done?
Many thanks.
Edit: also tried beep1.ogg in the python_games file

[gkreidl]

Try

Code: Select all

omxplayer -o hdmi pathtofile

omxplayer output doesn't depend on Alsa settings.

[mimby]

Hi gkreidl,
Tried running "omxplayer -o hdmi /home/pi/python_games/beep1.ogg" and "omxplayer -o hdmi /home/pi/Desktop/my-recording.wav" but did not get any audio; what can be done?
Thanks again.

[gkreidl]

Does omxplayer report anything?
Try another HDMI cable.

[mimby]

Hi again,
Tried a second hdmi cable but with no luck.
This is what was reported by omxplayer:

Code: Select all

omxplayer -o hdmi /home/pi/Desktop/my-recording.wav
Audio codec pcm_s16le channels 2 samplerate 44100 bitspersample 16
Subtitle count: 0, state: off, index: 1, delay: 0
have a nice day ;)

Thanks again for your help.

[gkreidl]

have a nice day

usually means that omxplayer cannot play the file.
Can you test with some video with sound?

[mimby]

Hi again,
Tried playing the "what is a Raspberry Pi" video on the help page and a few YouTube videos. There was no sound on any of them.
What else can be done to solve this problem?
Many Thanks.

[gkreidl]

I'm out of any more ideas. If "tvservice -a" reports working hdmi audio and omxplayer has no sound I don't know, what may be causing it.

[mimby]

After trying suggested fixes with no luck, I decided to order a new sd card pre-loaded with NOOBS in case there was anything wrong with the sd card.
So far I haven't changed anything on the sd card-haven't made files or users; haven't changed settings or installed programs.

In Raspbian, if the sound doesn't work initially after I have tested, what are the normal steps I should take to get the audio working on a fresh install of the OS? Is there an order in which I should try different steps?
Any help is greatly appreciated, many thanks to the people who have given me help so far.