[pulseaudio-discuss] Buzzy noise on HDMI using passthrough

[Arun Raghavan]

On 2 June 2015 at 03:17, Thomas Martitz <kugel at rockbox.org> wrote:
> Am 14.05.2015 um 13:31 schrieb Arun Raghavan:
>>
>> On 12 May 2015 at 12:44, Thomas Martitz <kugel at rockbox.org> wrote:
>>>
>>> Hello,
>>>
>>> I've got a problem with new TV connected to a Zotac ZBOX with AMD APU via
>>> HDMI. When playing movies in Kodi using the pass through option I can
>>> hear
>>> only buzzy/white noise. The same setup worked fine on my previous TV.
>>> However, if I use ALSA, then kodi and audio passthrough works just fine
>>> (with either TV).
>>>
>>> Does anyone know what's wrong here? I first thought the TV is broken, but
>>> then how can it work with alsa?
>>>
>>> I attached the output of pactl list and aplay -L. If I can provide more
>>> information just tell me. Pulseaudio version is 6 from debian sid.
>>>
>>> PS: I did select the "Digital Stereo (HDMI) Output" card profile because
>>> I
>>> know passthrough does not work in multichannel configurations.
>>
>> White noise probably means that what's being sent out is not valid
>> data, and is being interpreted as PCM. The logs you sent suggest
>> nothing wrong.
>>
>> Does this work for you (you can get an AC3 file here -
>> http://samples.mplayerhq.hu/A-codecs/AC3):
>>
>>    gst-launch-1.0 filesrc location=/a/file/with/ac3 ! ac3parse ! pulsesink
>>
>> Cheers,
>> Arun
>
>
> Unfortunately this also gives buzzy noise. Is there anything else I can
> debug?

Could you post the output of alsa-info while this is running?

-- Arun