[pulseaudio-discuss] Why does the USB headset show the Digital Output (S/PDIF) port?

[zhaochengyi at uniontech.com]

Hi Tanu,

Thanks for your reply.

On 2022/6/28 下午5:18, Tanu Kaskinen wrote:
> On Tue, 2022-06-28 at 15:21 +0800, zhaochengyi at uniontech.com wrote:
>> Hi guys,
>>
>> I have a USB headset that the module is Edifier USB K800.
>> Plug it into the PC's usb port, and then I found "Digital Output
>> (S/PDIF)" audio port as below.
>>
>> Would you please tell me why the Digital Output (S/PDIF) port has been
>> shown, and how to verify if this USB headset really have the output
>> function of Digital Output (S/PDIF), and how to close this audio port.
>>
>> Thanks a lot!
> 
> Many USB sound cards show non-existent S/PDIF devices, probably because
> the default configuration in ALSA maps both analog and digital to
> device 0. 

I think even a digital device can't be regarded as an S/PDIF device,
so we can use the iecset(alsa-utils) tool to double check to verify
if the device is really an S/PDIF(iec958) device.

Thanks,
Chengyi