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[zonka]

I'm using an Id Nuc attached via hdmi to my Marantz receiver.
Here are the questions:
1) under audio device should I choose hdmi dev=0 or front dev=0 ?
2) under volume should I choose system volume,  internal volume, or disable if I intend to use my receiver to control the volume?

[JimH]

I thought you said it was working with HDMI.  The HDMI choice is the correct one.

I would use Internal. 

[zonka]

It works with both. I just wasn't sure if there was a preference that would send a more pure signal to my receiver.
Thanks

[bob]

It works with both. I just wasn't sure if there was a preference that would send a more pure signal to my receiver.
Thanks

All of the device names are suggestions provided by alsa for each device.
In general, the
hdmi:
front:
and
hw:
ways of opening each device end up directly opening the device the same way.
plughw:
default:
pulse:
and
alsa:
add a mixer or other layer over the device access. For example, the pulse: device uses pulseaudio to share the device amongst multiple apps however that means that all of the apps have to use the same sample rate (which is 48k by default).