Re: [alsa-devel] [PATCH] Re: iec958 switch uneffective while playing ac3 stream

Takashi Iwai tiwai@suse.de writes:

I don't care much about wording, so I'd like to ask you guys which one is better. In general, we have the following modes for SPDIF output:

1. "Exclusive" / "Independent" mode

You'll have a dedicated SPDIF stream, suitable for AC3/DTS output.

2. "Duplicate" / "Shared" mode

The normal analog output is copied to SPDIF output.

3. (codec-dependent) "Analog Loopback" mode

The analog line-in / CD / mic-in (and mixer) is loopbacked to SPDIF output

4. (codec-dependent) "SPDIF Loopback" mode

The SPDIF-input is loopbacked to SPDIF output

Since we can have more that one word in the label, we can have a more consistent set :

1. "SPDIF-out only" 2. "Analog-out copy" 3. "Analog-in loopback" 4. "SPDIF-in loopback"

HTH