Please have a look at project update 'From the lab: play 16 bit encoded audio'. Please let me know if this works.

To play back 16 bit files re-sampling works just fine. But when listening to a video stream or YouTube with 16 bit audio re-sampling apparently doesn’t work. See project comment ‘16 Bit issues ...’ So here’s a solution that works but isn’t perfect. The file mpd.conf in the etc directory needs to be changed. But...every time you change a setting in ‘PLAYBACK OPTIONS’ the chance is this MPD.config is replaced by one of Volumio and the modification you made is lost. Then you will have to add the line again. To test if it works first turn off ‘Audio Resampling’ in ‘PLAYBACK OPTIONS’. Make a SSH connection to the RPi with Volumio. In Windows you can use PuTTY. Go to the etc directory:cd /etc Open mpd.conf in a text editor:nano mpd.config (or sudo nano mpd.config) Add the following line (just before the line #replaygain “album”)audio_output_format “*:24:2” In nano the asterisk * is a command, you have to copy it from another text editor in Windows using copy/paste. Have a look at the screen dump I made of PuTTY. Restart Volumio and if everything went well you should be able to listen to 16 bit encoded audio.

We haven't tested this yet, but we assume it's possible. In principle every DMX box should have its own COM port, so it should work. We'll test this somewhere this week and report back.

Not a stupid question ;). We used 0805.

Are you sure that it's the level shifter? Did you check the data signal with an oscilloscope or logic analyser?