if you use digi out from deck one, you would be sending a four channel mix to channels one and two of deck two.
Only if that's what you choose to send.
SPDIF output is a duplicate of whatever you route to the headphone out. Cycle through these choices by pressing the headphone level knob:
1) nothing
2) any individual channel in mono (1,2,3,4>L/R)
3) all 4 summed to mono (1+2+3+4>L/R)
4) 1>L / 2>R
5) 3>L / 4>R
6) 1+3>L / 2+4>R
(Don't push the knob while recording, if you do you'll immediately switch what is routed to the SPDIF out)
There is no way to set any r-44 clocks to external OR internal.
There is, but there is no menu switch. The R-44 automatically senses the clock rate of an incoming SPDIF stream. If that SPDIF stream does not match the clock rate the R-44 is set to in the record menu, the sampling rate indicator on the R-44 display will blink, indicating that the clock-sync is not locked.
The sampling rate indicator on the display will either be steadily illuminated, indicating one of these two conditions..
1) no SPDIF input, using the internal clock
- OR -
2) sync established to the SPDIF input (only possible when the R44 record/menu selection has been set to the same clock rate)
Or it will blink, indicating that it senses an external SPDIF stream but is not locked to it for whatever reason and is using the internal clock.