Pinout Analog In-/Output E-MU 0404

I've determined the pinout via measuring the transition:

(View from the front side - not solder side!)

(View from the front side - not solder side!)

Pin
Signal
1
-
2
OUT-R Signal
3
OUT-L Signal
4
IN-L Signal
5
IN-R Signal
6
OUT-R Ground
7
OUT-L Ground
8
IN-L Ground
9
IN-R Ground




Background

The breakout cable for analog in-/output of the E-MU 0404 is terminated on soundcard side with a regular male SUB-D 9 pin connector:



To overcome the limitations of additional 6.3mm mono -> RCA-adaptors, one could use a
decent 9 pin (male) SUB-D plug and solder his RCA-IC or RCA-adaptor directly to it: