S-Link Commands for my STR-DA90ESG Amp:

(some things are listed as untested which means they did not work for me)

Commands for device C0 (hex)
8+ bit Command
in hex
Function
06Mute On
07Mute Off
08Direct Sound On
09Direct Sound Off
14Volume Up
15Volume Down
2EPower On
2FPower Off
5000Source Select Tuner
5001Source Select Phono
5002Source Select CD
5003Source Select DAT/MD
5005Source Select Tape
5006Source Select Digital (untested)
5010Source Select Video 1
5011Source Select Video 2
5012Source Select Video 3
5013Source Select Video 4 (untested)
5015Source Select LD/DVD
5016Source Select TV/DBS

All Untested: Commands for device C3 (hex)
8+ bit Command
in hex
Function
04Sound Field On
05Sound Field Off
0AGenre (step)
0BEffect (step)
0FMode
10Rear Fade Up
11Rear Fade Down
12Center Fade Up
13Center Fade Down
5100Sound Field: Off
5101Sound Field: Cinema - Normal Surround
5102Sound Field: Cinema - Studio A
5103Sound Field: Cinema - Studio B
5104Sound Field: Cinema - Studio C
5105Sound Field: Cinema - Night Theater
5106Sound Field: Cinema - Mono Movie
5107Sound Field: Cinema - Sterio Movie
5108Sound Field: Virtual 3D - Multi Rear
5109Sound Field: Virtual 3D - Multi Dimesion
510ASound Field: Virtual 3D - Theater A
510BSound Field: Virtual 3D - Theater B
510CSound Field: Virtual 3D - Theater C
510DSound Field: Virtual 3D - Enhanced A
510ESound Field: Virtual 3D - Enhanced B
510FSound Field: Virtual 3D - Semi Multi Dimension
5110Sound Field: Virtual 3D - Semi Theater A
5111Sound Field: Virtual 3D - Semi Theater B
5112Sound Field: Virtual 3D - Semi Theater C
5113Sound Field: Music - Small Hall
5114Sound Field: Music - Large Hall
5115Sound Field: Music - Opera House
5116Sound Field: Music - Jazz Club
5117Sound Field: Music - Disco/Club
5118Sound Field: Music - Church
5119Sound Field: Music - Live House
511ASound Field: Music - Arena
511BSound Field: Music - Stadium
511CSound Field: Music - Game
511DSound Field: Auto Format Decoding

All Untested: Commands for device CB (hex)
70XXYYXX=EffectYY=Surround
00 Off00 Off