Hi and thanks for the reply.

The remotes on site for the soundbar job are a couple of Marantz RC9200 and a Marantz RC5400 that I supplied and installed a decade ago. The room with the 4K sony TV and soundbar uses one of the 9200's.

Learning codes from the Sony HT-ST9 and then decoding them gives me the following:

[Cursor Up] Sony15, device = 176, obc = 120

0000 0067 0050 0000 0060 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0018 0018 0030 032f 0060 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0018 0018 0030 032f 0060 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0018 0018 0030 032f 0060 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0018 0018 0030 032f 0060 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0018 0018 0030 0018

[Display] Sony15, device = 48, obc = 75

0000 0067 0040 0000 0060 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0018 0018 0018 0347 0060 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0018 0018 0018 0347 0060 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0018 0018 0018 0347 0060 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0030 0018 0018 0018 0018 0018

[Clear Audio+] Sony20, device = 16, subdevice = 104, obc = 47

0000 0067 0069 0000 0060 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0030 0018 0030 0018 0018 0212 0060 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0030 0018 0030 0018 0018 0212 0060 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0030 0018 0030 0018 0018 0212 0060 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0030 0018 0030 0018 0018 0212 0060 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0030 0018 0030 0018 0018 0018


Having a look at the receiver discretes from the RC Discrete Libraries I see:
 Notes: Tested on STR-DA5400ES.

and that decodes as protocol = Sony20, device = 16, subdevice = 40, obc = 62

HDMI A (AV1 (Older/Alternate)):
0000 0067 0000 0015 0060 0018 0018 0018 0030 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0253
Notes: Tested on STR-DA5400ES.

and that decodes as protocol = Sony20, device = 16, subdevice = 32, obc = 62

It tried both the above when I was there on site programming and got no response from the soundbar.

Obviously while the protocol and device match for one of the codes sets learned from the soundbar's remote, the subdevices are different and clearly the lengths of the hex strings are different too which is why I meantioned the duration issue in the OP.

When learning from the remote on site each learned code was tested back using Touch Screen Setup's 'test' feature. The long duration codes all worked. These were captured using a short press of the donor remote's buttons. Long presses during learning resulted in shorter codes roughly equivalent in length to those from the discrete library; however the soundbar didn't respond when those were tested.


I had tried the standard Sony discrete codes for TVs but again without success. However, I have since searched RC and got some others to try that were posted in discussion threads. I will try those when next on site.

All code learning was done head to head approx 2-3" gap and under blackout cloth. Code testing was done with the Marantz RC9200 connected to the laptop via am FTDI USB to Serial converter and running on Windows XP on a laptop that I keep for supporting older remotes. Site conditions: LED GU10 lighting.