Sorry for the confusion.
To clarify, the Ultra 4660X is the only Roku we have set up. I haven't set up the Roku Express 4K. I bought that just to get the rev 1 Voice Remote Pro.
Both the original Gaming Remote that came with the Ultra (model RC193) and retail rev 1 Voice Remote Pro (model RC917, SKU RCS01R) control the Samsung TV power, and the attached Samsung HW-M550 soundbar power and volume, without any problem. The Samsung soundbar is connected to the TV via optical (TOSLINK) cable, not CEC.
The original Gaming Remote and retail rev 1 Voice Remote Pro are configured to use IR, not CEC.
I tried a lot of different things, but was not able to get the VRP model RC795 to control the soundbar volume, details below.
I re-entered "Set up remote for TV control" for the original Gaming Remote RC193, just to see if there is a difference in the codes between the RC193 and RC795. The Gaming Remote RC193 iterated 19 codes, and found the correct codes to control my Samsung TV and soundbar at code 19. So, there is a difference in codes between the RC193 and RC795.
VRP model RC795 iterates only 8 codes and fails to find the codes for the Samsung HW-M550/ZA Soundbar.
To recap:
- I only have 1 Roku set up - Roku Ultra 4660X. I don't intend to set up the Express 4K. I bought it just to get the rev 1 Voice Remote Pro.
- The Ultra's original Gaming Remote RC193 and Dec 2023 rev 1 Voice Remote Pro RC917 are able to control power and volume on both my Samsung UN65H7150AF TV and Samsung HW-M550/ZA Soundbar.
- I can pair the RC795 with the Ultra 4660X
- If I disable TV audio out to the soundbar and turn off the soundbar, Roku's "Set up remote for TV control" function is able to find the code to control my Samsung UN65H7150AF TV power and volume. However, this code does not allow the VRP model RC795 control my Samsung HW-M550/ZA Soundbar power or volume.
- With the soundbar enabled, the "Set up remote for TV control" function is not able to find the codes to control my soundbar, for the VRP model RC795
- Even manually selecting each of the 8 available codes for the VRP model RC795, none of them control my Samsung HW-M550/ZA Soundbar.
Things I tried. None of these worked:
- cycling power on the Ultra, i.e., unplugging for more than 10s, then plugging back in.
- rebooting the RC795, i.e., pressing and holding the pairing button from 20s.
- attempting to set up the RC795 to control TV via "add a device", not "add a remote". It walked me through the same process, i.e., iterate 8 codes, with the same result.
- find my remote from Ultra's settings, as per user Reaton1984 in this post. Not able to control the soundbar.
- With soundbar disabled, and TV using its internal speaker, I entered Roku remote TV control setup for the RC795. It muted the internal TV speakers with code 5. VRP model RC795 is able to control TV power and internal TV speaker volume with this code. However, when the soundbar is re-enabled and turned on, VRP model RC795 is not able to control the soundbar power or volume.
- With soundbar enabled, I entered Roku remote TV control setup for the RC795 and "manually" selected each of the 8 codes one at a time. That is, from "Set up remote for TV control", I chose a code even though I could still hear the music. Each time, I re-enabled the soundbar, to no avail. VRP model RC795 is not able to control the soundbar.
My setup details:
Roku Ultra 2018
model 4660X
software 13.1.4, build 1512-46
Gaming Remote
firmware 2.01.19.108
model RC193
This is the original Gaming Remote that came with the Ultra 4660X and controls the TV and soundbar.
Voice Remote Pro (rev 1, retail)
firmware rtn.4246
model RC917
SKU RCS01R
This is the retail VRP that controls TV and soundbar, purchased Dec 2023
Voice Remote Pro (rev 1, from Roku Express 4K)
firmware rtn.4246
model RC795
This is the "new" VRP that came with the Express 4K. It does not send codes to control the soundbar.
2014 Samsung UN65H7150AF TV
2017 Samsung HW-M550/ZA Soundbar, connected to TV via optical audio (TOSLINK) cable