The plan was to get/use a Broadlink RM4 pro to control various IR/RF devices.
This works fine for multiple IR devices but I struggled with 1 RF remote. (from a Bose system)
What I didn’t know was that the frequency for this remote is 27Mhz so after trying/searching I found out it’s a frequency thing.
Anyone who has found a solution to control this system from HA?
Breaker one nine! Who in the 21st century is still using American CB band for remote control? 
The ionosphere skip and a handful of loudmouths running 10,000 watt base stations make that band useless for even communication between truckers at many times. RC model airplanes in the 1960’s and 1970’s used to use one CB channel for remote control, but even that migrated to 49 MHz as soon as the FCC and available RC hardware permitted it…
Maybe people outside America? Is there some kind of point you’re trying to make which even remotely helps the OP?
Maybe people outside America? Is there some kind of point you’re trying to make which even remotely helps the OP?
Is there some kind of point YOU’RE trying to make that remotely helps OP?
Show us on the doll where America hurt you.
Apparently 27Mhz is used by Bose audio systems and let’s not debate on that please.
Here’s an old github ESP8266 project with reverse-engineering details on the Bose 27.145 MHz remote protocol, if you want to attempt to create an integration: