I have two Roku devices: Roku 3 & Roku Ultra. Both have version 9.4.0 builds 4200-04 and 4200-29 respectively. The volume on both devices is dramatically lower than it used to be and lower than other devices attached to the same television or amplifier. I am using the audio through the HDMI cable and have not made any changes to the audio settings in either Roku. Any help would be appreciated.