Originally Posted by Oxyd722
My setup is now using Optical full time. But I didn't have a problem with an Apple TV or Plex on a Mac while using HDMI-ARC, like you do now. Could it be the Fire TV?
I'm having audio sync and volume level issues with my setup that I'm hoping you can help me with. A lot of the time (not all the time) the audio from my Vizio sound bar is a little bit behind the video of my display and the volume level from one channel to another is very different (i.e. ESPN outputs a lower volume than NBC, etc.). Here's my set-up:
Verizon Cable Box (Motorola 7232-P2) HDMI out --> Vizio M55-E0 HDMI 1 in --> Vizio M55-E0 Optical Out (using the cord provided by the display) --> Vizio SB3630-E6 sound bar optical in. I chose this setup because I set my cable box to pass through the native broadcast resolution (i.e. NBC 1080i, ESPN 720p) to the display rather than the cable box scaling the resolution to the default display resolution and sending it to the display for it to be scaled again to 4K. I'd rather have the TV take the native broadcast resolution and scale it to 4K (this way the video is scaled only once, not twice). For some reason if I take the HDMI cord from the cable box to the sound bar and an HDMI from the sound bar to the display the video resolution coming into the display is always 720p and not the native resolution of the broadcast, which I don't want. The only downside is that when the sound bar turns off automatically (with EcoMode turned on) and I turn on the cable box and the display I need to hit the Volume up/down button on my Verizon remote in order to "wake up" the sound bar. It won't turn on automatically with it connected via Optical like it would if I had it connected with the Arc HDMI. It's one extra click of the remote which i've gotten used to.
Here are my settings;
1. On the Verizon cable box I set the advanced HDMI audio out setting from "Auto" to "Pass through" (aka bitstream), set the Audio output from "Stereo" to "Surround" and set the dynamic range setting from "Heavy" to "None".
2. On the M55-E0 display I have the following Audio Settings selected:
-Volume Control Display: On
-Surround Sound: On
-Volume Leveling: On
-Lip Sync: 0
-Digital Audio Out: Bitstream
-Analog Auto Out: Fixed
3. On the Vizio Sound bar I have the following Audio Settings selected:
-EQ Mode: Movie
-Night Mode: Off
-AV Delay: 0 (none)
Note: The Sound Bar is successfully receiving a Dolby Digital signal because the white indicator LED lights up (at the bottom of the light display) for a few seconds and fades away. I can also confirm the audio format by looking at the system menu on the TV.
With this setup I'm assuming that the native broadcast audio format (i.e. mono, stereo, multi-channel DD) generated by the cable box is being passed from the cable box, through the TV and to the sound bar since I have the cable box set to pass through and the TV set to bitstream, correct? What I don't understand is how the settings at all three device levels interact which each other and affect the sound quality and volume. By setting the cable box and the TV to output a bitstream signal does that disable the rest of the settings on those devices? For example, on the cable box the "Dynamic Range" setting affects the loudness of the audio signal, but so does the "Volume Leveling" setting on the TV AND the "TruVol" setting on the sound bar. How should all these "volume" settings be set between all three devices? Also, the cable box and the TV both have "surround sound" settings. Should one, both or none of the devices have it on? I guess I'm just confused because there are duplicate settings between all three devices and I'm not sure how to set them all correctly so the play nicely together.