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Audio Extraction (Digital and Analog)

C4 Fan

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My setup includes 4 TV locations (via HDBaseT) and several audio only locations.  All of my equipment is in a rack away from all zones.  For 3 of the TVs, I'm using ceiling or wall speakers powered by a C4 amp and for one location I have a Polk 5.1 passive soundbar powered by an Onkyo AVR.  I have 6 video inputs (DirecTV boxes, Rokus, etc.) feeding into an HDMI matrix.  In order to get sound to all of the locations I have to extract digital and analog audio from the sources.  I've tried a J-Tech converter https://www.amazon.com/dp/B08R6HCGVV?ref=ppx_yo2ov_dt_b_product_details&th=1 and it works for the most part but I would need 6 of these based upon my current setup.  Current setup is an input (Roku for example), into the J-Tech, into the HDMI matrix, out to the TV, digital out from TV into the Onkyo.  I'm just wondering if there is a better solution that would not require 6 converters.  My current setup works for the most part although the J-Tech devices do not work with certain Roku Ultra models (they do not pass 5.1 audio, just PCM).  That appears to be a defect with their device that they are looking into.  Anyway, I'm just looking for suggestions on best practices for extracting the audio.  Thank you for the help.

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