# Plex Transcode TrueHD with passthrough
**URL:** https://forums.plex.tv/t/plex-transcode-truehd-with-passthrough/733571
**Category:** General Discussions
**Tags:** server-mac
**Created:** [August 3, 2021, 2:33am UTC](https://forums.plex.tv/t/plex-transcode-truehd-with-passthrough/733571 "2021-08-03T02:33:24Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@eziggy3](https://forums.plex.tv/u/eziggy3)
#### Post date: [August 3, 2021, 2:33am UTC](https://forums.plex.tv/t/plex-transcode-truehd-with-passthrough/733571/1 "2021-08-03T02:33:24Z")
My Setup: Synology NAS running Plex server. LG G1 OLED with WebOS running Plex media player connected via eARC to a Denon AVR-X1600H.
The LG is set to passthrough. I read somewhere on this forum that Plex will automatically passthrough audio (I don’t see any passthrough settings anyway) so I am wondering why plex needs to transcode any TrueHD content, which it always does. Shouldn’t it go directly to the Denon? The Denon shows “Dolby Audio - DD+ +DSur” but the Plex dashboard shows “EAC3 Transcode”
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### Author:  [@BigWheel](https://forums.plex.tv/u/BigWheel)
#### Post date: [August 3, 2021, 3:22am UTC](https://forums.plex.tv/t/plex-transcode-truehd-with-passthrough/733571/2 "2021-08-03T03:22:56Z")
Just because a TV/device has a passthrough setting does not mean it can passthrough everything. Pretty sure the most it can passthrough it DD+ (dunno if this is your TV but TrueHD is not listed as a supported audio codec) [https://www.lg.com/us/tvs/lg-oled65g1pua-oled-4k-tv](https://www.lg.com/us/tvs/lg-oled65g1pua-oled-4k-tv)
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### Author:  [@FordGuy61](https://forums.plex.tv/u/FordGuy61)
#### Post date: [August 3, 2021, 3:28am UTC](https://forums.plex.tv/t/plex-transcode-truehd-with-passthrough/733571/3 "2021-08-03T03:28:50Z")
TV based apps cannot passthrough lossless audio such as TrueHD or dts-HD, even when using HDMI-eARC. It is a TV manufacturer restriction. No known TV supports passthrough of lossless audio from TV based apps.
TVs do support passthrough from devices attached to their HDMI inputs (Blu-ray player, streaming box, etc.). However, not all audio codecs are supported by all TVs. [RTINGS.com](https://www.rtings.com/) tests audio passthrough. You can check their review of your TV set to see which audio codecs it will pass via HDMI-eARC.
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### Author:  [@system](https://forums.plex.tv/u/system)
#### Post date: [November 1, 2021, 3:29am UTC](https://forums.plex.tv/t/plex-transcode-truehd-with-passthrough/733571/4 "2021-11-01T03:29:48Z")
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