1. No user installed addons are supported, python or otherwise.
2. No, they really are not supported.
3. They are not coming back
4. Read from 1. again

Any mention of illegal streaming sites, addons or any pirated material will not be tolerated. This is not democracy and any offenders will be banned and posts deleted immediately without warning.

Other than that, we hope you enjoy MrMC so far and we welcome any input and feedback you might have.

Team MrMC.

Audio proccessing on Apple tv 4k

Any issues that are tvOS specific
Post Reply
budtz80
Posts: 18
Joined: 10 Dec 2015, 09:36

Audio proccessing on Apple tv 4k

Post by budtz80 » 30 Dec 2017, 12:12

Is there any audio processing going on besides decoding for instance dts hd to pcm 7.1. Maybe becouse of Siri. There are lots of posts arround the web with people saying audio on Apple tv 4/4k is not good and recomend other devices if audio quality is top priority. I have a DD 5.1 file that is much lower volume on the Apple tv in mrmc vs my pc that is also decoding and sending pcm. But i also have lots of dts hd files that sound Identical.

Does mrmc do the decoding og is it tvos or both? Maybe mrmc decodes and sends it along and one can hope tvos just lets it pass trough or how does it work?

Volume on Netflix also seems a bit lov

User avatar
davilla
Team MrMC
Posts: 3538
Joined: 26 Oct 2015, 17:01

Re: Audio proccessing on Apple tv 4k

Post by davilla » 30 Dec 2017, 13:42

We don't do any intentional audio processing. If passthrough is enabled, DD 5.1 goes right to the audio receiver/amp for decode. The receiver/amp should indicate it is getting a DD 5.1 signal. Same for DTS 5.1.

Where things get complicated is for HD audio of 5.1 or 7.1 channels. I say HD audio as AC3 (DD 5.1) != EAC3 (DD+ 5.1). tvOS does not have an API to passthrough the encoded audio signals so we have to decode them internally to PCM, then send that out. Now if your PC is sending HD audio via passthrough, then your receiver/amp might be doing extra things to the HD audio after decoding.

All we do is properly decode HD audio and send it up as PCM.

budtz80
Posts: 18
Joined: 10 Dec 2015, 09:36

Re: Audio proccessing on Apple tv 4k

Post by budtz80 » 30 Dec 2017, 14:03

Thx for this.

Do we know what happens after mrmc sends audio up properbly decoded as pcm. Does it go to the receiver untuched or does the Apple tv tamper with it or process it in any way?

Hd audio. Do you mean dts hd and Dolby true as well?

Also. Is there any hardware related issues as to why Apple dont support bitstreaming?

My pc is decoding and sending pcm. So same as mrmc. Receiver is set to not alter the signal

User avatar
davilla
Team MrMC
Posts: 3538
Joined: 26 Oct 2015, 17:01

Re: Audio proccessing on Apple tv 4k

Post by davilla » 30 Dec 2017, 17:48

No sure but we do know that if ant setting in tvOS that modifies audio (such as reduce loud ...), then passthrough breaks. The only thing we can assume is that the PCM is untouched for HD Audio.

Yes.

No.

Then how it your PC doing the decode into PCM ? Who's decoder ?

budtz80
Posts: 18
Joined: 10 Dec 2015, 09:36

Re: Audio proccessing on Apple tv 4k

Post by budtz80 » 30 Dec 2017, 19:24

I use lav filters

Post Reply

Who is online

Users browsing this forum: No registered users and 4 guests