AV Rant #285: With Tongue
It’s our 5 year anniversary (but we don’t mention that on the podcast). Hurray for us! Liz is back and this week we talk about the upcoming summer movies. Are you excited? We dissect the trailers for Spiderman, Dark Knight Rises, and Prometheus. Also, Mother’s Day is around the corner and we discuss the Audioholics gift guide and add a few of our own. Tom talks about his Sonomax eers Molded Earphone PSC-250 review (coming to Audioholics soon) and a bit more on the new Axiom speakers. Liz got her husband an Emotiva amp for his birthday. Now that is true love. After the break – some words on PCM from Clint. Oh, and here is that interview with Joss Whedon that everyone is talking about and that video of a lion trying to eat a child. Thanks for listening. Check out our new Facebook Page. To check our our YouTube channel where you can see the recordings of our show videos, click here. Download Tom’s FREE superhero-themed ebook Bob Moore: No Hero wherever ebooks are sold (or given away in this case). Visit Tom's website for download links as well as links for the two full-length followups - Bob Moore: Desperate Times and Bob Moore: Hostile Territory. Friend Tom and Liz on Google+ to join in on one of our hangouts.
Here was the question:
Let me know if I have this wrong, but it’s my understanding that BluRay player decoding has two features: BluRay decoding and audio mixing. Thus, if you are listening to secondary audio sources (like director’s commentary) it is literally mixed in on the fly, so the only place to do it is in the player. True?
And Clint’s response:
The typical question usually has to do with the button sounds and the issue of LPCM vs. native TrueHD. The deal was, BD was designed to mix everything and output LPCM from the get-go. It wasn’t really made to output native Dolby TrueHD, DTS HD, etc… Thus, on earlier players, when you finally COULD output TrueHD via HDMI – so that your receiver could decode it – you missed the layer of button sounds, etc… it never made it into the mix because you were outputting the Dolby TrueHD “pre” mix.
As far as I am aware, newer, more advanced players now actually re-encode to include the Dolby TrueHD source plus the button overlay sounds into a Dolby TrueHD output. It’s sort of bass-ackwards but that’s what people said they wanted.
You could say that misguided audiophiles actually changed the course of Blu-ray by insisting on having uncompressed Dolby TrueHD output via the HDMI jack – where it was really never intended to be. Apparently uncompressed PCM is for losers.