Dolby Trailers Download
Vinnie Frevert
Hi all, hope this is the correct thread for some help I have an Atmos capable soundbar with the Apple TV plugged into the input and then the soundbar going to the TV. However when I play a file with a DD+ Atmos track, such as the Dolby demo trailers my soundbar only shows PCM. Can anyone help? When I play something from the ATV+ app it shows at Atmos
Just as another test I have added these files to my MacBook library and played the via the computers app on Apple TV and I am also getting Atmos displayed using this method. Going to try using Emby tomorrow
For example, if the audio gets transcoded to Dolby Digital AC-3, it will always use a bitrate of 384 kb/s. This value cannot be changed, even though Dolby Digital AC-3 allows a maximum bitrate of 640 kb/s. Although 384 kb/s is a decent compromise between quality and data, it is very compressed and the quality is far from being transparent.
640kbps is fine for optical. This limitation is likely a solution for an issues with some specific ATV TVs (Sony/Philips) that had issues with 640kbps ac3 audio. I'm not sure if this is even an issue anymore though
I have confirmed this on my own set up many times. It supports both AC-3 640 kbps and DTS core 1509 kbps. I have never seen anyone claim otherwise until now.
That graphic is definitely incorrect. The person in that thread you linked to also confirms that DD 5.1 640 kbps works over S/PDIF:
Dolby Digital Plus soundtracks are easily converted to a 640 kbps Dolby Digital signal without decoding and reencoding, for output via S/PDIF. The 640 kbps bit rate, which is higher than the standard 448 kbps used on DVDs, is fully compatible with all existing Dolby Digital decoding products such as A/V receivers, and can provide higher-than-DVD quality from Dolby Digital Plus soundtracks when played back through existing systems.
You'll need to post a log from your device to show it isn't getting resampled. The server log won't prove anything. And there are multiple people on here that can't play that audio through optical. I've shown them how to resample to make it work.
S/PDIF isn't specific to optical, it's just the protocol. Example. mpv uses S/PDIF for all audio bitstreaming. In the log, the audio is always shown as S/PDIF stereo, but the audio details show it as 6 channel. We are talking about the physical entity of the fiber optic cable. It doesn't have the bandwidth, never has. Unless you can produce a log from the recipient end of the cable that shows 5.1 at 640Kb/s being decoded to raw audio, it isn't happening.
Yes I don't think anyone is arguing that toshlink or coax supports multichannel uncompressed LPCM, it doesn't. What is being asked is why compressed DD is being transcoded to 384Kbps when 640Kbps is supported.
I don't need trailers. I can make audio do whatever I want. Unfortunately, I don't have a 20ft optical cable, presently. I'll confess, I haven't actually tested this in a while. It might be interesting to acquire a long cable, and put it through its paces.
You are the sole person here claiming something that is very controversial and unsupported except for some graphic featured in a What HiFi article that isn't even discussed or mentioned again for the rest of the article. Numerous sources, including Dolby Laboratories themselves, confirm that 640 kbps is very much possible over the mentioned connection.
Now, instead of you proving your controversial statement, which would be common sense, I am offering to disprove it by confirming what has already been established as fact. To do that, I am asking your help in obtaining the device playback logs you are requesting, because I do not know how to retrieve them.
Unless you are able to prove otherwise, it is most definitely happening. It is an established fact. DVDs have been using DD 5.1 448 kbps bitrate audio for more than a decade and several streaming services, including Netflix and Amazon Prime, are sending DD 5.1 640 kbps audio to their clients. You would expect a ton more issues with 640 kbps DD 5.1 if it wasn't 100% supported as it is.
Trailer: On a smoky background, we see the wheels of a train fade into picture and the train starts to move. Once it's out of the picture, a gold Dolby Digital logo (the 1965-2007 Dolby logo with "D I G I T A L" below the logo) fades in and the smoky background fades out.
Music/Sounds: We start with a mysterious wind tune that fades with a high-pitched descending shriek of some sort (long version only). Following is some ringing sounds of bells, another wind tune (long version only), the metallic sounds of the train gears along with a train whistle and the rails clattering. An eerie synth drone/hum is heard throughout starting with the bells. "Sound design and mix by Academy Award Winner Randy Thom, Skywalker Sound" according to the Dolby Digital Demo Disc DVD Explore Our World.
Trailer: On a stormy city background, there are lightning flashes as we follow a helicopter. We move over the buildings to see a theater with a huge pylon with the Double-D symbol and neon letters spelling "DOLBY". The neon letters flash one by one as we go to ground level. The theater has a Dolby Digital logo which the words "NOW PLAYING" and "THE SOUND OF THE FUTURE" under it. We quickly zoom through the doors to a Dolby logo with a light shining across the top of it.
Music/Sounds: A thunderclap followed by a quick-paced drum solo ending with a cymbal hit, a helicopter and an ascending electric guitar strum that fades into a choir. Drum and cymbal hits and electrical sounds are heard as "DOLBY" is spelled out. A synth-like moan (or the helicopter) and 2 long, quiet flute notes with a sustained background string-section are heard during the zooming into the theater and finally a moaning sound and a descending piano tune. Mixed at Pacific Ocean Post Studios and Re-mixed by Terry Porter at Walt Disney Studios.
Trailer: We travel through a narrow canyon with steep walls either side. We pass an opening in the canyon where on top of a rock wall we see the Dolby Digital logo. An eagle's shadow is seen over the Dolby Digital logo. The canyon fades away, leaving the gold Dolby Digital logo which shines.
Music/Sounds: Rock falling sounds and a wolf howl are heard followed by a tribal desert theme. The famous sound sample of an eagle is heard as its shadow appears over the Dolby Digital logo. Sound Elements from Project One Audio; Mixed by David Parker at The Saul Zaentz Film Center.
Trailer: In a temple in Egypt, we see a light shine, and the camera moves to reveal that it's coming from a wall. In front of the light, we see the Dolby Digital logo in gold. The light shines bright twice as the camera zooms into the logo. When we finally get close enough to the logo, the light shines behind the logo very brightly, causing the logo to shine brightly, and the scene changes to a black screen with the logo, which shines.
Music/Sounds: We start with Egyptian percussion. Crickets, birds and a lion roar can be heard during the logo. We hear a rattlesnake-like sound before the we see the light. Then we hear Egyptian music with wood instruments; at the end are drums. Sound Elements from Project One Audio; Mixed by David Parker at The Saul Zaentz Film Center.
Trailer: A ton of code is seen on a scene of a military base with a helicopter exploding (Very reminiscent of the graphics of the PlayStation 2, the Xbox and the Nintendo GameCube). It changes to a racing scene with a car and a motorcycle. Another car crashes into it and then switches to a man (looking a lot like Duke Nukem) with the Dolby symbol on his suit on a spaceship walking away from an alien in which 5 sound speakers and a TV set zoom out and shards form the gold Dolby logo as the background fades to black.
Trailer: We start with bronze-ish colored water which appear to reflect the Double-D symbol; then we flash and see a splash of water with it drops hitting each other. It fades to rain falling toward us. We then see it hit water reflecting the Dolby Digital logo, then fade to the Dolby Digital logo, a 3-D object, in water. We fade to a smoky bronze background with "www.dolby.com".
Music/Sounds: Water gurgling and an ominous sounder cutting to a flash sound, some quite tings and ominous harp strokes, and an intense orchestra which becomes more whimsical and ends with a 5-note sounder along with some strange flourishing sounds. Mixed by Gary A. Rizzo at Skywalker Sound; Sound design and mixed by Marco D'Ambrosio at MarcoCo; music by San Francisco Ballet, Opera and Symphony.
Trailer: We see a starfield in space. Suddenly, lights appear from the left of the screen (which resemble the Northern Lights). The lights then move around into the Double-D symbol of Dolby. The Dolby Digital logo begins to zoom out from the top right of the screen, shining a bit before centering itself in front of a nebula formed from the lights ( la the 1990 Universal Pictures logo). The website URL "www.dolby.com" fades in below.
Music/Sounds: A brass piece which rises in sound and intensity as the lights begin to appear. As the logo zooms out, a choir is heard overlapping with the brass piece before reaching a crescendo. At the end, a five-note sounder is heard (the same one that was heard at the end of the "Rain" trailer). The score was performed by the Skywalker Symphony Orchestra. Sound designed by Macro D'Ambrosio at MarcoCo; Mixed in Dolby Digital by David Parker at The Saul Zaentz Film Center and in Dolby Digital Surround EX by Gary A. Rizzo at Skywalker Sound.
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