AppleTV Dac really 16bit@44.1khz sampling rate?

I was thinking about getting an AppleTV, but now have concerns with the 16bit@44khz dac. Most HD content needs 24bit@96khz, so this would suggest everything you buy on the Apple Store is down converted. What do you audio experts think about the sound quality of these things?

Also noticed that audio from a flash based ipod sounds better than a hard drive based ipod, so that leads to questions about noise and jitter on hard drive based AppleTV's. Any noise and jitter comments?

1 G4 Xserve w/HW RAID, 17" + 15" G4 PB, 2 G4 Mini's, Mac OS X (10.4.10), AppleCare, ProCare, Don't leave home with out it.

Posted on Dec 17, 2008 11:20 AM

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28 replies

Jan 16, 2009 9:56 AM in response to Winston Churchill

The AppleTV is not a high end product


I've been thinking about this comment of yours for a few weeks now, and I am beginning to agree. At this point, I wouldn't even call it a mid-range product. After you awakened me out of my AppleTV daze, I realized that the AppleTV's main purpose is to facilitate the purchase of content from the iTunes store.

I'm now starting to look at other media players such as the new one from Netgear ( http://netgear.com/Products/Entertainment/DigitalMediaPlayers/EVA9150.aspx?detai l=Specifications) or one of the Linux media centers. Now that I've looked elsewhere, you are correct, the AppleTV does not look like quality anymore. Lack of 96/24 audio output, difficult to engage power-saving ability, poor video output capability, harshly limited disk space, etc.

Thanks for opening my eyes.

Dec 21, 2008 5:24 PM in response to Winston Churchill

"Oh and let's not forget there is no audio available in these formats. "

Very startling statement. Lets proceed with caution and ask questions if necessary.

Much DVD content is at 24bit@96hz, which goes to the point of the issue concerning expectations regarding down converting to 16bit@44.1khz .

My expectations are that content purchased through the %$# store be as high of a resolution as content delivered by my SAT or Cable company.

Like I said, the hardware is in place, hopefully, the software will catch up.

Dec 21, 2008 5:42 PM in response to Winston Churchill

96 x 24 x 6 is 13.8 Mbps, so you are either heavily compressing your audio or limiting yourself to 2 channels which are not always available.


Why wouldn't stereo recordings of music not have two channels available?


You cannot legally copy this content, so apart from almost non existent unprotected sources, there is no content available in these formats



What is the difference between ripping a CD, which you say is legal, and ripping this DVD-A? http://www.amazon.com/Love-Beatles/dp/B000JK8OYU



In fact if we had your audio at 4 Mbps we really wouldn't get much video at all.


Why would I want video with the audio? When I play the songs I rip from CD, all I get on the TV screen is the cover art and some text.


Firstly there would be the cost of licensing (which they wouldn't likely get anyway, more likely the cost of a court case). Secondly 96/24 might work in limited formats, but (ignoring the legality for a moment) 96/24 doesn't come in these limited formats and to avoid half a solution the AppleTV would need to be much more powerful than it is now.


What licensing cost? What court case? What do you mean by "96/24 doesn't come in these limited formats"?

Are we even talking about the same thing?

Dec 21, 2008 6:42 PM in response to camper

Why wouldn't stereo recordings of music not have two channels available?


Not all DVD-A and SACD discs have stereo channels, some only have stereo, some have both 6 and 2 channel audio, some are compressed some are not. You can't have a system that only supports some of what you might find and won't work with some discs. Yes the hardware may stand up to 96/24 PCM, but if you don't have that then it gets messy.

What is the difference between ripping a CD, which you say is legal, and ripping this DVD-A? http://www.amazon.com/Love-Beatles/dp/B000JK8OYU


Not sure what you are showing me here, I'm directed to a CD, however the point is DVD-A and SACD mostly carry copy protection which is illegal to circumvent. (Maybe you didn't know this, in which case may I remind you not to post any details at all about how you do this).

Why would I want video with the audio? When I play the songs I rip from CD, all I get on the TV screen is the cover art and some text.


Perhaps not.... I'd assumed that someone who wanted higher quality audio would want it with their videos as well as just their music. OK so that I understand, we are now talking about a device that will play 96/24 but only in stereo and only for audio only content.

What licensing cost?


Anyone who produces a device (or software) that uses someone else's technology, has to license that technology.

What court case?


I was only being cynical but if you didn't take out a license, that's what would happen.

What do you mean by "96/24 doesn't come in these limited formats"?


Forget that, it wasn't a good point and will likely lead us to discuss something we shouldn't be doing.

Dec 21, 2008 6:47 PM in response to speakerfritz

speakerfritz wrote:
"Oh and let's not forget there is no audio available in these formats. "

Very startling statement. Lets proceed with caution and ask questions if necessary.

Much DVD content is at 24bit@96hz


Not sure whether you were still typing when I made my previous post, the content you are talking is not legally available to copy and place on your computer

Dec 21, 2008 7:10 PM in response to Winston Churchill

Not all DVD-A and SACD discs have stereo channels, some only have stereo, some have both 6 and 2 channel audio, some are compressed some are not.


Specious at best. If one in a million DVD-A discs do not have stereo channels, your statement is correct. However, all of my DVD-A discs have stereo channels.


Not sure what you are showing me here, I'm directed to a CD,


Oops...
http://www.amazon.com/Love-CD-Audio-DVD-Beatles/dp/B000JJS8TM

The 96/24 audio on this DVD-A is stunning. Most definitely not compressed in any shape manner or form.

I did nothing to circumvent any copy-protection on this DVD-A. It is widely known that this DVD-A allows the players to output a 96/24 stream on the S/PDIF port. Many DVD-A's do not allow this. This one does.


Perhaps not.... I'd assumed that someone who wanted higher quality audio would want it with their videos as well as just their music.


Ah... assume... Did you ever watch the Odd Couple TV show?



Anyone who produces a device (or software) that uses someone else's technology, has to license that technology.


Yup, but not applicable here.


limited formats


Yes, I hate, but respect, DRM. One of the reasons why I will never, never, ever buy a digital download that is DRM-encumbered.

Dec 21, 2008 8:56 PM in response to camper

Specious at best......


We have different experiences (to be fair, they aren't my experiences, I'm more concerned with video, it's my friend that is the audiophile), a number of his SACD's don't have 96/24 stereo tracks and none of them are free from copy protection.

The 96/24 audio on this DVD-A is stunning. Most definitely not compressed in any shape manner or form.


I'm getting on, I don't notice the difference so much.
At 96/24 it wouldn't need compressing if it were the only track on the disc, and I'm not saying the tv wouldn't cope with 96/24 (I wouldn't know) but rather that it wouldn't cope with the content on all SACD's/DVD-A discs and between that, those tracks that are compressed and copy protection I think the feature would be rather limited.

Ah... assume... Did you ever watch the Odd Couple TV show?


I'm afraid I watched it the first time around but don't recall anything that holds a connection to assumptions. Personally I only listen to audio on the go, if I have the time I like to sit and watch and listen to music videos with ac3, but I couldn't listen to just 96/24 instead in that situation if it was one or the other, but I appreciate we are all different.

Yup, but not applicable here.


Why?

I suppose I can see why you might question why you can't play 96/24, but I feel that too many people just wouldn't understand the restrictions that limited them to a few of their SACD's/DVD-A's, most don't seem to understand why there isn't ac3 on all HD movies from itms.

Got to go, it's 5 am here and I'm tired.

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AppleTV Dac really 16bit@44.1khz sampling rate?

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