Re: Outputting multichannel sound through the optical link??
Re: Outputting multichannel sound through the optical link??
- Subject: Re: Outputting multichannel sound through the optical link??
- From: Ryan Walklin <email@hidden>
- Date: Wed, 10 Feb 2010 18:38:24 +1300
On 10/02/2010, at 3:05 PM, William Stewart wrote:
> I think I've been clear in my statements about what we have supported in released products.
>
> I see little future for SPDIF - you can't even use it to reliably transfer 24bit audio at 48kHz - and there is no discovery mode that can tell you whether what you are doing is even supported or possible... It is quite possible to output Dolby Digital or DTS over spdif and listen to very nasty noise.... To make a better user experience you really need to know what the capabilities of the devices are - so the EDID mechanism of HDMI/DP is a fine solution to this. ADAT is even worse than SPDIF from a compatibility point of view (less devices support it), so I see no future in this.
>
On the contrary, I think SPDIF has a long future ahead, at least in consumer 5.1 audio.
HDMI certainly is becoming ubiquitous, but I don't think any of the new lossless HD audio formats offer a significant gain on DTS/DD audio to encourage adoption in consumer hardware. They certainly don't offer a compelling reason to daisy-chain adaptors as has been suggested. Nearly all existing receivers support DD/DTS over SPDIF, all shipping Macs do, and there is an extensive ecosystem around it.
Certainly I've found 5.1 AC3 at 448kbps and above to be transparent, and 5.1 AAC to be transparent at 384kbps. I suspect a lot of the "difference" between these compressed formats and lossless encoding is in the mixing and dynamic range.
-Ryan
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