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In Reply to: RE: Stereo vs Surround Sound? posted by JohanV on June 01, 2011 at 01:11:48
I tried for the best of both worlds with an all Revel 7.1 system. It was great and 2 channel music was terrific as well, but my life circumstances have changed (got divorced, moved to a smaller place) where 7.1 seemed to be overkill, so I put all the surrounds and the sub into storage and just use the Revel Studios.
I REALLY like the new set up. I find movies just as engaging, the bass from my full range speakers is solid (at least to 30kHz) and the soundstage 3D and solid to the point where I'm not missing the surround effects.
I can't say that I won't go back to at least 5.1 when I have the right room, but I don't think I will suffer in the meantime. I do think that my situation might be a bit exceptional with the Studios, a Halcro MC7 set up in bi-amp configuraton, Anthem D2 PrePro and Oppo BPD 93 with EquiTech and Richard Grey backing it all up.
I suspect though, with proper speaker positioning and a sub-woofer if necessary, that most folks could be pretty happy with a 2 or 2.1 channel set up for their music and movie sound needs.
Follow Ups:
My cousin bought a Sony scd-xa5400es sacd player and uses the HDMI output for playback of multi-channel sacd on his Sony AV receiver. I do not take Mch HDMI audio serious when using an AV receiver. The Sony sacd player has also an analog stereo output, which I think is a better option.
Not everybody is enthusiastic about the sound quality of HDMI. See the article The Well-Tempered Computer, an introduction to computer audio.
I don't have experience with multichannel HDMI audio. I use the 2ch HDMI from the Oppo into the Anthem DACs.
Sony AV receivers do DSD down sampling to LPCM (1-bit/2.8224MHz DSD to 30 bit/176.4kHz LPCM) and all its DSD uniqueness is diminished.
Edits: 06/07/11 06/07/11
Regardless of input, Anthem D2 DSP output is 24bit/192kHz. So I'm not sure what effect that has on audio quality with unknown jitter from the Oppo HDMI digital audio output.
I've been happy with the results and glad I didn't spring for the Oppo 95, where I would have bypassed the Anthem D2 DSP for $600 more clams.
Regardless of input, the Anthem D2 DSP output is 24bit/192kHz.
The integrity of the DSD signal (1-bit/2.8224MHz) is down sampled to LPCM and all its uniqueness is diminished.
I found a link on a discussion on the Computer Audio Aslyum for HDMI.
Edits: 06/08/11
Have you compared 2ch HDMI with 2ch analog playback? The jitter with HDMI audio is much higher than with analog playback. My Sony scd-xa9000es sacd player has only a jitter of 176ps peak to peak according to Stereophile.
Edits: 06/07/11 06/07/11
I asked Oppo customer support about HDMI jitter. Here is their reply:
We do not have any written documentation on the jitter rate over HDMI as issues with jitter errors are related to the downstream equipment and not the player itself. As long as the receiver relies on our clock or on the information embedded in the video clock then there will be no decoding errors downstream.
Best Regards,
Customer Service
OPPO Digital, Inc.
2629B Terminal Blvd.
Mountain View, CA 94043
Service@oppodigital.com
Tel: 650-961-1118
Fax: 650-961-1119
I don't know what Anthem does with regards to HDMI DSP. I'll see what I can find out.
The problem with HDMI audio is that the DAC receiver has to synchronize the data bitstream with its internal master clock. Maybe there is also a difference in the jitter for 2ch and 5.1ch playback.
Edits: 06/07/11
This is what I found for a SONY TA-DA5600ES DSD to PCM (2ch/176.4kHz 5.1ch/88.2kHz) audio conversion. Audio playback of DSD and PCM are crippled by the AV receiver.
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