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This Post Has Been Edited by the Author
In Reply to: RE: BIS SACD posted by Disbeliever on June 09, 2012 at 02:37:16
This thread reminds me that my listening room background noise level goes up dramatically during the summer due to the hum of the air-conditioning unit in my room.The hum masks quieter noises. I did not know that the Oppo BDP-83 had obtrusive fan noise at first because I purchased and began using it during the summer.
Similarly, I moved into the new (listening) room during the summer and was not intially aware of a problem with ground loop hum and the hum of compact flourescent lightbulbs in the room (because these noises were drowned out by air conditioning noise).
I was in for a shock the following fall when the air-conditioning went off and all the spurious noises were revealed.
The ground loop problem was difficult to completely cure but I have been able to reduce the ground loop noise. I solved the humming flourescent bulbs by keeping the lights off during listening sessions.
Moreover, I work around the Oppo's fan (which is really loud in a low noise environment) by letting the player rest and cool down when it comes on. I can use my other players while the Oppo cools.
As for the BIS recordings...I certainly enjoy them more in a low noise environment (quiet passages in BIS recordings were drowned out by air-conditioning noise), but my main concern with BIS recordings is that up until very recently, they were not hi-rez, and as a result have (had) a chalky (think of the sound of chalk on a board), sand-papery quality that I don't hear in true hi-rez recordings (which sound silky and saturated with tone color in a way that most BIS recordings and all low rez PCM recordings do not).
I have noticed an improvement though with the most recent recordings (which sound like true hi-rez), such as the Respighi Pines with the Sao Paolo Philharmonic and the Bruch Concerto recording with Vadim Gluzman. The BIS people have said that all post-2009 recordings are indeed hi-rez. The Audessy spectrograph program could prove this, as can a listening session.
Edits: 06/10/12Follow Ups:
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