ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hi all,
Just downloaded from here:
http://www.2l.no/hires/index.html
Mozart: Violin concerto in D major - AllegroMarianne Thorsen / TrondheimSolistene
in 24/192
But the sound is somehow scrambled, a lot kind of white noise.
I understood that the Essence should be capable of playing hi res.
Hi,
looking at my dealer's page I found:
FLAC is supported .... MP3/MWA/AAC, but - compression: 320 kBit/s
https://www.luxussound.com/de/bang-olufsen/audiosysteme/beosound-essence.html
I'm not familiar with this device, maybe someone else knows more?
In case Hi Res is supported, what's your playing source, a download from your computer's hard drive?
If you're curious about the performance of your system, the following samples contain a 30kHz and a 33kHz tone in a 24/96 WAV file, a longer version in a FLAC, some tri-tone warbles, and a normal song clip shifted up by 24kHz so that it's entirely in the ultrasonic range from 24kHz to 46kHz:
Assuming your system is capable of Hi Res playback, the following files should be completely silent with no audible noises, tones, whistles, clicks, or other sounds. If you hear anything, your system has a nonlinearity causing audible intermodulation of the ultrasonics. Be careful when increasing volume, running into digital or analog clipping, even soft clipping, will suddenly cause loud intermodulation tones.
.....
Further reading if necessary, look for IMD.
Hi Ulrike,
This is one kind of test - but only one kind... It's also potentially very dangerous to equipment (and dogs). For example, let's say that you don't have any IMD, but you do have a system that can play the >20 kHz tones in those files... then the reason it's "silent" is that you cannot hear it - but it could easily be that you're cooking your tweeters, which can make them permanently unhappy.
Also, if you DO hear something, it might not be due to IMD. Many audio systems these days have low-quality sampling rate converters in them, so it could be that you'll hear tones in the audible band, but for the wrong reasons. This could cause you to mis-diagnose the problem and blame the wrong component in the chain.
Cheers
-geoff
Hi Geoff,
if the audio system has been turned down to a reasonable or low level before playing the sound files, tweeters and dogs will not be unhappy.
Like I wrote before:
"Be careful when increasing volume, running into digital or analog clipping, even soft clipping, will suddenly cause loud intermodulation tones."
Low volumes, just enough to hear a sound, are no risk.
But if you think it's better ...
I'm going to delete those files from my previous post.
But what about the distorted sound and white noise stampfki got playing his Hi Res file?
Ulrike