Re: [SlimDevices: Audiophiles] What sort of quality do people get when they download so-called "Hi Rez"

2018-01-05 Thread Mnyb

Archimago wrote: 
> Happy New Year everyone!
> 
> Yup. No surprise about the paicity of actual hi-res music. For years
> HDtracks has been releasing upsampled music. And few of the recordings
> of course achieve anything close to needing beyond 16-bits if even that.
> Years ago, I wrote the article on "'Hi-Res Expectations'
> (http://archimago.blogspot.ca/2014/03/musings-high-resolution-audio.html)"
> and I see absolutely nothing has changed over the years.
> 
> I wondered back then and still today just how much of this stuff they're
> actually selling... Hard to imagine a big market.

A bit bigger than imagined . It’s them and some other similar outfit or
lossy ?

You buy so called hirez or MP3 wonderful :D so I sometimes get 24/96
from them well aware what i get . When I fail to find any other lossles
source or does not want to import a CD ( why send polycarbonate discs
around the world ). Or wants something rigth now .




Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH 2 x
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Re: [SlimDevices: Audiophiles] What sort of quality do people get when they download so-called "Hi Rez"

2018-01-05 Thread Archimago

Happy New Year everyone!

Yup. No surprise about the paicity of actual hi-res music. For years
HDtracks has been releasing upsampled music. And few of the recordings
of course achieve anything close to needing beyond 16-bits if even that.
Years ago, I wrote the article on "'Hi-Res Expectations'
(http://archimago.blogspot.ca/2014/03/musings-high-resolution-audio.html)"
and I see absolutely nothing has changed over the years.

I wondered back then and still today just how much of this stuff they're
actually selling... Hard to imagine a big market.



Archimago's Musings: (archimago.blogspot.com) A 'more objective'
audiophile blog.

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Re: [SlimDevices: Audiophiles] What sort of quality do people get when they download so-called "Hi Rez"

2018-01-05 Thread Mnyb

Yes this is a quite common case the existing master is 44,1kHz or
sometimes 24/48 which seems to be the popular music standard some niche
audiophile or some classical labels may use higher resolution but they
are the exception .

But it does not really help with much of thier content which is much
baby boomers rock from the 70’s even captured in glorious 384kHz or DSD
that analog tape still has less resolution than reedbook 16/44.1 kHz .

Now I make my piont :) the actual technical spec is completely
uninteresting as soon as it is 16/44.1 or better .
What would matter is which master they source .

If you truly wanted to sell HD or “Hi Fi” versions of anything you would
select the masters with great care ,curated by humans .
Not just making sure the dowloadfiles have big impressive numbers. That
would include asking labels to actually not send their latest remaster
effort in some cases , these are sometimes plagued low dynamic range and
accompanying “ loudness war “ problems .
But something else that the aficionados of a certain work/artist
preferrers . It could in some cases actually be the latest carefully
made remaster so I don’t dismiss all remasters.


( some goes for so called hifi streaming services, who just lets the
labels upload whatever they fancy without any QC ) .

I would truly be an imidiate custommer if some service or shop provided
definitive versions of the music or choices if they are several well
liked versions




Main hifi: Touch + CIA PS +MeridianG68J MeridianHD621 MeridianG98DH 2 x
MeridianDSP5200 MeridianDSP5200HC 2 xMeridianDSP3100 +Rel Stadium 3
sub.
Bedroom/Office: Boom
Kitchen: Touch + powered Fostex PM0.4
Misc use: Radio (with battery)
iPad1 with iPengHD & SqueezePad
(spares Touch, SB3, reciever ,controller )
server HP proliant micro server N36L with ClearOS Linux

http://people.xiph.org/~xiphmont/demo/neil-young.html

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Re: [SlimDevices: Audiophiles] RC (Inguz etc.)

2018-01-05 Thread W0153R

CLIPPING
InguzDSP creates a few files in /usr/share/InguzEQ/, after you've set up
Inguz there are 2 files of interest: error & log.txt. You can check for
errors with:

Code:

cat /usr/share/InguzEQ/error


It should give you no output at all.

The file log.txt can get big and we're only interested in the latest
data so we'll use 'tail' to just give us the end of the file and print
any new information as it comes in:

Code:

tail -f /usr/share/InguzEQ/log.txt 


If there's clipping going on, it will print 'CLIPPING+' or 'CLIPPING-'
and something along the lines of:

Code:

20180105181413: 01:53:01:53:01:02 2387377 samples, 404442.711 ms (1610.266 
init), 0.1335 * realtime, peak 0.865 dBfs


We're only interested in the last bit, the peak-value, a peak > 0 means
clipping.
The log will also contain the following information:

Code:

20180105181939: 00:04:20:16:cd:70 24/96000 PCM => 24/96000 PCM TRIANGULAR, 
gain -16 dB


Once again, we're only interested in the last bit, the gain, if you're
experiencing clipping you should adjust it.
In the above example a gain of 1dB lower would already prevent the
clipping. To adjust the clipping enter the following in a terminal:

Code:

sudo nano /usr/share/squeezeboxserver/Bin/i386-linux/InguzDSP.exe.config





RESAMPLING
By default InguzDSP will turn off when LMS needs to resample (except for
MP3 & OGG-files). I've added extra profiles to Plugin.pm that allow for
resampling and even upsampling. There are 4 extra profiles in there: 
template_FLAC24_resample: allows for resampling when necessary and spits
out 24bit FLAC's
template_FLAC16_resample: allows for resampling when necessary and spits
out 16bit FLAC's
template_FLAC24_upsample192 and template_FLAC24_upsample96: upsampling
to respectively 24bit/192kHz and 24bit/96kHz

InguzDSP uses 24bit filters and all processing is done in 24bit,
template_FLAC16_resample turns it back into 16bit after the processing
is done.

On line 3596 of the attached Plugin.pm you'll find 2 extra if-statements
checking for the squeezebox-model, you should adjust here if you want to
use a certain profile. 
I've got a Receiver (which can playback 24bit/48kHz) so I've got it
setup to apply the FLAC24_resample-template when the modelname equals
'receiver', and I've got a SqueezeLite-box with a soundcard that can
only do 16bit/48kHz so I've got that setup to use the
FLAC16_resample-template.
You can find the model-name of your device on LMS-settings page. If
you've already got InguzDSP set up, replacing the Plugin.pm-file and
restarting LMS twice should take care of the settings but you might have
to delete the file 'custom-convert.conf' in the same folder
(/usr/share/squeezeboxserver/Plugins/InguzEQ/) before restarting.


+---+
|Filename: InguzEQ_Plugin.pm_resampling.zip |
|Download: http://forums.slimdevices.com/attachment.php?attachmentid=24300|
+---+


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Re: [SlimDevices: Audiophiles] What sort of quality do people get when they download so-called "Hi Rez"

2018-01-05 Thread Jeff07971

stereoptic wrote: 
> Nice analysis, but I am confused as to the relationship between how the
> people at HDTracks look, and the quality of the downloads?  Is there a
> particular high resolution facial structure?  ;)

No they just have bat ears ! ;)



*Players:* SliMP3,Squeezebox3 x3,Receiver,SqueezeLiteX,PiCorePlayer
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