Re: [SlimDevices: Audiophiles] Newest USB Technology. Trust your ears!

2015-11-27 Thread SuperQ

pippin wrote: 
> "What happened when I did it 8 times just blew my mind!"

I wonder what happens when you take it to 11.



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Re: [SlimDevices: Audiophiles] Newest USB Technology. Trust your ears!

2015-11-27 Thread pippin

"What happened when I did it 8 times just blew my mind!"



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Re: [SlimDevices: Audiophiles] Newest USB Technology. Trust your ears!

2015-11-27 Thread kidstypike

pippin wrote: 
> Sorry, the link is in German but maybe Google Translate can reveal all
> the marvel of this product to English speakers, too.
> 
> It's a USB stick that improves the sound quality of your CD recordings
> when you copy them. Just plug it into a USB port on your computer and
> then copy the CD to your harddrive and burn a new CD from it. The sound
> will gain more power, clarity and detail and the sound stage improves!
> 
> People who tested it on their booth were generally overwhelmed!
> 
> http://www.albat-online-shop.de/REMASTER-PLUS-System
> 
> No drivers required, I assume

Hmmm... well, if I took the newly burned CD and copied that to my
hard-drive and burned a new CD from it ?



kidstypike 

LMS on Raspberry Pi 2 model B/max2play/HiFiBerry DAC+ > AVI DM5

1 x SB3 - 1 x Boom - 1 x (Squeezebox) Radio - 2 x Touch - 2 x Raspberry
Pi/max2play/HiFiBerry

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[SlimDevices: Audiophiles] Newest USB Technology. Trust your ears!

2015-11-27 Thread pippin

Sorry, the link is in German but maybe Google Translate can reveal all
the marvel of this product to English speakers, too.

It's a USB stick that improves the sound quality of your CD recordings
when you copy them. Just plug it into a USB port on your computer and
then copy the CD to your harddrive and burn a new CD from it. The sound
will gain more power, clarity and detail and the sound stage improves!

People who tested it on their booth were generally overwhelmed!

http://www.albat-online-shop.de/REMASTER-PLUS-System

No drivers required, I assume



---
learn more about iPeng, the iPhone and iPad remote for the Squeezebox
and
Logitech UE Smart Radio as well as iPeng Party, the free Party-App, 
at penguinlovesmusic.com
*New: iPeng 9, the Universal App for iPhone, iPad and Apple Watch*

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Re: [SlimDevices: Audiophiles] Post on AudioVero's Acourate...

2015-11-27 Thread Mnyb

Yes I depend on Meridians DRC below 300 hz since 2004 it sure does some
wonderful things , I read that people have problems integrating
subwoofers :) not with a DRC system ( you have basically never "heard"
your sub it's so entangled with the room nodes that you normally can't
separate them )




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] New AKM 4490 DAC

2015-11-27 Thread Mnyb

It really depends on what it drives , most active amps and preamps have
input impedance  of 10kohm or more in some cases much more . So it's not
per Defenition a problem driving a power amp directly . With the wrong
power amp or preamp you can have an issue .

If I remember rigth some old professional standards have 600ohm as
recommended input impedance such a component would be a problem for the
touch to drive , especially if its output impedance varies with
frequency ( or the driven amp,or preamp has similar issues varying input
impedance .

So just take care when pairing the Touch almost every normal component
is ok . But some old pro stuff may not be ok or some of the more
esoteric audiophool equipment , where they left sensible design practice
in the dust can be issues .

I have tried some of my squeezeboxes with a semi passive gamut preamp a
decade ago, and it sounded polite , just as suggested :) but that's not
what I consider good equipment today .. 

Their are two ideas here .

Source very low impedance preferably 0 ohm no variation in the audible
range 20-20k amp high impedance 20kohm or more also linear within 20-20k
.

Impedance matching source and sink should have the same impedance ( say
600ohm ) and also the reactive parts should match and be close to 0 so
both source and sink should be close to resistive with the same
impedance , a more old school aproach .

As an off topic side note in industrial electronics ( where I work ) we
have ditch both these ideas in the 60-70's going for current source
transmission of analog signals ( in the rare case of using an analog
signal at all ) 0-20mA or 4-20mA this is much more resilient to long
cable lengths etc than trying to send a voltage the sender is a current
source ( near infinite impedance ) and the recieving end is like 100 or
500 ohm ( preferably 100ohm high impedance inputs are prone to noise
pickup , low impedance inputs basically " shorts " incoming noise ) the
nice thing is that impedance can be whatever within a certain range
current is current in a series circuit , this topology is linear until
the source can't drive the circuit anymore usually due to the power
supply which is usually 24 volts if that can't make 20mA there is a
problem , but all is fine until you hit the limit .

I think Krell used this idea for a while with some proprietary interface
between amp and preamp , naturally touted as a revolutionary idea :) (
besides the fact that any nearby industry had this for decades  )




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] New AKM 4490 DAC

2015-11-27 Thread Julf

darrenyeats wrote: 
> When I connected my Touch directly to my SCM50s I found it a bit
> "stunted" at the frequency extremes

How did you determine that? Usually a high output impedance causes a
slight drop in high *or* low frequencies depending on the configuration
of the amp it is driving, but not both at the same time.



"To try to judge the real from the false will always be hard. In this
fast-growing art of 'high fidelity' the quackery will bear a solid gilt
edge that will fool many people" - Paul W Klipsch, 1953

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Re: [SlimDevices: Audiophiles] New AKM 4490 DAC

2015-11-27 Thread MichaelJ

Squeezemenicely wrote: 
> In the other thread you stated your age, this has also something to do
> with it. I am just shopping for varifocals - so I am also getting used
> to the idea that some things do not get better as age progresses. ;-)
> This is not ageism, just a fact.
I totally agree. That's why I said YMMV. While I can still hear up to
13kHz, there is a roll off above 8kHz. 
Think of the $$ I'm saving on not needing super tweeters!:)



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Re: [SlimDevices: Audiophiles] Post on AudioVero's Acourate...

2015-11-27 Thread jfo

I started using a TacT room correction system about 2000, including the
preamp/processor and digital amps. Room correction became the one thing
I would not be without. The TacT system allowed 9 presets for different
correction curves. After much experimenting, I eventually settled on 2
or 3 that I used for different music...rock, acoustic jazz and
classical. They were all set to address the fundamental room issues in
the bass region, but with small tweaks to satisfy my particular
preferences. Dr. Uli Brueggemann was a regular contributor to the TacT
forum, contributing his free "Good Vibrations" software which added
additional features to the TacT program. Uli then went on to create his
Acourate system, and he has extensive experience. 
I had to change my system  a couple of years ago to address my new
dedicated home theatre/music room and after much searching went with an
Anthem pre/pro with their ARC multi channel room correction. It works
well but is not nearly as flexible as something like Acourate or the now
discontinued TacT. 
Given your interests and tech background, I'm sure you will spend many
hours playing with the program!



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Re: [SlimDevices: Audiophiles] New AKM 4490 DAC

2015-11-27 Thread darrenyeats

cliveb wrote: 
> In what way is an 800 Ohm output impedence "weak"?
> Line level outputs on sources typically have an impedence of about 1k
> Ohm, so the Touch's 800 sounds entirely normal to me.
Well the Transporter is much more like it (100 or ohms via RCA). My DAC1
is 60 ohms via XLR. When I connected my Touch directly to my SCM50s I
found it a bit "stunted" at the frequency extremes, compared to the
DAC1, though otherwise really rather good. I attributed this to the
output impedance since the Touch is generally blameless otherwise,
including frequency response of course.

FWIW I found out about the output impedance being 800 ohms quite some
time later.
Darren



Check it, add to it! http://www.dr.loudness-war.info/

SB Touch

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Re: [SlimDevices: Audiophiles] New AKM 4490 DAC

2015-11-27 Thread Squeezemenicely

Greg Erskine wrote: 
> Can you state what is the age group of people can respond to your posts?

Oh come on. You probably know exactly what I mean. Obviously our hearing
changes with age and is different with 70.

But also if trying to hear the difference in audio equipment, it is best
if you have not been partying at a Technoclub all weekend and made your
ears bleed.

Just reminds me of when I thought, there is no big difference in SD TV
and HD, until I got glasses and was pretty amazed - I thought my sight
was pretty perfect before.



LMS 7.9.0 on Pi2 (Max2play)
Synology DS-414 NAS
Squeezebox Touch, Squeezebox Boom, Squeezebox Radio, HifiBerry
PicorePlayer
Schiit - BIFROST AKM 4490 Dac
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[SlimDevices: Audiophiles] Post on AudioVero's Acourate...

2015-11-27 Thread Archimago

Hey guys, as per previous discussions I just posted my experience of
Acourate on my blog.

Neat program with good functionality and feedback on construction of
optimal room correction filters. Does take a bit of know-how but IMO
worth it for those with interest in the technical bits and computer
audio familiarity. At 286E here in North America, not too expensive IMO
and certainly does a heck of a lot more objectively than many more $$$
worth of cables, USB tweaks, and such!

http://archimago.blogspot.com/2015/11/measurements-digital-room-correction.html

Cheers...



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

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Re: [SlimDevices: Audiophiles] New AKM 4490 DAC

2015-11-27 Thread Greg Erskine

Squeezemenicely wrote: 
> In the other thread you stated your age, this has also something to do
> with it. I am just shopping for varifocals - so I am also getting used
> to the idea that some things do not get better as age progresses. ;-)
> This is not ageism, just a fact.

Can you state what is the age group of people can respond to your
posts?

>12 < 29



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Re: [SlimDevices: Audiophiles] New AKM 4490 DAC

2015-11-27 Thread Squeezemenicely

MichaelJ wrote: 
> I had been using the über version of that DAC. After setting up a
> passive pre amp and A/B comparing it with the analog op of the Touch, I
> sold the Bifrost. This was a subjective evaluation onlymy ears, my
> equipment, my room. YMMV.

In the other thread you stated your age, this has also something to do
with it. I am just shopping for varifocals - so I am also getting used
to the idea that some things do not get better as age progresses. ;-)
This is not ageism, just a fact.



LMS 7.9.0 on Pi2 (Max2play)
Synology DS-414 NAS
Squeezebox Touch, Squeezebox Boom, Squeezebox Radio, HifiBerry
PicorePlayer
Schiit - BIFROST AKM 4490 Dac
Spotify Premium

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Re: [SlimDevices: Audiophiles] New AKM 4490 DAC

2015-11-27 Thread cliveb

darrenyeats wrote: 
> The analogue output of the Touch measures well, I like the harmonic
> distortion profile (reducing distortion into higher orders, regarded as
> "musical"). The main weakness is a weak output impedence of 800 ohms
> meaning it should be used with an active preamp or integrated (not
> direct to power amps or actives).
In what way is an 800 Ohm output impedence "weak"?
Line level outputs on sources typically have an impedence of about 1k
Ohm, so the Touch's 800 sounds entirely normal to me.



Transporter -> ATC SCM100A

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Re: [SlimDevices: Audiophiles] New AKM 4490 DAC

2015-11-27 Thread darrenyeats

The analogue output of the Touch measures well, I like the harmonic
distortion profile (reducing distortion into higher orders, regarded as
"musical"). The main weakness is a weak output impedence of 800 ohms
meaning it should be used with an active preamp or integrated (not
direct to power amps or actives). Check out Stereophile for JA's
measurements.
Darren



Check it, add to it! http://www.dr.loudness-war.info/

SB Touch

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