Re: [SlimDevices: Audiophiles] Transcode and upsample at once?

2012-05-07 Thread JJZolx

I doubt that this is doable within the transcoding framework. It just
wasn't designed with that sort of flexibility in mind.

One thing I do know is that you don't want the output type in SoX to be
WAV if PCM is the target. You need to use the output type 'raw' in SoX,
as the Squeezebox will be expecting a headerless stream. With type WAV
you're probably hearing a click at the beginning of each track, which is
the WAV header being played.



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Re: [SlimDevices: Audiophiles] Audiolabs M-DAC

2012-05-07 Thread tank121

gw43 wrote: 
 I'm thinking of getting the M-Dac, and I also have an Arcam A85. Did you
 try it in power-amp mode, and if so where there any benefits over using
 the A85 as an integrated amp?

Either way sounds great. I'm personally using it in Power mode once
you've purchased it you can then Install 
Triodes plug in and experiment with Usb v Coaxial. I'm still undecided
as currently there is very limited amounts of 192 material.

Coxial can handle it but usb cant



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Re: [SlimDevices: Audiophiles] Low Jitter mods

2012-05-07 Thread alfista

Archimago wrote: 
 Even without bringing out the 'measure' word, I'd like to know how the
 OP KNOWS the mods affect jitter at all?
Lacking measurements, I'll settle for anything that corroborates the
claims regarding jitter.



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Re: [SlimDevices: Audiophiles] Blind listening - TT3.0, HWmods and Teddy Pardo PSU

2012-05-07 Thread Willakan

Make no mistake: I'm not singling it out as flawed, just saying that it
was probably also flawed. I'm very much on the worthless claims are
worthless bandwagon.



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Re: [SlimDevices: Audiophiles] Blind listening - TT3.0, HWmods and Teddy Pardo PSU

2012-05-07 Thread Soulkeeper

Willakan wrote: 
 I can't seem to work out whether the test was between the digital or
 analog outputs though...

In other words; The test's 'reproducibility'
(http://en.wikipedia.org/wiki/Reproducibility) can be expressed in a
non-non-zero number.



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Re: [SlimDevices: Audiophiles] How old are these audiophile reviewers???

2012-05-07 Thread SteveCresswell

mlsstl wrote: 
 The mental image of an audiophile in the 1960s was a handsome young
 fellow in his smoking jacket, holding his pipe while pulling out a hot
 jazz album to put on the turntable to impress the beautiful young lass
 sitting on the sofa nursing a highball. 
 
 What's the mental picture of an audiophile in 2012? An aging, paunchy
 fellow, sitting all by himself, wondering which set of magic cables will
 expand the soundstage of the 10th remaster of a multi-miked and
 overprocessed classic rock album by 6 inches. 
 
 And one wonders why the hobby doesn't have much appeal for the young
 trendy types these days.  The world has simply moved on. 
 
 ;-)

You must be joking!

it's 2012 and at over a weekend the end of May, as we have done since
2006, 
my fellow DIY valve amp hobbyists will be having our six monthly meeting
in a local pub function room.
We have a great time and we certainly DONT believe in exotic wires or
any of the other foolery that goes with the outer limits of this hobby.
This is how I'll be dressing for the occasion.

[image: http://dl.dropbox.com/u/7181882/81693.jpg]



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Re: [SlimDevices: Audiophiles] How old are these audiophile reviewers???

2012-05-07 Thread Soulkeeper

A modern audiophile has little in common with a DIY hobbyist. One of the
biggest differences is that the DIY hobbyist needs to know something
about how things work, while the modern audiophile only needs a computer
keyboard and a dictionary of superlatives.



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Re: [SlimDevices: Audiophiles] How old are these audiophile reviewers???

2012-05-07 Thread mlsstl

SteveCresswell wrote: 
 You must be joking!
 
 It's 2012 and over a weekend the end of May, as we have done since 2006,
 
 my fellow DIY valve amp hobbyists and I will be having our six monthly
 meeting in a local pub function room.
 We have a great time showing and listening to our latest creations and
 we certainly 
 DONT believe in exotic wires or any of the other foolery that goes with
 the outer limits of this hobby.
 

There are always exceptions to any rule, but that doesn't change the
reality that audiophilia is a shrinking hobby for an aging male
population.

I note you admitted that you are a DIY tube amp hobbyist, building your
own stuff. Now that's a subsect of a subsect! ;-) It's neat that you
have some fellow travelers and get out and about with them, but that
hardly makes it a widespread popular trend. 

Unfortunately, the magic wire and tweak got its foothold in the hobby
for two reasons. First, the price competition, especially with big box
stores and internet sales, for speakers and gear got so intense that
those remaining on the sales side desperately needed some high-margin
stuff. Second, the level of technical interest in the hobby
(particularly at your DIY level) subsided over the years which left a
base of consumers who were perhaps a bit more susceptible to the pitches
for magic wires. 

It is certainly a more complex phenomenon than that with lots of other
factors to consider, but the hobby certainly isn't what it used to be,
nor will it ever return to what it once was.



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Re: [SlimDevices: Audiophiles] Blind listening - TT3.0, HWmods and Teddy Pardo PSU

2012-05-07 Thread mlsstl

Willakan wrote: 
 Make no mistake: I'm not singling it out as flawed, just saying that it
 was probably also flawed. I'm very much on the worthless claims are
 worthless bandwagon.
 
 I can't seem to work out whether the test was between the digital or
 analog outputs though...

A lot of people find it tempting to denote things only as black or
white, with no possible territory in the middle. 

The perfect blind test will never exist, but that shouldn't keep us
from drawing conclusions regarding the cumulative weight of the somewhat
less-that-perfect tests that have been performed over the years. 

The conclusion I've drawn from everything I've seen over the years is
solid proof that we are human. Under sighted conditions (i.e., with
knowledge of the make/model we're listening to at the moment), our
comments are dramatic and full of hyperbole. 

As the knowledge-of-conditions slider moves slowly toward blindness, the
differences reported get smaller, less certain and sometimes even
disappear. 

Anyone who doesn't admit the obvious - that we are easily susceptible to
subjective factors - is whistling past the graveyard.



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Re: [SlimDevices: Audiophiles] How old are these audiophile reviewers???

2012-05-07 Thread SteveCresswell

Oh yes DIY tube amp building is definitely a subsect of a subsect, but
of our 30 strong group, there are  younger members
the youngest being 18.
Plus there is my son, who is 28, has built several of his own tube amps
and has a small business making and selling hand-crafted wooden
chassis.
There are others who also have small businesses making and selling self
designed and built loudspeakers.
I totally agree that the hi-fi business is doomed if it carries on as it
is doing and peddling voodoo to the gullible.
I know that in the UK there is something of a return to the roots of
hi-fi as it was in the fifties, with enthusiasts building their own
gear.
The days of mass market hi-fi have gone forever and the industry will
have only itself to blame when the end comes.

It is salutory to note that all of our DIY group once used nothing but
commercial gear, but have rejected it completely as it was nothing more
than a money pit,
that produced mediocre sound quality.

Here is a sample set of pictures of the stuff we do

First my system comprising home designed and built valve amplifier
feeding my own design Metronome tapered quarter wave loudspeakers.
[image: http://dl.dropbox.com/u/7181882/801asystem.jpg][image:
http://dl.dropbox.com/u/7181882/801aglowshot2.jpg]
Below is another fellow DIY hobbyist's hand crafted speakers that he
builds to order.
[image: http://i49.photobucket.com/albums/f296/Dingsking/IMG_2756a.jpg]

Yes I suppose we are part of an underground movement
but in our neck of the woods it is getting bigger.
There is still life in the old Hi-Fi scene, if you know where to look.



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Re: [SlimDevices: Audiophiles] How old are these audiophile reviewers???

2012-05-07 Thread ralphpnj

mlsstl wrote: 
 Unfortunately, the magic wire and tweak got its foothold in the hobby
 for two reasons. First, the price competition, especially with big box
 stores and internet sales, for speakers and gear got so intense that
 those remaining on the sales side desperately needed some high-margin
 stuff. Second, the level of technical interest in the hobby
 (particularly at your DIY level) subsided over the years which left a
 base of consumers who were perhaps a bit more susceptible to the pitches
 for magic wires. 

Great insight! I never thought of the Magic/Monster Cable phenomena from
the sales/margin prospective. That goes a long in helping to explain why
the mass market audio retails so willingly push overpriced cables onto
the unsuspecting public.

Mass market Blu-ray player: $79 with a razor thin profit margin.

Magic HDMI cable: $79 with a super wide profit margin.

Total: $160 with a workable profit margin.



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Re: [SlimDevices: Audiophiles] Low Jitter mods

2012-05-07 Thread ralphpnj

alfista wrote: 
 By what method have the jitter been measured and how much did it
 improve?

Archimago wrote: 
 Even without bringing out the 'measure' word, I'd like to know how the
 OP KNOWS the mods affect jitter at all? I've tried all these years and
 have never been convinced I've actually 'heard' jitter...

alfista wrote: 
 Lacking measurements, I'll settle for anything that corroborates the
 claims regarding jitter.

But gentlemen the effects of and sound of jitter has to exist and be a
very BIG problem otherwise why would the audiophile have its collective
panties in a knot over asynchronous USB? ;) :) ;) :)

Current state of the art audiophile approved computer music playback
system:

Apple MAC mini: $600 - $800

Apple approved external hard drive: $130

USB cable (MAC mini to external hard drive): $200

External DAC with asynchronous usb input: $600 - $6000

USB cable (MAC mini to external DAC): $200

Additional software to ensure a bit perfect digital audio data stream:
$700

Total cost: $2430 - $8030

Lower cost semi-audiophile approved alternative:

El-cheapo desktop computer: $300

External hard drive: $80

Generic USB cable (computer to external hard drive): $10

Squeezebox Touch: $300

External DAC without asynchronous usb input: $400 - $6000

Digital coax cable (Touch to DAC): $20

Music server software to ensure a bit perfect digital audio data stream:
included with Squeezebox Touch

Total cost:$1110 - $6710

Notes:

1) Both systems assume that there is a working ethernet/Wi-fi router
available.

2) Touch system only audiophile approved for background listening to low
bit rate internet audio streams.



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Re: [SlimDevices: Audiophiles] Blind listening - TT3.0, HWmods and Teddy Pardo PSU

2012-05-07 Thread Willakan

mlsstl wrote: 
 A lot of people find it tempting to denote things only as black or
 white, with no possible territory in the middle. 
 
 The perfect blind test will never exist, but that shouldn't keep us
 from drawing conclusions regarding the cumulative weight of the somewhat
 less-that-perfect tests that have been performed over the years. 
 
 The conclusion I've drawn from everything I've seen over the years is
 solid proof that we are human. Under sighted conditions (i.e., with
 knowledge of the make/model we're listening to at the moment), our
 comments are dramatic and full of hyperbole. 
 
 As the knowledge-of-conditions slider moves slowly toward blindness, the
 differences reported get smaller, less certain and sometimes even
 disappear. 
 
 Anyone who doesn't admit the obvious - that we are easily susceptible to
 subjective factors - is whistling past the graveyard.

Agreed, but I still don't see why more emphasis wasn't placed on
discussion of the test conditions from the get-go, to establish whether
it could be classed as meaningful and/or to attempt to reproduce it.



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Re: [SlimDevices: Audiophiles] Triode's USB 24/192 plug in - sound quality impressions

2012-05-07 Thread lake_eleven

JohnSwenson wrote: 
 I have a HRT Music StreamerII (not the +), it works very well with
 Triodes plugin and a hub. Adding TT3.0 significantly improves the sound,
 with this combination it's getting astonishingly good.  (it's not the
 best, my homebuilt DAC still blows it away). The II with TT3.0 is
 sounding better than several other way more  expensive S/PDIF input DACs
 I have. (except for my own design -- I'm not biased am I?)
 
 I had to do a little work to get TT3.0 to work with it, I had to set the
 buffer to over 5000, and I had to change some of the priority settings.
 The esiest way to change the priorities was to just turn them off all
 together. I didn't have time to figure out which one caused a problem. 
 
 I tested the screen off part of TT3.0 and it didn't make any difference
 so I left the screen on. The part of TT3.0 that seemed to make the
 difference was the kernal settings, when I implemented just them I got
 the same sound improvement. 
 
 
 John S.

John, 
I have placed my order for HRT Music Streamer II+, hence very interested
to learn the changes to your system with HRT. I have:
- Installed EDO
- Installed TT3.0 over it
- Changed priorities in TT file to Logitech default
- Made the changes suggested by SBGK on the various .lua files
- My buffer setting in the .lua files are 4200
- Disconnected screen
- Removed Toslink on SBT

You are also suggesting kernel settings change. Can you share what the
kernel changes are?. Also what buffer size is best.



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Re: [SlimDevices: Audiophiles] Blind listening - TT3.0, HWmods and Teddy Pardo PSU

2012-05-07 Thread aubuti

Willakan wrote: 
 Agreed, but I still don't see why more emphasis wasn't placed on
 discussion of the test conditions from the get-go, to establish whether
 it could be classed as meaningful and/or to attempt to reproduce it.
NoRoDa has provided a lot of the details of test conditions in various
posts in this thread and the thread to which he linked when starting
this thread. Btw, it is easy to find those posts by clicking on the link
that shows NoRoDa's username, and then choosing View Forum Posts. Also
don't forget to see the ancillary material by member baardbaard, who
was also involved in the tests.

Perhaps most important, NoRoDa has already said that the test ...wasn't
double blind or very scientific in any way..., which may be why more
details were neither offered or requested by other forum members. But
now that you're a part of the discussion, feel free to ask about details
that haven't been included yet. My take-away from NoRoDa's disclaimer is
that that time would be better spent trying to improve the protocol
rather than trying to reproduce it. Having two SB Touch players to test
side-by-side seems to be a critical improvement over (almost?) every
other comparison that has been posted on this topic in this forum, which
generally compare the same Touch before/after mods.



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[SlimDevices: Audiophiles] Display Off screensaver

2012-05-07 Thread Triode

I will post this here as its clearly unproven and something to discuss
on the audiophile board

I've just posted a new app to the repro for Squeezebox Touch - this
provides an alternative to the built in Screen Off screensaver which
disables some of the processing associated with the screen when the
screen is off.  It does the same as TT screen off + also disables some
internals to the squeezeplay application related to rendering the screen
when it is off (reducing cpu load for scrolling text etc when the screen
is off).

The intention is you may want to try it as a when playing screensaver
which will bank the screen after the delay and hence use less cpu power.
Whether this has an impact on the audio quality is unproven and the
reason I am posting here...

To install: On the player goto 3rd Party Apps, unselect recommended
Apps only and then select Display Off

[As an aside - I note that with the EDO app installed and the internal
digital out selected so that the analog output is not enabled, if you
measure the analog outputs on an oscillocope then you see a much lower
noise floor than when the analog dac is enabled.  At the limit of my
simple scope's gain I can see noise which is related to cpu activity - I
believe looking at this, that disabling the screen does have a
measurable impact, but it is very much at the limit of what I can see
and well below the normal noise floor of the analog output.  Whether
this impacts what you can hear is a completely different matter]



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Re: [SlimDevices: Audiophiles] Display Off screensaver

2012-05-07 Thread lake_eleven

Triode wrote: 
 I will post this here as its clearly unproven and something to discuss
 on the audiophile board
 
 I've just posted a new app to the repro for Squeezebox Touch - this
 provides an alternative to the built in Screen Off screensaver which
 disables some of the processing associated with the screen when the
 screen is off.  It does the same as TT screen off + also disables some
 internals to the squeezeplay application related to rendering the screen
 when it is off (reducing cpu load for scrolling text etc when the screen
 is off).
 
 The intention is you may want to try it as a when playing screensaver
 which will bank the screen after the delay and hence use less cpu power.
 Whether this has an impact on the audio quality is unproven and the
 reason I am posting here...
 
 To install: On the player goto 3rd Party Apps, unselect recommended
 Apps only and then select Display Off
 
 [As an aside - I note that with the EDO app installed and the internal
 digital out selected so that the analog output is not enabled, if you
 measure the analog outputs on an oscillocope then you see a much lower
 noise floor than when the analog dac is enabled.  At the limit of my
 simple scope's gain I can see noise which is related to cpu activity - I
 believe looking at this, that disabling the screen does have a
 measurable impact, but it is very much at the limit of what I can see
 and well below the normal noise floor of the analog output.  Whether
 this impacts what you can hear is a completely different matter]

Can this be installed over EDO and TT3.0



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