Re: [SlimDevices: Audiophiles] External DAC on Transporter: best output option

2017-06-15 Thread Golden Earring

arnyk wrote: 
> Surface Mount Device - a newer way to solder parts to circuit cards
> while avoiding soldering and bending wires and drilling holes in the
> circuit cards for those wires.  The parts are glued to the board with
> high temperature epoxy and soldered in an oven that melts solder on the
> boards to solder on the parts.  The parts can be very tiny, so
> magnifyling glasses are often used. Requires re-equipping and
> re-training people who assemble and repair the new style boards.

Thanks for the heads-up Arny!

I get the idea but don't think it's my idea of fun.

My oven's strictly for cooking...

Dave :)



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Re: [SlimDevices: Audiophiles] External DAC on Transporter: best output option

2017-06-15 Thread arnyk

Golden Earring wrote: 
> I'm all for a bit of fun.
> 
> What does "SMD" stand for, please? I'm having trouble understanding your
> banter, old chap!
> 
> Dave :)

Surface Mount Device - a newer way to solder parts to circuit cards
while avoiding soldering and bending wires and drilling holes in the
circuit cards for those wires.  The parts are glued to the board with
high temperature epoxy and soldered in an oven that melts solder on the
boards to solder on the parts.  The parts can be very tiny, so
magnifyling glasses are often used. Requires re-equipping and
re-training people who assemble and repair the new style boards.



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Re: [SlimDevices: Audiophiles] External DAC on Transporter: best output option

2017-06-15 Thread Golden Earring

Wombat wrote: 
> There is no need and i don't start threads about imaginary things i
> daydream to be heard just because i wasted 2000$ on something that adds
> no improvement.
> I sometimes mod things for fun because i can. How was your latest SMD
> soldering going?

I'm all for a bit of fun.

What does "SMD" stand for, please? I'm having trouble understanding your
banter, old chap!

Dave :)



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Re: [SlimDevices: Audiophiles] External DAC on Transporter: best output option

2017-06-15 Thread Wombat

Golden Earring wrote: 
> 
> I notice that you haven't explained your modded Transporter yet for our
> edification...
>  
There is no need and i don't start threads about imaginary things i
daydream to be heard just because i wasted 2000$ on something that adds
no improvement.
I sometimes mod things for fun because i can. How was your latest SMD
soldering going?



Transporter (modded) -> RG142 -> Avantgarde Acoustic based 500VA
monoblocks -> Sommer SPK240 -> self-made speakers

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Re: [SlimDevices: Audiophiles] External DAC on Transporter: best output option

2017-06-15 Thread Golden Earring

Julf wrote: 
> The ENOB (effective number of bits) of the sabre is 22 bits.

That's more SNR than I'm going to get out of my room.

Your point about available recordings is accepted.

Dave :)

P.S. Sorry for delay, I hammerited my nose! How I laffed...



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Re: [SlimDevices: Audiophiles] External DAC on Transporter: best output option

2017-06-15 Thread Golden Earring

Wombat wrote: 
> You surely were already from the start of your promotional trip. So many
> posts, so many brainfu** but no time to do even a small valid test...

Hi again Wombat!

I notice that you haven't explained your modded Transporter yet for our
edification...

Dave :)



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Re: [SlimDevices: Audiophiles] External DAC on Transporter: best output option

2017-06-15 Thread Julf

darrenyeats wrote: 
> FWIW, SoX uses 32 bit integer internally when passing data between each
> process step you specify.

Sure, and most DSP chips also use 32 bit (or more) *internally*.



"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] External DAC on Transporter: best output option

2017-06-15 Thread darrenyeats

FWIW, SoX uses 32 bit integer internally when passing data between each
process step you specify.

Each process step can internally use a higher resolution, some
calculations use 64 bit float.

SoX can also finally output 32 bit PCM as WAV, if you want.



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

SB Touch

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Re: [SlimDevices: Audiophiles] External DAC on Transporter: best output option

2017-06-15 Thread Wombat

Golden Earring wrote: 
> 
> I'm now starting to feel justified in my assertion that I'm getting
> superior audible output...
> 
You surely were already from the start of your promotional trip. So many
posts, so many brainfuck but no time to do even a small valid test...



Transporter (modded) -> RG142 -> Avantgarde Acoustic based 500VA
monoblocks -> Sommer SPK240 -> self-made speakers

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Re: [SlimDevices: Audiophiles] External DAC on Transporter: best output option

2017-06-15 Thread Julf

Golden Earring wrote: 
> P.S. As I understand it, it's got 4 Sabre DAC chips in it

The ENOB (effective number of bits) of the sabre is 22 bits.



"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] External DAC on Transporter: best output option

2017-06-15 Thread Julf

Golden Earring wrote: 
> Since the DAC will accept up to 32 bit 384kHz PCM (via USB input), I
> think the latter...

Or not. "32 bit PCM" most often means 32-bit floating point (that has a
resolution of 23 bits), not 32-bit fixed point. 

Anyway, 32-bit fixed point would not make any sense, as there aren't any
practical DACs with linearity and SNR that would exceed 24 bits. And, of
course, good luck finding a commercial recording with a SNR exceeding 16
bits.



"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] External DAC on Transporter: best output option

2017-06-15 Thread Golden Earring

Julf wrote: 
> Are we talking about 32-bit floating point (that has 24 bit resolution)
> or something with a resolution that is higher than 24 bits?

Hi Julf!

Since the DAC will accept up to 32 bit 384kHz PCM (via USB input), I
think the latter...

Dave :)



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Re: [SlimDevices: Audiophiles] External DAC on Transporter: best output option

2017-06-15 Thread Julf

Golden Earring wrote: 
> Of course back in 2008 Sean was still singing the praises of the fixed
> point 24 bit DAC chips inside the Transporter (which were famously
> marketed as "magic") & its 20ps jitter internal clock - but then there
> weren't any 32 bit DAC chips back then.

Are we talking about 32-bit floating point (that has 24 bit resolution)
or something with a resolution that is higher than 24 bits?



"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] External DAC on Transporter: best output option

2017-06-15 Thread Golden Earring

Hi all!

I've finally stumbled across Mr Adams himself discussing using an
external DAC to a Transporter, & his theoretical justification for the
best way to do it...

The discussion comes in a Slim Devices forum thread where Mr Adams is
(very patiently!) trying to explain to someone who has splashed out a
king's ransom on dcs high-end gear why it is the -*wrong*- approach to
use the word clock output from an externally boxed dcs "super clock",
here: http://forums.slimdevices.com/archive/index.php/t-39770.html

To justify his argument, Sean then goes on to reference the following
theoretical exposition (by an Italian chap, in slightly shaky English -
however the logic is quite clear):
http://www.tnt-audio.com/clinica/diginterf2_e.html

So there we have it at last. Sean put the word clock in on the
Transporter so that the preferred "backwards" configuration of
connection between transport & external DAC could be used.

Note that the point of the word clock connection is to prevent clock
*-drift-* not to eliminate jitter. It is made quite clear that the
digital jitter will be increased by connectors, cabling & the physical
distance between the clock & the DAC chip. However so long as the jitter
does not become so severe as to affect the actual bit stream, this will
not matter *-since the bit stream is re-clocked in the external DAC
right next to the DAC chip -*if the "backwards" connection arrangement
is used. So any increase in jitter up to that point will be totally
eliminated.

This "backwards" method of connection is precisely the way I have my
Transporter connected to my Mytek Brooklyn DAC, with the 0.8ps jitter
internal DAC clock (right next to the Sable 32 bit floating point DAC
chips) acting as the master clock for the slaved Transporter.

Of course back in 2008 Sean was still singing the praises of the fixed
point 24 bit DAC chips inside the Transporter (which were famously
marketed as "magic") & its 20ps jitter internal clock - but then there
weren't any 32 bit DAC chips back then.

I'm now starting to feel justified in my assertion that I'm getting
superior audible output...

Dave :cool:



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