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Old 27th April 2009, 09:21 PM   #401
surfstu is offline surfstu  United Kingdom
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has anyone taken delivery of the tamura transformers yet?

stuart
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Old 27th April 2009, 10:48 PM   #402
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Quote:
Originally posted by surfstu
has anyone taken delivery of the tamura transformers yet?

stuart

Still waiting... Filling in the time looking into bit perfection.
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Old 27th April 2009, 10:56 PM   #403
surfstu is offline surfstu  United Kingdom
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Bit perfection? another perfectionist like myself....

is this the process of getting bits to flow perfectly from harddrive, through media player, through operating system and out of soundcard?

if so, i used j river media player a few years back to send flacs through an asio 2 driver enabled soundcard out of spdif....

so now i have to do a refresher course as have not been using digital tunes for a few years, but would love to hear your version of bt perfection to kll some tme

keep us updated about tamuras

cheers stuart
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Old 27th April 2009, 11:16 PM   #404
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I have been following this thread with great fascination, and have ordered an upsampled dac board and a couple of Sescom line trans. to play with. My nephew, who is an IT guru, tells me that everything that originates from a PC is bit perfect :bs:

Bill
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Old 27th April 2009, 11:29 PM   #405
surfstu is offline surfstu  United Kingdom
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i don't think that everything from the pc is bit perfect.....

i think you have to configure the pc so that the media player avoids the operating system drivers that mess with the 'bits'. I did this by using asio drivers for the soundcard.

stuart
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Old 27th April 2009, 11:55 PM   #406
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Quote:
Originally posted by surfstu
Bit perfection? another perfectionist like myself....

is this the process of getting bits to flow perfectly from harddrive, through media player, through operating system and out of soundcard?

if so, i used j river media player a few years back to send flacs through an asio 2 driver enabled soundcard out of spdif....

so now i have to do a refresher course as have not been using digital tunes for a few years, but would love to hear your version of bt perfection to kll some tme

keep us updated about tamuras

cheers stuart
As far as I get it, bit perfection is getting bits from source file (in my case FLAC) to SPDIF (coax or optical) untinkered - i.e. no resampling, no volume adjustment, no inside-a-toilet effects etc etc.

This page is a good description. The guy has written drivers for soundcards based on a certain chipset (here) to provide bit perfect output.

Tonight I had a good shopping trawl and ended up with one of these should you need one. Nice and cheap! Next best price was this.


Cheers

Oli
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Old 28th April 2009, 12:07 AM   #407
surfstu is offline surfstu  United Kingdom
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cheers Oli,

i use a presonus firebox, but only because i dabble in recording music too, the card looks good, good price too... personally i have always used spdif, not sure if ths card has one? Seems like you've found bitprice perfection!

Still looking forward to legarems verdict on the tamura transformers....

will the resistor that is put across the secondaries depend upon the input resistance of my preamp?

stuart
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Old 28th April 2009, 12:43 AM   #408
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We're getting way OT now, ain't we.
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Old 28th April 2009, 07:50 PM   #409
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Just to clarify, S/PDIF is a data protocol/spec. The S/PDIF signal can travel over either a coax or optical cable. It seems to be well debated as to which is better - which says to me they're about equal! I'll stick with optical to isolate DAC from my noisy PC. NB I saw this other cheap bitperfectable sound card which has coax output.

This issue very relevant to getting best out of our lovely DACs but, yes, it is all rather off-thread, so I'll shut up now!
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Old 29th April 2009, 04:40 PM   #410
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Back to the chinese High End "DIY" DAC:

I sent to Marc a pair of Digitecs, as he has the most different tranny types to compare with.

Let's wait for his experience!

In the meantime, I finished to build in my small Super Pro 707 DAC in an enclosure, including PSU and output trannies:

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

The first finished project for some (long) time

But: now I recognize, the simple circuit of this small DAC is really different than the upsampling 192kHz DAC, the object of this thread.

The upsampling DAC is much better than the small 707.

The big one is superb!

So, I plan to build it also in a separate enclosure and I will order a second one, to build it in to the Studer 52 amplifier, I mentioned before in this thread.

Franz
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