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    Ahhhgggg this isn't private!!
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    Hey Dennis, wanted to let you know I still have the test file and plan to run the tests soon. Wanted to this weekend but screwed up my knee Saturday, which slowed me down. (Pain in the rear being gimped, will be calling the doctor Monday.) But I'll tough it out and get it done! :)
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About esldude

Basic Information

Audio System
Music Server(s):
Lenovo server
Music Server Operating System:
Linux
Preferred Digital Interface(s):
USB
Digital to Analog Converter(s):
Tact XP
Digital to Digital Converter:
Audiophilleo 2
Preamplifier:
Tact XP
Amplifier(s):
Wyred4Sound ST500
Loudspeakers:
Soundlab Aura Electrostats
Interconnects:
Monoprice and Wyred4Sound balanced
Loudspeaker Cables:
AQ Cobalt from long ago.
Power Cables:
Aural Symphonics
Remote Control Apps:
Numerous mostly Android based.
Headphones:
Sony MDR 7510, Beyer DT880 and Creative Aurvana
Headphone Amplifier(s):
HeadRoom or Focusrite
Portable Player(s):
Galaxy S3 or Nexus 7.
About Me
Location:
USA

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Highly informative video about how digital audio really works.

Clears up many digital audio misconceptions.

http://xiph.org/video/vid2.shtml

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Audio System
Music Server(s):
Lenovo server
Music Server Operating System:
Linux
Preferred Digital Interface(s):
USB
Digital to Analog Converter(s):
Tact XP
Digital to Digital Converter:
Audiophilleo 2
Preamplifier:
Tact XP
Amplifier(s):
Wyred4Sound ST500
Loudspeakers:
Soundlab Aura Electrostats
Interconnects:
Monoprice and Wyred4Sound balanced
Loudspeaker Cables:
AQ Cobalt from long ago.
Power Cables:
Aural Symphonics
Remote Control Apps:
Numerous mostly Android based.
Headphones:
Sony MDR 7510, Beyer DT880 and Creative Aurvana
Headphone Amplifier(s):
HeadRoom or Focusrite
Portable Player(s):
Galaxy S3 or Nexus 7.

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View esldude's Blog

Recent Entries

Why I never got that perfect null in difference testing part one

by esldude on 08-23-2012 at 12:03 PM
I set out to see what the difference between expensive analog interconnects and cheap ones were. My method was simple in essence. I would send a signal to a DAC, send the analog output over an interconnect, record that digitally with an ADC. Then repeat with a different cable. Take the two digital files and subtract one from the other using software. There was a long thread posted in the general forum about my attempts. I learned some things along the way and eventually could get consistent

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Updated 08-23-2012 at 01:10 PM by esldude

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Why I never got that perfect null in difference testing part three

by esldude on 08-23-2012 at 01:56 AM
Timing in my compared files, how do I compare timing in files?

Clearly none were as much as one single sample off. I had figured out ways to align all files to the single bit. I put one second of silence at beginning and end while putting one bit in the middle of the silence to maximum in the test files. So just record a few seconds before and after. Then align the signals in Audacity and chop off the ends with single bit precision. When the clocks were locked no other obvious

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Updated 08-25-2012 at 08:33 PM by esldude

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Why I never got that perfect null in difference testing part two

by esldude on 08-23-2012 at 12:29 AM
Okay, so difference testing didn't result in perfect nulls with only thermal and flicker noise left. Why not? The most obvious answer is a difference in level between the two signals recorded. With null depths of more than 100 db it takes very little level difference to leave a bit of the music above the noise floor. So I sent simple two or three tone test signals through comparing them. Using the same equipment and cable changing nothing. Had left equipment on for minimum of three full days

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Updated 08-24-2012 at 02:56 PM by esldude

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Trust your ears? Trust your measurements? Look to psycho-acoustics for help? Is the psychology of being human the most important thing?

by esldude on 06-25-2012 at 09:43 PM
I am going to quote Barrows here. It is a complete post on his careful methodology of listening. I quote because I think it is an excellent description of how to audition for differences in components. I agree with it completely. He was responding to Julf's question about how he listened carefully:

Well, thanks Julf... As far as listening goes, I suspect that each of us may find things we can do differently, that is, what works for me, may not be the same for you. But

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Rational audio....a subjectivist journey.

by esldude on 10-12-2011 at 05:34 AM
Rational Audio....a subjectivist journey.

I began audio as a rational consumer or so I thought. I didn't want to spend money that didn't provide additional performance. Mainly because I didn't have much to spend. I wondered for instance why those Magnepan speakers cost so much when they didn't go down below 50 hz and only went up to 15 khz. So many speakers went lower and higher with less power for less money. With my first real job came a chance to buy a good stereo. I purchased

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