Looks like the "bad" amp you use has real problems with low level signals. This might be a good candidate for the test with music, I mean it would be interesting to prepare test music files with your amplifier.
Okay, I did my best and tried hard, however the resulting extracted differential file has only linear distortions audible (caused by phase shifts due to subtle change in amplitude response with the amp), even if I tried the SW that should eliminate the phase shifts. So, with music, no audible crossover artifacts to be posted, sorry. I may try different music sample, but I doubt any success.
For those of you (and anyone who would like to participate again) who have complained on 16-bit resolution and music sample quality, I have prepared a new, much more "audiophile" test files at
http://pmacura.cz/toc549.zip
The files are in 48/24, the question is the same, please post your ABX result, but this time feel free to comment on your preferences and file sound impressions. Tested again track with and without the OPA549 amp, loaded this time by 6.8 resistor, for the reason that recording with loud playing speaker is really annoying.
http://pmacura.cz/toc549.zip
The files are in 48/24, the question is the same, please post your ABX result, but this time feel free to comment on your preferences and file sound impressions. Tested again track with and without the OPA549 amp, loaded this time by 6.8 resistor, for the reason that recording with loud playing speaker is really annoying.
Here my results for testing the occo and 400Hz archives
I already mentioned the "occo" result...
Well, I being honest here. The sine results are basically luck. I don't hear differences.
So I tested my equipment I've listened for limit
0.01% THD for a triode amplifier (at test volumes) is not too bad...
Measured in the secondary, since the Stax 'phones are connected to primary and is too high voltage for the audio board (and impedances)
Is clearly visible the crossover distortion for the "bad" file.
I will try to measure with my test microphone to see if this "appears acoustically"
Of course, even the best phones will have far more low order distortion than my amp or the test files.
Sometimes is fun to play with. But for me causes very bad anxious effects, so at least because of this I don't use much ABX
I already mentioned the "occo" result...
Well, I being honest here. The sine results are basically luck. I don't hear differences.
So I tested my equipment I've listened for limit
0.01% THD for a triode amplifier (at test volumes) is not too bad...
Measured in the secondary, since the Stax 'phones are connected to primary and is too high voltage for the audio board (and impedances)
Is clearly visible the crossover distortion for the "bad" file.
I will try to measure with my test microphone to see if this "appears acoustically"
Of course, even the best phones will have far more low order distortion than my amp or the test files.
Sometimes is fun to play with. But for me causes very bad anxious effects, so at least because of this I don't use much ABX
Attachments
I believe that the others, especially those who called for 24-bit files, will join us.
Yes, that's about my average although I did manage a 2/8 somehow
I still want to give these a more thorough listen but have been pushed for time today.
I am quite glad of the results of this thread, because it shows how complex this is and that any simplification based on 1 or 2 plots and numbers is quite invalid. I would like to turn attention to the result of mimi123
Test your ears in my new ABX test
as it shows that some amplifiers with very strange non-linearity may confuse the test results, see how his "bad amplifier" exaggerates low level signals by distorting them and thus changes test result. This is really very interesting. If he had not another, better amplifier, he could have said: "look, I heard it and have positive result!". And he supported the issue by measurement, which I appreciate very much.
Thanks for your listening impressions, Maty. I will reveal which file is which later, after we possibly collect more opinions, because I do not want to bias further listeners.
Now with ASIO4All and optimized like the others multimedia players. They sound very similar but I like more the Tocl.wav !!!!!!!
With DirectSound I can not differentiate.
With Wasapi I like more Tocl.wav
"optimized like the others multimedia players" : same rules in Process Lasso.
With DirectSound I can not differentiate.
With Wasapi I like more Tocl.wav
"optimized like the others multimedia players" : same rules in Process Lasso.
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Both Wasapi and ASIO almost always give cleaner analog output of the soundcard or DAC, than DS, Maty . The only way how to verify is to measure DAC output . Also, cards tend to work best at only one sampling frequency and with 24 bits. So it is very wise to use a SW resampler and feed the card with the format that gives the cleanest analog output .....
So it goes.
. The only way how to verify is to measure DAC output . Also, cards tend to work best at only one sampling frequency and with 24 bits. So it is very wise to use a SW resampler and feed the card with the format that gives the cleanest analog output ..... So it goes.
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