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Post by Greg on Jun 25, 2015 22:02:31 GMT
Free Buddhist Audio - Resurrecting those old hits you know so well...
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Post by aurender on Jun 25, 2015 22:09:24 GMT
In my Saturday job a very long time ago, I remember the acronym FBR which was used to describe those ghetto blaster things people used to carry round.
When I asked what FBR stood for, I was told it was short for "rather large radio"
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Post by MartinT on Jun 26, 2015 6:51:49 GMT
The lack of colouration seems to me to be the critical aspect. IMHO, a CDP based system introduces its own colouration to the sound. A file based flac system does not. Simples! (IMHO) Greg, if you don't mind, this needs analysis.
An FBA has a streamer to send the originating file (FLAC or WAV) to a DAC, which then generates the analogue audio. A CDP has a mechanism which reads the file (WAV) into a DAC, which then generates the analogue audio.
In a perfect world (which I know it isn't), the external DAC you're using and the internal DAC inside the CD Player would be identical. The method of extracting the data would also be perfect. In this artificial scenario, the two methods would sound the same. The question then becomes: where in reality is the sound in the CDP being coloured? My guess is very much in the internal DAC, although poor optical reading, poor error correction, gross jitter etc. on the digital side will certainly have its impact too. If you were to send the CDP's digital output to the same DAC as you use for FBA, you are eliminating another difference in the chains.
What I am saying is that there is nothing inherent in CD replay that causes colouration.
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Post by aurender on Jun 26, 2015 7:29:41 GMT
The read speed is very different. The actual file is rather less digital than one would imagine.
The addition of noise elements can either increase or decrease apparent sound quality
The fact that the addition of digital noise in some forms will improve sound quality is a little confusing initially but it is about the ability of such noise ( or dither ) to bring low level information in the audio file above 1 bit instead of below 1 bitwhere they disappear. That is standard practice in audio recording and some replay systems.
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Post by MartinT on Jun 26, 2015 8:41:34 GMT
CD read speed is real-time whereas FBA read speed can be very fast. Data clocking speed into the DAC is always real-time, though.
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Post by Deleted on Jun 26, 2015 10:46:34 GMT
What I am saying is that there is nothing inherent in CD replay that causes colouration.
A fair analysis Martin Although the use of valves in the output stages of CD's and dac's could cite a 'pleasant or desirable colouration'
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Post by MartinT on Jun 26, 2015 11:06:06 GMT
I no longer see the point of adding valves to a circuit in order to sound 'valve-like'. I don't want it to sound of anything at all.
I was going to say that there is pretty much nothing you can't do with transistors these days, however PS Audio have claimed that a tube was necessary (balanced differential input) in order to drive their new MOSFET power amp (BHK Signature) in the configuration they desired, which makes interesting reading in itself. See here.
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Post by stanleyb on Jun 26, 2015 12:07:04 GMT
What they mean is that they didn't know how to design a MOSFET amp properly without using a valve. Elektor did some marvellous MOSFET power amps circuits that did not need a valve. Both of the circuits that I remember were completely differential from input to output. So it can be done without a valve.
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Post by MartinT on Jun 26, 2015 12:10:54 GMT
That's fighting talk, Stan! I used to devour Elektor from the very first issue. What a great mag that was.
My Chord is a fully differential MOSFET design. I'm still interested in loaning a BHK to try in my system, though. Not many power amps take my fancy, but that one does.
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Post by gazjam on Jun 26, 2015 14:17:35 GMT
In my Saturday job a very long time ago, I remember the acronym FBR which was used to describe those ghetto blaster things people used to carry round. When I asked what FBR stood for, I was told it was short for "rather large radio" Heh. Kind of like the Naim FBL speakers
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Post by gazjam on Jun 26, 2015 14:22:23 GMT
Can valve power amps be accurate? *edit* See what I did there?
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Post by Deleted on Jun 26, 2015 15:37:46 GMT
My old Linx 'Stratos'monoblocks were the best MOSFET amps i ever heard..
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Post by John on Jun 26, 2015 17:39:46 GMT
Can valve power amps be accurate? Do most people really want accuracy?
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Post by Deleted on Jun 26, 2015 17:42:22 GMT
No way hosay
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Post by MartinT on Jun 26, 2015 17:59:44 GMT
Do most people really want accuracy? I do. I want it untainted, whatever was laid down on the master tape.
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Post by John on Jun 26, 2015 19:29:14 GMT
Perhaps but truth can be unpleasant
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Post by Deleted on Jun 26, 2015 21:04:41 GMT
Martin don't you think that amps with near perfect distortion fugures are not as nice sounding as one with more distortion figures?
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Post by stanleyb on Jun 26, 2015 21:32:27 GMT
Distortion figures are a false measure of judging an amp's performance. It's lime miles per gallon and other such marketing hypes that can quickly be exposed as fraud when subjected to real life usage.
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Post by MartinT on Jun 26, 2015 22:37:06 GMT
Agreed, distortion figures don't tell the story. Remember the 'perfect' first Hitachi MOSFET power amp? Perfect specs, flat sound.
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Post by gazjam on Jun 26, 2015 23:56:55 GMT
Be going the 300B power amp route soon, and knowing the "pleasant distortion" point of view of valve amps (to some) wondered what you guys thought. Hence the open ended question.
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