Why are DACs called Source components?
Mar 20, 2009 at 12:32 AM Post #2 of 34
Well, a computer or a CD player has both a transport and a DAC, and the DAC influences the sound the most, so it's not surprising that people consider a stand alone DAC as a source component. Does that make sense? Or did I miss the import of your question?
 
Mar 20, 2009 at 12:48 AM Post #5 of 34
A computer or CD player contain two basic components:

1. The source of the digital data
2. The Digital to Analog Converter (DAC)

The source can simply be thought of as that device which converts digital to audio. For many of us, the "source" is the DAC, be it a stand alone component, or simply part of the digital source device. A simple example would be a CD player or iPod; both source digital data and output an analog signal. A more complex example is a stand-alone DAC (e.g. Benchmark DAC1 or Cambridge DAC Magic) which accepts digital input (from an external CD transport, HD radio, computer, etc.) and converts to analog output.
 
Mar 20, 2009 at 1:01 AM Post #6 of 34
This is quite strange to me. Professionally, the term "source" means the originally recorded tracks. Even a CD itself is not the source of the digital data, it is mearly the distribution media, someone had to record the digital data in the first place, mix it and put it on to the CD.

G
 
Mar 20, 2009 at 1:17 AM Post #7 of 34
Source would be, in this context, source of analog signal? This would work for DACs and TTs.
 
Mar 20, 2009 at 1:27 AM Post #8 of 34
Quote:

Originally Posted by gregorio /img/forum/go_quote.gif
This is quite strange to me. Professionally, the term "source" means the originally recorded tracks. Even a CD itself is not the source of the digital data, it is mearly the distribution media, someone had to record the digital data in the first place, mix it and put it on to the CD.


Perspective is important, so please allow me to clarify. The "source" can be which ever part of the recording/playback chain we wish to call the source: musicians, microphones, mixing board, master tape, digital distribution media (CD, SACD, streaming digital audio, etc.), DAC, amplifier, or speakers/headphones. We end listeners likely have no control over the recording side of the chain, therefore, we can only control from the point after the "digital distribution media", which is the DAC.
 
Mar 20, 2009 at 1:55 AM Post #9 of 34
Quote:

Originally Posted by lamikeith /img/forum/go_quote.gif
Perspective is important, so please allow me to clarify. The "source" can be which ever part of the recording/playback chain we wish to call the source: musicians, microphones, mixing board, master tape, digital distribution media (CD, SACD, streaming digital audio, etc.), DAC, amplifier, or speakers/headphones. We end listeners likely have no control over the recording side of the chain, therefore, we can only control from the point after the "digital distribution media", which is the DAC.


yeah exactly. ive made another thread about this but got no reply, but what are the differences in the electronics between cheaper and expensive dacs?. i.e a $100, $1000 and $2000+. if i were to open it up what would i find that would be different? im talking about typical dacs.

im no electronics wizz so keep it as layman as possible.
 
Mar 20, 2009 at 2:40 AM Post #10 of 34
Quote:

Originally Posted by lamikeith /img/forum/go_quote.gif
Perspective is important, so please allow me to clarify. The "source" can be which ever part of the recording/playback chain we wish to call the source: musicians, microphones, mixing board, master tape, digital distribution media (CD, SACD, streaming digital audio, etc.), DAC, amplifier, or speakers/headphones. We end listeners likely have no control over the recording side of the chain, therefore, we can only control from the point after the "digital distribution media", which is the DAC.


I understand the perspective but I question the wisdom of it's use, here's my reasoning:

1. The term "source" is already used in the world of audio. "Go back to the source" is a phrase used in recording studios and more commonly in audio post (film & TV sound) and means go back to the original recording, IE. Before any processing or editing.

2. Surely, by definition, a Digital to Analogue Converter cannot be a "source". Doesn't it seem illogical to use the word "source"? Doesn't the very existance of a converter implicitely imply that it needs some sort of source material to convert and therefore can't be the source itself?

3. Why choose to use a term which is already used in the audio world (with a different meaning) which is likely, at some point, to cause confusion?

4. Am I managing to write this post while keeping a perfectly straight face? Nearly
smily_headphones1.gif


Seriously though, from my perspective, it does seem a bit silly
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G
 
Mar 20, 2009 at 3:20 AM Post #12 of 34
Quote:

Originally Posted by zantetsuken /img/forum/go_quote.gif
yeah exactly. ive made another thread about this but got no reply, but what are the differences in the electronics between cheaper and expensive dacs?. i.e a $100, $1000 and $2000+. if i were to open it up what would i find that would be different? im talking about typical dacs.

im no electronics wizz so keep it as layman as possible.



I'm not surprised no one has answered you, because I don't think many could, in layman's terms. The short answer is better quality components and better quality craftsmanship in a more expensive DAC. But I take this answer as a given, and that you were probably looking for something more specific. The problem is that much of what goes on in a DAC is on motherboards and computer chips. So the differences between DACs is, to a fair degree, about the computer chips and the many different processes they perform. It takes specialist knowledge to understand that stuff and some of the processes are trade secrets anyway!

G
 
Mar 20, 2009 at 3:26 AM Post #14 of 34
Quote:

Originally Posted by gregorio /img/forum/go_quote.gif
Why choose to use a term which is already used in the audio world (with a different meaning) which is likely, at some point, to cause confusion?



It seem that certain terms come to have a different meaning, or a broader meaning, in day-to-day usage, even though they may not be completely accurate or technically precise. People commonly use the term "source" on Head-Fi to refer to DAC's without much confusion, I think. I'm sure there are many other examples one could think of in this field and others if we gave it enough thought.

P.S. I'm flying to Pittsburgh next week. Although, actually, it's not me that will be "flying";but the plane, and I'll just be riding in it.
biggrin.gif
 
Mar 20, 2009 at 3:32 AM Post #15 of 34
Quote:

Originally Posted by PhilS /img/forum/go_quote.gif
It seem that certain terms come to have a different meaning, or a broader meaning, in day-to-day usage, even though they may not be completely accurate or technically precise. People commonly use the term "source" on Head-Fi to refer to DAC's without much confusion, I think. I'm sure there are many other examples one could think of in this field and others if we gave it enough thought.

P.S. I'm flying to Pittsburgh next week. Although, actually, it's not me that will be "flying";but the plane, and I'll just be riding in it.
biggrin.gif



Well if it this use of "source" doesn't cause confusion; why have six differnt people come up with six different explanations and why does this thread even exist??
smily_headphones1.gif


G
 

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