External hard drives and sound quality

"If you are going to use a PC for a "high quality" digital front end, you really should not be doing D/A in it. Send the PCM stream to an external Firewire or Asynchronous USB based DAC. That way nothing needs a clock till it gets from the memory buffer to the DAC chip inside a "non-noisy" enclosure."

Agree with that and suggest network players (wired or wireless)designed specifically for home audio use is another very good way to isolate the DAC process from the inherently noisy PC environment, which CAN affect the analog domain if the DAC process occurs there.

Interestingly, I have a few CDRs that I recorded from internet radio via analog output from my computer to system and CD recorder early on a couple years back. When I listen to these today along side everything else, they are noise free and hold up pretty well.

However, I think in general analog output from a potentially noisy computer can be problematic so I think that isolating the DAC process as mentioned is a best practice even though good results might still be had.

There are plenty of grey areas for end users in the arena of upper end audio, let alone the now addition of industrial appliances like personal confusers we want to add to the presiding mix.

Trial and error and A versus B versus C etc, still shines the best light towards gaining both exp and performance increases. In the best of scenarios I think we can only emulate and never duplicate the exp of one members trials in some other members situation. So we approximate and consider different approaches.

The only points then of contention are Empirical evidence . Not those of subjective association. In every area other than purely measured evidentiary relms, we must at times agree to disagree, or merely accept those results for what they are unique individual experiences that likely can not be duplicated or replicated. The truth then lays with the perception of the beholder.

Any closer or further insights then will come directly from the attempt to emulate someone else’s particular scenario as best one can for all practical intents and purposes .. or those results can be simply accepted as that person’s unique findings, as I previously indicated. Nothing more.

Unless we can put a clock on it or a meter.. or some other widely accepted measuring apparatus it’s all hearsay and not point of fact reasoning. Arguing such a thing then seems fruitless for seldom does every party have likewise past events in common or even in recent memory.

True too, even measured events can be argued on several points.

At those instances, perhaps it is best to input “Oh yeah? How about that! Good for you. Maybe I’ll check that out myself someday more closely.” Or some such yada yada stuff.

It’s very likely too, there’s an element of truth in each account.

FWIW

Once folks begin to view the PC/Mac as an actual high end audio or video component instead of just a ‘pc’, and address it as such as mentioned somewhat here in this thread, your listening experience and operating performance will, or can be elevated.

Ever try opening up the tower’s case by simply removing the side cover? I do it to all my boxes. It reduces the ‘electrical’ noise level . Though not the rest of the noises it makes such as the video cards fan, drives etc. If outside the listening room in a closet or something, this does indeed help to that one end.

Putting a layer of thin closed cell foam on it if left in place will help reduce it’s overall ambient noise factor too. Simply adding or laying material over the top and either side of the tower will deaden it’s noise level too. the esthetic there however is up to the owner, as to just what they’re willing to do or how fancy they’ll get.

Another approach some projector owners use for their more noisey projectors are “hush boxes”. Enclosures such as those seem to me to have enough worth to nvestigate for those whose drives and/or computers reside in the listening environment itself, and not in some ‘sequestered’ area.

At every turn we get to ask ourselves repeatedly, the same question, “Just how deep down the rabbit hole are we going to go this time for this change or replacement, or addition to our system?”

As for outright ambient or back ground noise levels in drives Every online or big box store I’ve done any buying from has a return policy. Buy one and try it. If noisey send it back and try another. The actual degree of noise given off from one unit to another these days is so minimal as to not be critical.

If the noise level is critical the owner MUST then take additional measures to amend things. Eg., above.

Lots of long posts here on this thread...

I'm in the middle of testing an external drive again (as I had over a year ago with a Dell laptop). This time, with a macbook.

Both times (with the Dell and now the Macbook), the external drive made a difference for the better. And others on other forums say the same thing. I can a/b pretty easily by loading up the external drive's library in Itunes and then loading up the internal drive again for comparison of the same music.

I wouldn't take my word (or Blindjim's or Mapman's for that matter), you will have to try it for yourself. Drives are fairly cheap.

BTW, I do think it is a good idea to use an external hard drive for music files for various practical reasons.

For one thing it offloads the file access from the internal drive which is where OS and other files needed for basic computer operation resides. THis generally should result in better throughput (data can be read faster). IT also is safer to have a drive dedicated to music files in case the computers drive has to be rebuilt for some other reason.

It is also possible that some playback software could take liberties with sound quality as a means of dealing with delays in reading disk data which is more likely in general if the files are stored internally. I do not know specifically of a music playback program that does this, but it is certainly possible, and not a solution that audiophiles would take to. There are other ways to handle this but sometimes a computer can get so bogged down with various processing that goes on in the background, that all the bits are not availble in time when needed for playback.

So in general, using an external drive for music files can be considered a best practice I believe (I do it) even though the same data files with the exact same amount of musical information is available regardless of storage location. Its just the safest and most practical approach to take.

BTW, using a networked music player, like the Rokus in my system or Logitech Squeezebox, absolutely makes the origin of the music files a moot point in regards to sound quality. These are essentially dedicated, optimized, computer devices designed specifically to play back music. They cache the data locally in memory for fast, optimal access when needed and then forward bits on to the DAC (internal or external) in real time without issue. The only issue that can occur with these is a weak network data connection from server to network music player, and/or a slow running server, which together may result in the bits not being cached and ready to go when needed. The result in this case is a silent delay in playing until all the needed bits are cached. Sound quality is for sure not compromised when playing though.

If you use computer for anything else (I do) - use Firewire interface instead of USB. USB is loading main processor while Firewire is a little more intelligent and has own processor that handles transfers - less load on main uP. I also think that daisy chaining in Firewire is cleaner/better than USB hub. Firewire cable cannot be longer than 15ft (10ft for USB). Extra 5ft might be important if you want to hide disk (noise).