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Lightened Windows services:
Audible.
Probable reason -- less time-splitting of system operations
Increased memory timings to maximum smooth operation:
Audible.
Probable reason -- more consistent data transfer
Changing the card's DMA buffer size:
Audible.
Probable reason -- more consistent data transfer
Changing the audio software's buffers:
Audible.
Probable reason -- more consistent data transfer
Change the CPU frequency from 3.4 to 2.8 to 1.8 GHz:
Audible.
Probable reason -- less parasitic HF radiation
Changing the memory timings inside the BIOS:
Audible.
Probable reason -- more consistent data transfer
Playing the file from USB RAM drive instead of from Hard Disk:
Audible.
Probable reason -- less power supply spikes from Hard Drive
Playing the file from a deeply embedded folder instead of from top of directory:
Audible.
Seems to have same effect when file path name is maximum length, regardless of directory structure. Probable reason -- buffering issue, since the music playback software takes considerably longer to load the data prior to playback in these cases.
Filtering the PS of the computer:
Audible.
Reason -- Avoiding parasitic power supply fluctuations. This is just as important and audible in CD players and DACs.
Turning off the CRT monitor:
Audible.
Probable reason -- less HF radiation within the computer's schematics, and hence the audio card.
Unplugging all external devices, i.e. mouse, keyboard, monitor, etc:
Audible.
Probable reason -- less antenna effect, hence less HF radiation within computer schematics.
Even after all of these tweaks, the computer as source could not compete in clarity and low Jitter performance with a synchronously slaved run-of-the-mill NAD CD player. The DAC in all cases was the DAC 2004 with integrated volume control feature and all audio cabling and power filtering was LessLoss.
Further discussion regarding the audibility of computer parameters.
It is often falsely believed that parameters regarding only the digital domain do not affect the analogue results of the D/A process due to the fact that digital errors are neither introduced nor corrected by tweaking these parameters. The famous slogan for this school of thought is "Bits is Bits."
This train of thought is founded on the absence of direct experience and personal analysis of what Jitter at the D/A process sounds like. Nevertheless, we believe it is possible to appreciate the importance of Jitter reduction when seeking the highest quality digital-source playback even without direct experience with tweaking all of these parameters. We provide the reader with several thoughts about why these parameters do indeed lead to different discernable levels of quality after A/D conversion:
•A compact disc played back on different CD players which use different schematic layouts but almost identical parts can sound disctinctly different. Here we can appreciate the influence of a different schematic layout on the amount of Jitter-related distortion of the resulting analogue signal.
•CD players which use substantially different parts in only the digital schematics, but the same converter chips and schematic solution in the analogue schematics, also exhibit differences in analogue sound after conversion. Here we can appreciate the influence of the digital componentry on Jitter-related distortion.
•Desktop computers contain several sources of high frequency radiation. There are high frequency oscillators on the motherboard, on the soundcard, on the video card, and elsewhere depending on the specific computer configuration. All of these oscillators act as transmitters, transmitting HF electromagnetic radiation into the aether surrounding all the circuit paths located in the computer, and indeed into the very power supplies of the computer.
•The adjustable parameters such as memory allocation, buffer sizes, CPU speed, etc. are analogous to changing the physical componentry inside a CD player's digital schematics. Because most of this componentry is not programmable, the CD player is said to have "this" or "that" sound. CD players with SHARC processors are pre-programmed to manipulate the digital data streams in a specific way according to specific algorithms, resulting in the sound that the manufacturer of the player deems desireable. In this case the average user still does not have access to all parameters known to the manufacturer. Hence, again the CD player is deemed to have "this" or "that" sound.
•In a desktop PC situation, the computer is first and foremost a flexible platform for manipulating data streams. In this way, the user may wish to experiment with as many parameters of the streaming system he or she desires to. There are several discussions published on the web by experienced audiophile enthusiasts who have spent years tweaking their computers to obtain the sound they deem desireable. It is generally known in these circles that the deeper you delve into these parameters, the more one is struck by the audibility of their effect on the converted analogue signal.
•The only possible explanation to this phenomenon is that the timing of the data stream (Jitter) is being manipulated. It is known through attempts to quantify Jitter through mathematical statistical analysis of the converted analogue signal that the ear can hear Jitter amounts that on paper appear initially to be very insignificant. This shows clearly that it is not merely the amount of peak-to-peak Jitter that is significant to our ear's perception of its audible effect, but that its presence as an ongoing unstable phenomenon lends it its great distortive audibility.
•Also, throughout LessLoss's extensive experience with battling Jitter, it can be stated with authority that Jitter comes through a plethora of sources, and that this leads to a certain layering of the effects of Jitter, such that, when one successfully anihilates one source of Jitter, other sources with a lesser distortive effect become more apparant.
•Through the development and use of high-quality audio cabling, high quality power filtering, and customized electrostatic full-range loudspeakers, it is also known to us that several of the least significant layers of Jitter are not audible when one uses standard cabling or impure power supply voltages.
•We provide this information to those seeking the highest performance digital to audio conversion. It is the result of our experience and analysis, using the LessLoss DAC 2004 converter in Digital Master Mode, and using exclusively our signal cabling and power filtering technology.
