Tag Archives: DirectStream

Asheville, Walnut Cove, Biltmore Forrest and Western North Carolina’s Audio and Home Theater specialists present Cane Creek AV and Paul McGowan – PS Audio, Intl.

This is kind of a funny post, although more technical than most would want to read about.

I use PS Audio’s DSD DAC and it is a fantastic sounding digital player, made even better by the occasional updates to it that PS Audio offers for free.

Simply, the player takes our digital music, say music that we have copied onto a hard drive of some sort (computer, phone, iPod, etc) and then makes real music out of it that we can listen to.  At some point, the digital file is turned into music we can listen to and that is called a digital to analog conversion, or DAC.

Is no DAC the best DAC?

I’ve been answering a lot of great customer questions on Ask Paul. One of them was a simple misunderstanding, but it sparks good dialog.

On the DIY forums, a poster suggested he was converting digital audio to analog without the benefit of a DAC and the question posed to me was, “Is that possible?” The answer should be a simple “no” but then it’s never quite that simple.

Let me first explain what the poster on the DIY site was doing: converting DSD to analog with little more than an output transformer. Thus, he didn’t need a “DAC” to make music, he needed only a single part.

DSD is very different than traditional PCM. If you were to try the same technique of decoding PCM with a simple capacitor, you’d get nothing but noise (if you got anything at all). This is because PCM isn’t anything close to analog, while DSD is as close to analog as any digital format can be. Look at PCM on a scope and you see nothing recognizable as music (it’s a code, after all). Try the same thing with DSD and you can actually see the music.

This difference is one reason why our digital guru, Ted Smith, converts everything to DSD in our DirectStream and DirectStream Junior. Their output stages are essentially simple low-pass filters (like the transformer I mentioned earlier). DSD is already close to analog and requires very little post-processing.

In direct answer to the reader’s question whether it’s possible to play digital music without benefit of a DAC, I would answer, no. Anything used to convert digital to analog is, by definition, a DAC.

Asheville, Walnut Cove, Biltmore Forrest and Western North Carolina’s Audio and Home Theater specialists present Cane Creek AV and Paul McGowan – PS Audio, Intl.

Format wars

Whatever happened to the format wars? We lost sleep over FLAC , WAV, DSD vs. PCM, MQA in competition with everything else.

Did our playback equipment suddenly get so good that these various formats now perform with varying degrees of excellence rather than acceptability?

I can tell you that playback of 44.1kHz through DirectStream is so close to higher resolution formats that one has to question the need to purchase higher resolution media. But that’s just us in a sea of other DACs.

Have we, as an industry, elevated playback quality to such a degree that the wars are over? Is there a white flag flying that I missed?

It’s hard to know if the most vocal among us got tired of the battle, or found peace in the improved performance.

I do appreciate a lull in the battles.