PS Audio CD Transport clarification

I currently have a DirectStream DAC and would like to send it raw DSD at some point. I’m trying to find the differences between the models or versions, but it’s still not that clear to me.

  1. Current - PerfectWave SACD Transport. Plays SACD and can send raw DSD to the DirectStream DAC. This one was the was the easy one, but I’m looking at used, or at least at a significant discount. I can’t justify paying this much for a CD player yet. I say CD Player, so it’s easier to justify why I can’t pay that much. lol
  2. Older - DirectStream Memory Player (DMP). I identify this one by seeing the little USB between the touchscreen and the CD Tray. Does this play SACD and send raw DSD like #1? It says it plays high resolution audio from CDs and DVDs, but I haven’t seen it explicitly say that it plays SACD.
  3. Oldest - PerfectWave CD Transport (PST). This one has the touchscreen and no USB like #2. This does NOT play SACD. but will make redbook CDs sound great. This is a redbook player from what I’ve seen.

Is #2 or #3 the one that has the 30 second buffer?

This is what I’ve been able to gather. Any help would be appreciated.

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Yes to Q number 2; via DoP, AFAIK:


You have one more option. That is to skip the disc spinner. I have the new PSAudio transport but I still enjoy streaming. You can rip your SACD’s and stream them to your DSDac. It works flawlessly and at DSD256 thanks to Ted’s updates.


Oh man, I haven’t even had a chance to look into streaming yet. I’m going on a bit of a tangent here but… If I have ripped SACDs on my computer hard drive, is streaming it to my DAC the only way to play DSD?

I’m so used to adding the mp3s to my media player and hitting play. I have to “Stream” it?

The Directstream Memory Player DMP does play SACD DSD layer to Directstream DAC. The Original PWT will play DSD via DOP files recorded to a DVD but will not play the DSD layer of an SACD

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You’ve done well with your research. You’re on the right track as far as identifying our transports. Only the PST (current transport) and the DMP are able to send the DSD layer to your DAC. You’re right, the oldest transport (PWT) was mainly a redbook player. The PWT was the one that had the largest buffer, but depending on the drive and which code is in the machine, the buffer is much shorter.

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#3 has the big buffer

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Damn, this is a black hole. hahaha So… is DoP just as good as raw DSD via i2s? Is DSD streamed the same as DSD off a spinning disk? I saw Paul’s video talking about clocks, but I’ve watched so many now, I can’t remember if he was referring to the older PWT and PCM data.

Start here RE: The DMP -

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See here RE: DoP -

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Thank you!

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If you can afford to swim in the DMP or PST lane (new or used), I don’t think you should worry about the PWT.

It’s a fine player but the former are closer to the state of the art.

I don’t think I can afford it, but somehow I have become addicted. Better this than drugs right? Drugs might be cheaper.


Certainly give us a call if you are eying the new PST. If you have something to trade, specially if its MSRP was pretty high, we’re always able to you some good pricing.

Thank you jamesh! I am still doing some research and trying to justify this to myself, but will be in contact if the PST is the route I end up taking.

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related question regarding PST. it will not play the DSD layer on a sony classical disc. Yo-Yo Ma recording Bach’s cello suites. have not had this problem with any other SACD or DSD discs. suggestions?