The ethernet phy is already transformer coupled.
Nice. 
There is growing suspicion the Ethernet transformers are not immune to the high frequency noise of router smps supplies⊠hence why FMC isolation is somewhat popular.
I recently upgraded to an ultrarendu and connected to my cable modem router and I got an extremely fatiguing sound out of my SGCD! Like ultrasonic something was there. Upon unplugging the coax from the router, noise went completely away. I previously couldnât listen happily for more than 15 min and couldnât turn up past 75 db. Iâm using a BJC cat6a with a floated shield so the noise shouldnât have travelled on the ground⊠it went straight thru the isolation transformer of the ultrarendu. I realize the coax probably introduced a ground loop⊠but if the transformer was 100%, this shouldnât matter.
I recently implemented 2 TP link FMCs and the noise is completely gone. Also, I can hear differences between the smps power supplies powering my receiving FMC that regenerates Ethernet from the optical.
Thanks! Iâll look into it.
Coax (comcast) -> N600 modem router -> Ethernet to URendu (router to Urendu) via BlueJeans 6a
Its a combo Cable modem router. If ethernet isolation is perfect via transformer then it shouldnât matter if you have a combo modem router, a switch, separate router, standard ethernet router⊠etc.
This was not a subtle effect, coax plugged in vs. unplugged. Iâm talking cymbals in your face completely forward to a level where you canât really hear the rest of the music vs. a nice natural soundstage and nice presentation where the speakers disappear.
Let me put it this way⊠I stopped listening to music for 1 week due to the sound until the FMCâs came in.
Is this the FMC you are referring to?
https://www.amazon.com/TP-Link-Ethernet-Converter-Single-Mode-MC110CS/dp/B0034CSUD0
Yes thatâs it the MC110. I use Corning fiber to connect them. Router and sending FMC are both powered on my common line in another power strip. Receiving FMC which sends Ethernet to Urendu has power supply on my Dectet in a separate zone from the SGCD.
cxp said Yes that's it the MC110. I use Corning fiber to connect them.Sounds like you're onto something there mate! A linear PSU may help with the receiving FMC :-)
One more post I promise and Iâll shut up or move to another thread.
Testing out two power supplies on my receiving FMC I hear significant differences between iFi SPMS vs. Jameco Linear wall wart. The Jameco is much smoother with more natural body and natural sibilant character while iFi overemphasizes sibilance and kills the breath of the voice. Bass is much improved with Jameco, more musical full and complete.
I mention here since power supplies on an Ethernet device should not matter because of the isolation transformers. Many others are observing this not to be true, even on this forum there are a bunch of FMC users.
It would be awesome if the streamer either had built in optical isolation similar to how these FMCâs work or if they could have an optical fiber input.
+1 on the optical fiber input. My ideal configuration would have optical fiber input, thereby isolating the streamer from the switch, and I2S to connect to the DAC. Iâm pretty sure the streamer will have I2S. I would also throw ethernet (direct connection to DAC, optimally) and USB connectivity for other DACs without I2S.
Cxp - Ur FMC/SGCD/BJC/Urendu/LPS, etc. rig is not nearly complicated enough ; )
badbeef saidCxp - Ur FMC/SGCD/BJC/Urendu/LPS, etc. rig is not nearly complicated enough ; )
Should I add in another switch after the FMC before going to the Urendu? And then a high-end linear supply?
No but seriously⊠Yes this is a bit complicated. Especially since the LPS1 has an energizing supply (Meanwell). I am testing out an Sbooster linear power supply for the Urendu since it has great reviews, has been reported to have better dynamics, and would eliminate the 2 piece nature of the LPS1+meanwell. So in essence I have 2 FMC units added and subtract one piece maybe 
Is there anyway the new server may include PCM to DSD conversion?.. For those of us who have a SGCD or other DACS?
I just tried PCM->DSD 128 in Audirvana and it sounds amazing on the the SGCD
Itâs not something weâve contemplated but will look into. Thanks for the suggestion!
Hi Paul
What is the order that the various versions will be released?
Are there two just the two versions planned for initial release?
1 Dedicated hardware box in DirectStream Chassis
- Bridge 3 card to plug into DS DSJr and PWD
thanks
magicknow
Hi Paul.
This product couldnât be better timed. Well, it could be if it was available now!
Iâve just purchased a DirectStream which Iâm collecting this Saturday. I was researching my the best way to get my music files served to it when I found this review:
It seems to this reviewer that the combination of the memory player into the DSD is one of the best digital sources heâs heard. It got me thinking I wanted the best for my new DSD as well but I donât want a third party server or the faff of setting up a computer based source. The PS Audio Server with Octave looks to be to be the answer.
Further research led me to this forum and this subject. I have read through all the pages with great interest and appreciate your passion to provide top quality products.
In the past my front end was a Naim unitiServe SSD and ND5XS streamer. Files were stored on my Synology NAS via the unitiServe when I ripped my CDâs. Naim prefers WAV as a format and for my own reasons as do I. The only problem is metadata. I planned to use my Mac mini and JRiver to play my music into my DSD. The interface will be my iPad with JRivers app. The problem with this is I can only search files by album and not artist because of the WAV files. My naim streamer allowed me to search by directory/folder. A basic way to navigate which worked fine for me back then.
A few questions:
-
Will the new server have a search by folder option or will the file location and how itâs accessed be based on metadata only?
-
As the DirectStream converts the files to DSD, is it no longer important (to some), whether their files are FLAC or WAV? What format will the PS Audio server rip CDâs into?
-
Once a CD was ripped using my unitiServe, I was able to access the file via The nServe app on my iPad and make changes to the Artist Name, Album Title (I like to add record label and cat. Noâs) and Track Titles. Could this feature be included in the Octave control app for iPad? It would be slicker to have this rather than having to fire up the computer and make tag changes that way!
Many thanks & best regards
Noticed that a prototype P20 is going to be on display at the Rocky Mountain Audio Show.
Wondered if a prototype of the music server is going to be on display as well?
Just a thought.
Bruce
bruces saidNoticed that a prototype P20 is going to be on display at the Rocky Mountain Audio Show.
Wondered if a prototype of the music server is going to be on display as well?
Just a thought.
Bruce
Nope. Not ready yet. Love to, butâŠ
79kage saidA few questions:
Will the new server have a search by folder option or will the file location and how itâs accessed be based on metadata only?
As the DirectStream converts the files to DSD, is it no longer important (to some), whether their files are FLAC or WAV? What format will the PS Audio server rip CDâs into?
Once a CD was ripped using my unitiServe, I was able to access the file via The nServe app on my iPad and make changes to the Artist Name, Album Title (I like to add record label and cat. Noâs) and Track Titles. Could this feature be included in the Octave control app for iPad? It would be slicker to have this rather than having to fire up the computer and make tag changes that way!
Many thanks & best regards
You will be able to search by metadata. So, search by artist, genre, composer, track title, etc.
The server will RIP files into what file type you choose. Weâre not yet ready to tackle that part of the server, but when we do, weâll have some good choices youâll appreciate. Need to focus on one area at a time. Presently weâre focused on navigation and getting everything to work.
You will have complete control over the metadata tagging through the Octave app.