Network optimization for serious streamers


In my ongoing experiments, now going on seven years, with network optimization for streaming I've discovered a number of optimizations that should work with any ethernet ISP.

 

I've tried a variety of ethernet cables, modems, routers, switches, FMC, ethernet filters, the following is what I've found to be most effective optimizations.

 

I'll start with ISP quality and speed. Recently I discovered 500mbps to be preferable to 300mbps. Along with upgrade in speed, modem capable of 1gb service replaced 600mbps, both have Broadcom chips and powered by same lps. Can't say which more responsible for improvement, speed or modem, presume speed has at least some role in ping time. As for ISP, there is importance in ISP server geographic location to you, shorter distances  means lower ping time. For information as to how ping time affects jitter-https://www.fusionconnect.com/speed-test-plus/ping-jitter-test

 

Now for modems,  modem close to audio system is most favorable, extending coax cable preferable to long ethernet cable. Coax more resistant to rfi and closer positioning to system means one can more easily afford top quality ethernet cable for modem to router connection. The modem should use Broadcom chipset vs. inferior Intel Puma, Broadcom chipset has lower jitter vs the Intel. Modem should be powered via external lps using quality DC and AC cables, lps to power conditioner for ultimate performance.

 

Following close positioning of modem to audio system, router should also be placed near modem in service of same advantage of making highest quality ethernet cable more affordable, in this case, modem to router and router to switches, streamers and NAS. Router should be powered with lps, this lps should be able to provide more amps than router requires in service of providing greater reliability, having lps with reserves of amperage means lps runs cooler, heat is enemy of reliability, longevity. As with modem, quality dc, ac cables and connection to power conditioner.

 

The next finding is new to me, provides very meaningful upgrade to streaming sound quality. Noise from wifi, injected both internally to router and externally with routers sitting close to audio systems has long been a concern to me. I have quality Trifield meter which measures rfi, router with operational wifi manufacture obscenely high levels of rfi, rfi is noise, noise is enemy of streaming at level we're talking about here. And its very likely the more wifi devices one has in home the higher the levels of rfi produced. This noise is then injected into following cables and streaming equipment. One may convince themselves FMC totally isolates this noise, and while correct, it doesn't mitigate the noise and masking going on within router. The only way to eliminate this noise is turning off wifi. And then, how to provide wifi for the many  wifi devices we have at home? The answer is to connect a second router to the primary router. The primary router will only provide ethernet for streamers, switches and/or NAS in audio system, also for the second router.  Second router provides wifi for the home, this scheme keeps vast majority of rfi out of audio system streaming chain. My own measurements find rfi significantly diminished in primary router, more than mulitiples of ten times lower vs wifi enabled. This was seamless install with the Netgear routers I'm using. There may also be value in provisioning higher quality routers. My new primary router, Netgear XR1000 is marketed as a gamer router, claims of lower ping time, latency, jitter vs other routers. Since my old router, Netgear RS7000 didn't have means to monitor ping time I can't provide evidence of this claim. Whatever the case, my XR1000 ping time test measurements are as follows, 25.35ms highest, 16.50ms lowest, this is A+ measurements against objective criteria. Ping time under load is download 25.93ms, upload 37.34ms, idle 17.31ms, this rates as A. My speed of 565gbps rates B grade, likely need 1gb service to get A here. At to how this all pertains to sound quality, adding up the upgrade in ISP speed and the off loading of wifi is without a doubt one of the most substantial, if not most substantial network upgrades I've experienced. While I  long considered my setup as having a vanishing low noise floor, with this setup I heard a new level of vanishing if such a thing is possible. Even more astounding was a more analog like presentation, while I wasn't aware of even the slightest digital presentation prior, this upgrade certainly exposed it was indeed there. It seems logical to conclude there has been some lowering of jitter here.

 

And then we come to the ethernet filter. I suppose audiophile switches can be considered as one, then we have actual filters such as Network Acoustics Muon, my JCAT Net XE and others. I continue to believe these necessary even with the all measures above.

 

Optical conversion is also valid approach post router. While I found generic FMC somewhat effective, at this point I prefer ethernet. On the other hand I've not yet tried optimizing a fiber solution, for example two Sonore OpticalModules, both powered by lps, further upgraded with Finisar optical transceivers.

 

Assuming one has high resolving audio and streaming systems the above network optimizations should provide for substantial sound quality improvements. In my system, perception of performers in room has been taken to a new level of intimacy, meaning a more emotional connection to the performers and performance.

 

At this point, I consider network has been fully optimized, the only upgrade I'm aware of would be ISP upgrade to 1gb.

sns

@classdstreamer The notion that an internet connection (and everything connected to it) is potentially a source of electronic noise is a possible way to explain audible differences some people report when they experiment with fiber, power supplies, cabling, and other bespoke networking devices.

However, I cannot understand how network latency and jitter (again at reasonable levels) upstream of a streamer’s buffering could affect anything.

FWIW, I use a direct fiber connection to my streamer (from a relatively inexpensive switch with an sfp slot). While my results weren’t as dramatic as what you report, it remains.

@yyzsantabarbara I've never used the Etherregen so have no opinion. I will soon be experimenting with Finisar FTLX1475D33BTL optical transceivers in OpticalModule and Optical Rendu. Again, measure lower in jitter vs garden variety transceivers. These seem hard to get these days, most outlets have no stock. The few that do are charging arm and leg, I've seen $300 apiece . I came by these and custom build Owens Corning optical cable at After Dark. I'll be experimenting with these downstream side of my custom build streamer. Based on research I've undertaken, these transceivers will work with SGC equipment. Seem to remember someone trying with EtherRegen, can't recall outcome, also questionable if it would work with your dac.

 

In general terms I can't say improvements I'm hearing are mostly jitter or lower noise floor. Most noticeable improvement has been lower noise floor with these optimizations. I'm assuming jitter is issue based on more analog like sound quality I've attained. Ed Meitner of EMM  claims jitter heard as smaller sound stage and more nervous quality, or what most interpret as digititus. A large measure of improvement in digital components has been due to ever increasing immunity to jitter. The question is at what level does jitter cease to be perceived by humans. Are excellent or A+ grades for ping time as good as its gets, or are there perceptible differences within these grading levels?

 

@classdstreamer I'm aware of the Ubiquity products, some claim using them in series provides even greater benefits. I do have an enterprise level router sans wifi in house, MikroTik CCR1036=8G-2S. integrating this into system will come in time.

 

No doubt fiber may be good solution, I've preferred ethernet over fiber pre server, fiber post streamer. This preference has continued, whether this is due to superiority of usb rendering via OpticalRendu vs motherboard usb in streamer is the question. When I install JCAT usb XE in streamer I'll determine whether any optical remains in my setup.

 

Again, all the above upgrades can be done with little financial outlay vs. the huge amount some of us spend on streamers, dacs, rest of system. People can determine for themselves whether these upgrades effective or not. The consumer grade products are both less costly and simpler for those without great knowledge of networking, good place to start.

@sns Thanks for posting your thoughts and impressions of your ongoing network optimizations. Improving the network pre-server is a task I will be handling once my DIY server is complete. The great variety of streaming setups out there makes finding a unified reference difficult. Many people find UTP into the server preferable to fiber into the server. Fiber pre-router/switch is more agreed upon as netting positive results.

To complicate things on my end, Taiko has made their network card available to non-Extreme owners. This presents another option vs the Startech or Xilinx network cards I am considering.

If I had fiber ISP I'd at least try optimized fiber setup pre streamer vs ethernet conversion, who knows what my new Finisar transceivers bring to the table.

 

@bruce19 Missed your post on ambient noise levels. And yes, this has long been concern of mine, even started thread on this some time ago. I only listen evenings when ambient noise levels lower vs day, besides I have other activities for daytime. Anyway, daytime ambient noise levels are typically in 40 to 50db, at night they more typically in 30's, can drop down as low as high 20's. I turn off most noise makers in house, including refrigerator, kitchen adjoins listening room, storm windows down in winter, little traffic or wind noise outside is prime. So yeah, ambient noise level is absolutely critical for detecting lowest noise floors from our audio systems!

 

Also, for those attempting the two router setup, my original router which became my secondary router was already set up for network access, therefore, when used as secondary or whole house wifi router, all my wifi devices still saw that network connection point, manually clicked on it, voila, instant internet access. Believe I had to reboot some devices. Also to eliminate IP address conflicts I reserved/assigned IP addresses to my audio network devices, therefore, streamer, NAS and Sonore OpticalRendu, also this for my RS7000 or secondary router.

 

I understand there has been some conversation about jitter and it's impact on networks and/or our ability to hear it. I will have to admit that some part of what I'm hearing as more analog presentation may be due in part to burn in of various devices and parts more recently installed. This includes Duelund Cast coupling caps in 300B amps, JCAT Optimo S ATX linear power supply for custom streamer, tons of parts to burn in for 3 rail, 30amp capable power supply, and perhaps to lesser extent, the OpticalModule. No doubt some of the blooming lends itself to perception of more analog like presentation. Still, I hear and have heard improvements in flow and timing over the years with  network upgrades, so this implies jitter may impact sound quality.

Is it preferable to have 2 switches in the chain? For example I have my Spectrum Modem connected to a Linksys router then connected to a cheap 5 port Switch. The Cat 8 ethernet cable is 35 feet long and connects to another LHY high quality switch which I have a good .5 meter silver Ethernet cable connected to my Enos filter connected to the streamer. I could go back and directly connect the long run ethernet cable directly to a port on the Linksys router and eliminate the first switch for streaming. Would that be a benefit? (I know I can try it myself, just asking)

 

BTW, my upstairs Apple Air Port router is connected to the cheap switch to run the upstairs PC, TV, HT stuff. So my dedicated 2 channel listening room has it's own dedicated connection as stated.