canoosa

If you follow those additional threads, you'll be presented with a considerable number of pictures to aid in visualizing the end results. I had intended on keeping a pictorial record for my own use, although I don't know if I'd be adding anything new to the available pool of info, will see.....difficulty here is that my normal work week is ~ 60hr, so the process is easily interrupted and/or delayed by unforeseen circumstances. B C N U?, Ingo

Hi 4est, I'm glad the clocks have all been identified. The buss = 10MHz; two masters = 45 & 49 MHz. IOW, a large amount of radiated freqs from this single source!! Actually had to pull the card (again) and use a magnifying glass to decipher the ident of the buss oscillator, followed by an eye-loop to confirm what I saw; worth the effort though, I think, if I get anywhere even close to what I'm intending to accomplish. Thank you for your valuable input! Cheers, Ingo

Sorry YashN, in the excitement I overlooked your question - and in the meantime, have learned there are actually 3 oscillators on that board!!! Yes, to answer your question. Insofar as the FPGA has no specific DAC function, I feel quite safe applying the AVM to the powerful radiators, and additionally will apply at least 2mm (probably 3mm) of absorber sheet to the specific "clocks", THEN encase the entire card in a "cage" of absorber material overlaid with copper mesh and mu-metal (to keep the low freq., created during music playback, from leaking through the rather airy computer case onto the sound card). If you go back to that Jplay forum and enter a search for "The Battle Against Harshness", you should bring up two additional threads, all three of which provide a surfeit of info that requires parsing due to the overlap, but you'll end up with an excellent "treatment" (pardon the pun) of the theme. Good Luck and All The Best, Ingo

Thank you Eloise (I've always wanted to thank you for ALL your helpful contribution on CA, I know I've benefited!) for your help. In the meantime I've learnt about the Spartan FPGA and what is does (or not) do. The last piece of the puzzle (clock) having been exposed, I think this brings the issue to a close - it's actually the last one, having procured all the requisite materiel and info as well (now). And so, on to the hard part........damn the torpedoes, full speed ahead! Best Regards, Ingo

Many thanks to you, 4est, for clarifying the clock issue -that's super, the clock being the worst of all the radiating components, or so they are adjudged.

I agree with the "worst possible environment...inside a PC" - as for the distribution panel, that is just the start of the chain although, if one didn't wish to tackle the task of doing the work inside the PC, then the resultant benefit of damping the distribution panel is sufficiently large to justify that cost. BUT......inside an apartment building, simple logic would dictate this to be a lost cause, methinks.

Hi YashN, The "Service Panel" is the "box" that holds the circuit breakers and into which is led the electrical power coming from outside the house via "Service Conductors" through the "Service Entrance". Absorbing the emissions coming from the (aka, informal) Electrical Panel by means of EMI absorbers is VERY worthwhile, even if nothing else is done. Cheers, Ingo

Hi YashN, Mostly following the input on JPlay forum dealing with EMI/RFI radiation, all of which entails a fair degree of work to both absorb or shield (according to what is required) everything inside the server, including the sound card, of course. What I've done to the service panel box re absorption has made a noticeably significant improvement to playback quality - and I haven't yet started on the server!! However, that's a different topic altogether. If you're curious, check out the Jplay.eu/forum "Computer Audio" section to search for "The Battle Against Harshness", as a start: the battle against Harshness - Computer Audio - JPLAY - hi-end audio player for Windows Regards, Ingo

Thanks for the help so far. Jabs1542 - there is nothing on the back of the card apart from the traces connecting components, etc. I do have a shot of the back but don't think it contributes anything worthwhile.

Greetings All, In an effort to deal with potent sources of radiation (within a music server) and their deleterious effect on sound reproduction, it would help to know the precise location of the "ususal suspects" on my Lynx AES16 card. To that end, can anyone point out the following, using the picture of the card as reference? 1) the VRM 2) the DAC 3) any Switching Regulators 4) a discrete CLOCK (though I doubt there is one on here). And in case someone is wondering: Yes, I did contact Lynx, asked for a schematic, and was told they don't hand out schematics, but would answer any questions; fair enough. So, sent the same picture you have here, but then Lynx refused to answer altogether, and I have no idea why; am guessing this is "classified"?? Anyway, am stuck, 's why I'm asking if someone here might actually know; any and all help is appreciated. Regards, Ingo

Greetings All, My first post! My biggest problem to date in measuring a highly unusual room is finding a good, basic, reliable audio interface. Began with an XTZ ROOM ANALYZER PRO II and wanted to continue with REW and ARTA software in order to take advantage of their features; bought a DAYTON EMM-6 and used it with the XTZ audio interface to continue with the analysis but wasn't quite convinced as to the propriety of that approach, i.e. thinking it might be more appropriate to invest in an "un-dedicated" interface, rather than trusting the XTZ interface to provide uninfluenced data. BUT, am not even sure if that is a valid basis for concern! Nevertheless, since I require a USB interface, purchased an M-AUDIO FAST TRACK (not the PRO version) based on its soundcard's reputation, and because that unit was posited as a possible, inexpensive interface (according to specs) on What's Best Forum. It turned out to be quite junky: with the EMM-6, the variance was 69dB!!!!, whereas the XTZ interface brought that down to 6dB. So, up the ante and began to look at units in the $150 range, but for one reason or another can't find an acceptable, reliable USB interface in that range either; e.g., STEINBERG's UR-22 will not accept REW or ARTA!!, and so forth. Elsdude, I do not wish to divert the thread with this particular question, but can't find an appropriate post among the plethora of wonderful discussions at CA wherein I can do so. The system in this cathedral-ceiling log-house room: balanced TOROID transformer - MUSIC VAULT DIAMOND server - ANTELOPE ZODIAC GOLD + VOLTIKUS - FOCAL SM9's. If there is a better place for this question, please feel free to re-direct.