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Xrobbo

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  1. Hi Phil, even after having followed the instructions above, HQP won't start if I am in core mode, whereas I had no problems till the 3.13 version. A window opens saying that the library api-ms-win-crt-runtime-l1-1-0.dll is missing. If I install it manually it then asks me for another library, etc. Any idea how to solve this? I've also updated AO to the latest 2.1 version.
  2. I guess I found the answer in the dac's manual, where it is written: For an Input Sampling Frequency of 88.2kHz or above, under the Classic DAC, only Bit-Perfect I is available. This is because the specialanalogue filter under Bit-Perfect II is not required for these higher sampling frequencies. However, for the best sound from sampling frequencies of88.2kHz or higher, we recommend the use of the HD DAC or just press the “AMR” button for the optimal playback configuration.
  3. Thanks. Which means that if I upsample with a player like HQplayer (or others) than I will not be able to use the r2r conversion chip but automatically the signal will be sent to the other, right? I was asking because dacs like the Aqua La Scala MkII have a non oversampling technology with no digital filters (see specs here LA SCALA MKII precision R2R dac DFD decoder) and it seems they are a better match with transports like HQP who give their best in the upsampling mode. Just wanted to be sure I understand the logics behind that, SQ is of course another issue, and the most important one.
  4. Thank you Steven. Another question, more theoretical. Do I get it right if I say that of the 2 conversion systems in the dp-777 one is a non oversampling r2r with no digital filter whatsoever and the other is a delta sigma with oversampling and a choice of several filters? Yet both can take 24/192 signals as input? Or am I getting something wrong?
  5. Hi, the question has partially been asked but not answered: does anyone know whether upgrading the dp-777 will deliver a machine that is EXACTLY like the currently sold SE? I'm asking because among the upgrades they describe thus: ""Completely re-designed 4-layer gold-plated circuits boards)". It would seem that achieving such an upgrade would require replacing all the PCM, which means most of the internal circuitry. Do they really do all that changes when you send your 777 back?
  6. I contacted Lampizator a few days ago to inquire about the Euforia and specifically about the design differences with the L4 and above. Here what Lukasz Fikus has written me: "in Euforia the whole circuit of analog tube stage and all PSU is on one PCB. You do get tube rectification but it is the small in-directly heated 6X5 type.In L4 you get big 5U4 rectifier (directly heated) and there is a choke filter CLC (in Euforia it is CRC. In L4 the PSU caps are polypropylene foil caps, in Euforia - electrolytics. In L4 the circuit is on PCB but separated from the PSU. The transformer has 2 x bigger core in L4 The digital section has the same circuit. The output caps are made from tin in Euforia and copper / Wax/Paper in L4. The tubes in Euforia are usually no frills Tesla ecc88 while in L4 we use more exotic western equivalents like ecc82 Philips NOS JAN (USA) Both units have very similar sound but L4 is more refines and liquid" Wondering if someone has compared the Euforia with other Lampis and have some comment to share.
  7. Let me then ask the question in the reverse direction: what conditions grant that the same power connection is NOT shared? Does an auto-transformer or isolator transformed before the audio gear solve the problem? Or maybe an isolator transformer (not sure this is the right english word though) between the noisy gear and the main power line? Because AFIK a modern apt may be full of these SMPS, and isolating each one may be just impossible. On the other hand, if we are simply talking of RF noise, then I guess that a good quality power conditioner or hifi filter should do the job. For example, if SMPS related to pc, switch, router, nas, etc could be plugged into a surge protector like this Belkin Pure AV Home Cinema di protezione contro le sovratensioni 6: Amazon.it: Elettronica then all the noise produced by the SMPS should be stopped before entering the main electrical line. Are there theoretical and/or empirical objection to this hypothesis?
  8. Hi Jabbr, can you elaborate on that? I'm setting up an optical network which requires inevitably a lot of power supplies. I thought taking care of the PS of the optical converter close to the NAA (and maybe that of the optical switch) would have been enough, especially if the whole stereo gear has its own dedicated electrical line and is filtered through a power conditioner. Now, you seem to imply that even in this conditions SPS before the optical switch may affect sound through ground. Is that correct? But then what is the difference between the noise introduced by a router or an optical converter optically uncoupled and that introduced by another SPS that may appear to be in the same apartment?
  9. Hi there, after having read through this and other related threads I've decided to try the fiber way too on my SQP + NAA system. I was considering purchasing the optical switch several of you have suggested (http://www.aliexpress.com/item/8-9-ports-Gigabit-Ethernet-Optical-Fiber-Switch-with-eight-SFP-ports/32289862298.html) and run it in single mode. However, someone has alerted me to the fact that not all SFP modules may be compatible with this (or other) switch. Can you please advise on that point? I thought it would be enough that the SFP module is a 1000Base-LX LC-LC. Should I look also to other specs? Thanks for your help and congratulation for the super interesting experience you are conducting!
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