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Erik Haas

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    Amish Country, USA

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  1. Looking for some clarification.. if I’m using Audiolense and pulling sweeps @ 96khz does it make sense to create filters at rates higher than this? I have been generating filters @ 352.8khz but not sure if it’s worth doing so.
  2. Which variant is preferred, has there been any multi channel benchmarking between the two? I’ve also read these chips have a weird trait of slowing memory speeds when adding more than two sticks of memory. that being said I’m assuming 64gb ram is plenty? (2x32gb)
  3. Merging Hapi with it's premium ADC card.. I believe the Anubis can do this as well with the same quality. I'm actually running my vinyl rig through my Hapi less a Phono stage and actually sounds better than my McIntosh Phono stage.
  4. Hello Everyone, I'm finally getting around to upgrading my current HQPlayer machine ( 2012 Mac Mini) but still confused on the direction I should go with the build. Objective : Up sampling PCM formats (as low as 16/44.1) to 256DSD Channels to up sample : 5 pipeline channels using convolution 65k taps DAC: Merging Hapi via Ravenna From what I've been reading most everyone is using a traditional 2 channel system which is fine but this is where I get confused because I'm doing a multichannel pipeline for my active xo horn speakers. It seems like the recommendation is 2 cores per channel PLUS a GPU or 4 cores per channel. Right now this is how I am leaning: 1. AMD 7950x + 3090 (or) 4090 GPU 2. AMD 7050x 3D + 3090 (or) 4090 GPU 3. AMD 7960/70x Threadripper 4. Mac Studio M2 Ultra - this option is at the bottom of the list because I dont want to use bootcamp for Audiolense and I believe Jussi mentioned something about Macs not being able to process DSD correctly? (and merging still has yet to certify the M2 Ultra units) ( Should I consider a Intel processor though I'm not sure if e-Core processors are recommended for multi channel?) Again, any guidance would be greatly appreciated.
  5. Nice!!! What CPU are you going to use? I’m still on the fence with a build… Right now Its between a Ryzen 7950x / 7950x3d with a 4090 GPU or a Threadripper 7970x. I’m curious to know if the Threadripper 7970x is up to the task to do multi-channel / 65ktap convolution for 6 channels upsampling from PCM to DSD with out the help of a GPU...
  6. What did you end up building? I too have a Hapi and looking to build something that can handle multi-channel (5-6ch) w/ convolution upsampling to 256DSD
  7. Indeed it is…. Ive recently move my PC to another part of the house and have things hardwired to a Ubiquiti switch. No issues at all. Ive been keeping my eye out for a Artel Quarra switch for PTP clock improvements and isolation from the main network. So far the are hens teeth on the used market...
  8. @El Guapo thank you again for all this info and your patience with my questions. I have found myself diving deep in the PTP rabbit hole for the past few weeks and “think” I have a better understanding. please correct me if my understanding is incorrect. To improve the clock accuracy of a unit like the Hapi/Anubis via PTP the following are needed 1. PTP grandmaster clock. This may use GPS as the highest clock priority and May have a internal clock for back up 2. PTP Boundary Clock / Switch : this goes in between the GMC and your Slave Devices (Hapi/Anubis) and distributes the time corrected GMC. ( it basically measures and corrects the time stamp delays) There has been some recent confusion with Switches such as the Netgear M4250 being used to improve clocking. From my understanding that this device is a transparent clock meaning it only distributes the GMC signal to other boundary clocks and has no real effect on overall PTP accuracy in our use case. Outside of building what you did it seems like the following devices would be needed to implement a highly accurate PTP clocking system would require the following as an example: 1. Grandmaster Clock : Sonifex AVN-GMCS 2. Boundary Clock/Switch : Quarra PTP - 1G Compact 3. Merging Hapi/Anubis thank for letting think this out on the thread. Hopefully my understanding is correct.
  9. @AfterDark. this is very exciting news, thank you for developing this product! When it comes to using this switch as a grand master clock with the Hapi MK2 and Streaming computer as a slave. Does the streaming computer also need to be equipped with a network card that is PTP compatible?
  10. All Great info... I dove down the rabbit hole for a few weeks looking at stuff. Still not sure if it's advisable to look into PTP clocking or finding a Word Clock generator capable of doing fs x256 rates which i would assume would take care of 11.2mhz 256dsd rates. I remember reading that it's important to have a low phase / jitter clock when using clocking for audio. Does PTP clocking have the same low phase / jitter characteristics?
  11. Interesting. Though if using HQplayer and if Hapi is used as a master clock can the PTP clock add better clocking / audio quality to the Hapi? Then I also question, if youre running a separate PTP grand master clock, wouldnt you need to add a switch that is also PTP capitable to distribute the master lock signal to everything? I did some searching and it looks like Sonifex makes a pretty nice GM PTP clock which is also Ravenna certified. https://www.sonifex.co.uk/avn/avn-gmcs.shtml
  12. @El Guapo pretty interesting stuff.. I actually started looking into adding an external clock to my Hapi now that I have things integrated correctly but finding this is an entirely new rabbit hole! lol So how does a PTP Grandmaster clock differ from adding an external word clock ( with or without the addition of a master clock signal to the word clock) Since Hapi is running off PTP does that mean adding a wordclock is pointless?
  13. I 100% agree with your statement. I have had nothing but clocking issues when using my Mini DSP mic. Now that I can use my Earthworks mic again I'm a happy camper.
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