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acoustic research scientist

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This is a drive-by post ... life has been extraordinarily crazy for the last three weeks ... May 2, 2021

atomicbob was last seen:
May 15, 2021 at 10:52 PM
    1. atomicbob
      Had an electrifying experience yesterday - 200J shock to abort a dangerously deteriorating cardiac rhythm. Oh My!
      1. View previous comments...
      2. Wilson
        Take care!
        May 18, 2017
      3. atomicbob
        Thank-you all. Things are getting better but some changes in cardiac meds will occur. Living and aging is a dynamic process. Good musical experiences certainly help to enjoy the ride.
        May 18, 2017
        ButtUglyJeff, Wilson, brencho and 2 others like this.
      4. bazelio
        Best wishes, ab!
        May 19, 2017
    2. atomicbob
      A corporate project will be keeping me very busy into July.
      1. Enigmatic
        Take care, GLHF, and remember to visit us! On the other hand I am aiming to resign on July... heh.
        May 5, 2017
        atomicbob likes this.
      2. atomicbob
        There are days like yesterday where I felt ready to call it a day as well.
        May 16, 2017
    3. atomicbob
      Reflecting upon all learned from yesterday's experiments. Now it's back corporate tasks for the rest of the week.
      1. bazelio, TRex, Azteca and 3 others like this.
      2. ultrabike
        Thanks for your contributions @atomicbob. I really appreciate it.
        Apr 4, 2017
        Dino likes this.
      3. Dino
        I've been enjoying reading the results and discussion, even though I don't really understand them. :)
        Apr 4, 2017
        bazelio, JayC and Wilson like this.
      4. atomicbob
        appreciate the feedback. some of these experiments are particularly time consuming.
        Apr 7, 2017
        bazelio, Dino and ultrabike like this.
    4. atomicbob
      Off to celebrate birthdays with 97 yo Mom and do some IT on her computer. She is a linux user at 97 trips around the sun.
      1. sorrodje
        My father is 80 yo and Linux user as well. :)
        Mar 31, 2017
        Riotvan and atomicbob like this.
      2. Riotvan
        Good stuff, much less support calls when putting family on Linux. Which distro do you guys use? I set them up with elementaryos, really simple, clean and stable. Bit of an apple ripoff but who cares...
        Mar 31, 2017
        atomicbob likes this.
      3. atomicbob
        I used the ubuntu distro for my mother. She doesn't really notice much difference in her use of office tools and internet browser other than not as annoyed by "updates" and constant visual changes present in the windoz world.
        Apr 7, 2017
        Riotvan likes this.
    5. atomicbob
      Note to self. Not so young anymore. Don't attempt a detailed technical posting after a 14 hr corporate day. Will have to rework that one.
      1. Cryptowolf, Azteca, Wilson and 2 others like this.
    6. atomicbob
      Contemplating what I will learn today and how that may benefit others as well as myself.
      1. Garns, Vansen, Grahad2 and 9 others like this.
    7. miceblue
      Hey there atomicbob! I hope all is well for you and that work is treating you nicely. I have a favor to ask of you. There's a fellow I'm in contact with on YouTube and he's working on a machine learning sound localization project. Would you mind checking out your Head-Fi PMs? Many thanks.
    8. atomicbob
      Taking each day as it comes and appreciating it for the gift it presents.
      1. Dino, Changeling, aufmerksam and 15 others like this.
      2. zonto
        Nice wordplay at the end!
        Jan 24, 2017
        aufmerksam and atomicbob like this.
    9. atomicbob
      Still alive, though in a limited capacity to participate in forums for the near future.
      1. recarcar, TMoney, JK47 and 4 others like this.
      2. View previous comments...
      3. ultrabike
        Hope to see more of you around here AB.
        Aug 25, 2016
      4. atomicbob
        After the cardiac procedure I had an 8 week run-in with viral pneumonia and viral bronchitis. It took through middle of Jan 2017 to feel fully recovered. Still tired often but when the happy collision of light corporate responsibilities and feeling energetic occur, things like Saga measurements happen. Thank-you all for the kind thoughts.
        Jan 24, 2017
        Cryptowolf and ultrabike like this.
      5. Kattefjaes
        Great to hear that you're feeling more yourself after all that. I hope that you also measure better now in tests now, too.
        Jan 24, 2017
    10. BioniclePhile
      You've been away for ages, we miss ya! Or at least I do. Bring back the data!
      1. Merrick and velvetx like this.
      2. atomicbob
        health issues and corporate overload took a toll the last 8 months. A cardiac procedure and completion of a 4 yr project will improve my opportunity to contribute. See the MoMB technical data as an example. Will be limited by health recovery though.
        Aug 25, 2016
        BioniclePhile likes this.
    11. atomicbob
      the usual - confused and in transition
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  • About

    On planet
    acoustic research scientist
    Gear List:
    See about section for my opinions
    My enjoyment of particular recreational music systems is inextricably intertwined with my personal preferences. The following lists are representations of my tastes in music, components and listening levels. The section on music is only a sample of my library but should provide sufficient insight into my musical preferences. I am rigorous and exacting with component measurements. That doesn’t automatically make my opinions worth anything without context. Use the following information to decide how well your own preferences converge or diverge with mine when I make comments about equipment in the forum. DO NOT blindly assume a positive comment from me about some component or headphone will automatically translate to auditory happiness on your part. Likewise you may find yourself enjoying something that I don’t. Consider (learning) your own personal preference.

    50s, 60s & 70s jazz
    Louis Armstrong, Charles Mingus, Thelonious Monk, Sonny Rollins, Miles Davis, Duke Ellington, Cannonball Adderly, Les McCann & Eddie Harris
    Recorded by Columbia (Frank Laico, Fred Plaut), Bluenote (Rudy Van Gelder), Contemporary Records (Roy DuNann)

    More recent jazz artists
    Wynton Marsalis
    Dave Grusin
    Dave Brubeck
    Bela Fleck
    Chick Corea
    Christian McBride
    Wycliffe Gordon
    Ingrid Jensen
    Steve Treseler
    Terell Stafford
    Ronnie Earl
    Steve Gadd Band
    Charlie Haden
    Brad Mehldau

    Medeski, Martin & Wood
    Medeski, Scofield, Martin & Wood
    Ill Considered
    Snarky Puppy
    Pat Metheny

    Artfully deviant
    Steve’n’Seagulls - Thunderstruck
    Two Cellos - Thunderstruck

    A class by himself

    60s & 70s rock
    Emerson Lake & Palmer
    Blood Sweat & Tears
    Pink Floyd
    Jethro Tull
    JJ Cale
    Little Feat
    Dave Matthews Band
    Cat Steven – Tea for the Tillerman
    Grateful Dead
    Lead Zeppelin

    Tangerine Dream
    Bruce Becvar
    Gary Stroutsos

    Classical composers

    Canadian Brass

    Listening Levels dBSPL
    60~70 quiet, background listening
    70~80 recreational and critical listening
    80~90 rocking out, often with libations at hand
    90~100 Santana Black Magic Woman / Gypsy Queen, ELP Tank - drum solo

    I tend to listen at quieter levels where electroacoustic transducers exhibit greater linearity. Higher levels are more likely to have greater distortion and require higher power amplification. The result is substantial deviation in opinions by listeners attempting to compare headphones when they are listening at different levels.

    Holo Audio KTE Spring2
    Schiit Bifrost2
    Matrix Audio X-Sabre Pro
    Lavry DA11

    Schiit Yggdrasil A2
    Schiit Gungnir MB A2
    Soekris 1421

    Work (recording, editing, acoustic measurements)
    Lavry DA11, AD11
    RME ADI-2 Pro

    Rather not listen
    Auralec Vega
    Resonessence Labs Concero
    Topping D30
    Objective DAC

    Universal Turd
    Audio-gd S19

    Eddie Current Zana Deux SE
    ECP Audio DSHA-3F
    ECP Audio T4
    Shortest Way 51+
    Cavalli Liquid Crimson

    Cavalli Liquid Platinum
    Schiit Lyr3 with PSVane 6SN7
    EC ZDT Jr after hum reduction modifications
    BottleHead Crack (PS modified, no speedball, e80cc driver)
    Cavalli MCTH
    Schiit Magni3+
    Schiit Vali2 with 6CG7
    Project Sunrise with 12BH7 and Linear Power Supply

    Rather not listen
    Objective 2
    Topping anything


    Sennheiser HD800-Jmod
    Focal Stellia
    Sennheiser HD600

    Sennheiser HD650
    Focal Clear
    HiFiMan HE-500

    Rather not listen
    Most anything planar except for the HE-500

    I developed a VST chain dubbed Immersion Virtualization System which I employ for my recreational listening. This has a substantial influence on my perception of component performance. See the IVS descriptions in the following links:




    Organizing chaos for nearly seven decades.