Indholdsfortegnelse for July 2018 i Stereophile

THERE ARE AS MANY OPINIONS AS THERE ARE EXPERTS It’s not surprising that many people, like me, love nice cameras and good stereo gear. In my worse moments, I attribute this to mere consumerism: We love expensive stuff and the thrill of buying something new, whether for reproducing music or creating visual images. In my better moments, it’s clear to me that there’s more than that to this common taste for audio and photography, and more to the hobby of so-called perfectionist audio. One commonality: we like well-made machines. There’s beauty in finely wrought devices, whatever their intended use. We can’t claim artisanal credit—we didn’t make them—but there’s satisfaction in using them, pride in owning then, and real pleasure in collecting them. Of the visual arts, photography is the most…

ATTENTION ALL AUDIO SOCIETIES: We have a page on the Stereophile website dedicated solely to you: www.stereophile.com/audiophilesocieties. If you’d like to have your audio-society information posted on the site, e-mail Chris Vogel at info@XLinkAudio.com. Please note that it is inappropriate for a retailer to promote a new product line in “Calendar” unless this is associated with a seminar or similar event. CALIFORNIA ▪ Sunday, July 29, 1–4pm: The Los Angeles & Orange County Audio Society will hold its monthly meeting at Common Wave, in downtown Los Angeles. State-of-the-art systems will be presented, including the latest components from DeVore Fidelity, E.A.R., Kimber Kable, Marten, NAD, Nagra, Shunyata Research, and Totem Acoustic. Analog sources from Dr. Feickert Analogue, Koetsu, Kuzma, Rega Research, and Soundsmith will also be showcased. Manufacturers’ representatives will be…

Analog Source Linn Sondek LP12 turntable with Lingo power supply, Linn Ekos tonearm, Linn Arkiv B cartridge. Digital Sources NAD Masters Series M50.2, Roon Nucleus+ digital players; Ayre Acoustics C-5xeMP universal player; Ayre Acoustics QX-5, PS Audio PerfectWave DirectStream D/A converters; Ayre Acoustics QA-9 USB A/D converter. Preamplification Channel D Seta L phono preamplifier. Power Amplifiers Bricasti Design M15, Lamm Industries M1.2 Reference (monoblocks). Integrated Amplifiers Luxman L-509x, NAD Masters Series M32. Cables Digital: AudioQuest Coffee (USB) & Vodka (Ethernet), Canare (15’, AES/EBU), DH Labs (1m, AES/EBU), Esperanto Audio (S/PDIF). Interconnect: AudioQuest Wild Blue. Speaker: AudioQuest K2. AC: AudioQuest Dragon Source & High Current, manufacturers’ own. Accessories Target TT-5 equipment racks; Ayre Acoustics Myrtle Blocks; ASC Tube Traps, RPG Abffusor panels; Shunyata Research Dark Field cable elevators; Audio Power Industries…

I measured the AkitikA GT-102 using my Audio Precision SYS2722 system (see the January 2008 “As We See It”1). Before I test an amplifier, I precondition it with both channels driving a 1kHz tone at onethird power into 8 ohms for an hour. However, I ended the preconditioning of the AkitikA after 20 minutes, as the left side of its top panel, above the internal heatsinks, was hot, at 130.2°F (54.6°C), and the bottom panel was too hot to touch, at 169°F (76.6°C). The AkitikA doesn’t have sufficient heatsinking for sustained operation at this worst-case power level. The voltage gain at 1kHz into 8 ohms measured 26.15dB, an input of 140mV resulting in an output power of 1W into 8 ohms. The GT-102 preserved absolute polarity (ie, was non-inverting). Its…

Description Solid-state stereo power amplifier. Inputs: 1 unbalanced (RCA), 1 balanced (XLR). Outputs: 1 pair speaker binding posts. Power output: 125Wpc into 8 ohms, 250Wpc into 4 ohms, 500Wpc into 2 ohms (all dBW). Frequency response: 10Hz–150kHz, ±0.5dB. Gain: 27dB. Signal/noise: >85dB at full rated power. Input impedance: 100k ohms unbalanced, 200k ohms balanced. Output impedance: N/S. Power consumption: 60W standby, 2W idle. Dimensions 17" (430mm) W by 10.5" (265mm) H by 18" (455mm) D. Weight: 90 lb (40.8kg) net, 110 lb (49.9kg) shipping. Serial number of unit reviewed 1017. Price $18,000. Approximate number of dealers: 14. Warranty: 5 years, limited. Manufacturer Bricasti Design, Ltd., 2 Shaker Road, Building J100, Shirley, MA 01464. Tel: (978) 425-5199. Web: www.bricasti.com.…

I measured the BorderPatrol P21 EXD using my Audio Precision SYS2722 system (see the January 2008 “As We See It”1). I installed the numbered 300B tubes in the correct sockets, as identified in the manual, but I didn’t adjust the bias for the two pairs of 300B output tubes, feeling that I should measure the amplifier in the condition it was auditioned by Ken Micallef. The P21 EXD’s voltage gain at 1kHz into 8 ohms was lower than the norm, at 17dB from the 8 ohm tap into 8 ohms, 15.9dB from the 4 ohm tap into 8 ohms, and 14.5dB from the 4 ohm tap into 4 ohms. While performing this test, I could hear a relatively loud 1kHz tone coming from the amplifier. Investigating with a stethoscope revealed…

Praise it all you want, but digital audio is still my second choice: In a life in which the enjoyment of art is infinite but the hours in which to do so are limited, and given the choice between listening to LPs and 78s on the one hand or files and CDs on the other, digital is a waste of my time: It doesn’t connect me with the music as well as analog does, period. In my experience, digital audio isn’t evil, merely banal. But digital is getting better all the time, and part of my job description is to endure in meeting digital halfway, to give it a fresh chance every time out. But first I have to catalog and discard all of the defense mechanisms I’ve adopted without…

The sound of Steve Tibbetts’s guitar music is unique—one need hear only a measure or two of his new album to identify the distinct tang of his playing. Common wisdom is that a guitarist’s sound is in the hands and fingers, but Tibbetts has another trick: his weathered, 50-year-old Martin D12-20 12-string acoustic guitar. As Tibbetts was growing up, his father drove around Wisconsin teaching labor law. “When he’d break out his 12-string at a meeting of tired union Boot and Shoe workers in Stevens Point, everyone would perk up,” Tibbetts explained to me. “Guitar is an attention-getting device. They’d sing from the Joe Hill songbook, or whatever passed for an AFL songbook. “I came home from college some winter break around 1978 and saw the guitar in its case,…

Exit Stencil ESR-050 (LP). 1969/2018. TT: 38:47 The Second Damnation Exit Stencil ESR-051 (LP). 1970/2018. TT: 41:57 Both: Eric Stevens, prod.; Ken Hamann, eng.; Eliot Kissileff, remastering. AAA “You take your Technicolor daydream / Aww, let your mind and soul unwind / You walk a mile into a mirror / Yeah, travel sideways into time.” Thus begins “Cookbook,” track 1 of The Damnation of Adam Blessing, the eponymous 1969 debut of a Cleveland-based underground quintet who, despite being signed to then-legendary United Artists Records, ultimately failed to get much commercial traction beyond the Midwest touring circuit of the day, and split up in ’73. Damnation and 1970’s The Second Damnation remain crucial artifacts, and the ever-diligent archivists at Cleveland’s Exit Stencil Recordings have rescued both platters from relative obscurity in…

AkitikA GT-102 Editor: Thanks to Herb Reichert and John Atkinson for their positive, thorough, and insightful review of AkitikA’s GT-102 power amplifier. Perhaps they’d next like to review the PR-101 preamplifier? Dan Joffe AkitikA Bricasti Design M15 Editor: A review in Stereophile is very important to Bricasti Design and to our dealers and export partners, so we took our responsibilities in this matter very seriously. We did our best, in hopes that the process would be transparent and fair, and that Stereophile’s reviewer would report on the best that our product the M15 stereo amplifier can sound. We don’t think that is what happened, and are very disappointed. When Jason Victor Serinus approached us at the 2017 Rocky Mountain Audio Fest while we were demonstrating the M15, we told him…

FEEDBACK TO THE EDITOR The world is changing Editor: I saw Jason Victor Serinus’s review of the LG V30 smartphone in May (p.105). I think the phone is a remarkable achievement. Some credit must go to the China market’s current interest in high-performance audio in phones. I have been told that the China market’s appetite for premium audio has driven a lot of unexpected decisions around premium audio. Even Qualcomm has developed a high-end DAC for their Snapdragon platform. Synaptics, a company that has focused on touchpads for laptops, has introduced new chips for USB audio and headphones. It seems that market conditions will bring the public into higher-performance audio whether they want it or not (except Apple …). You can use the LG phone to drive USB audio devices.…

Description Three-way, four-driver, reflex-loaded, floorstanding loudspeaker. Drive-units: 1" (25mm) silk-dome tweeter, 7" (178mm) cellulose-fiber/paper pulpcone midrange, 8" (203mm) paper-cone woofer, 10" (254mm) paper-cone woofer. Crossover frequencies: not given. Frequency response: 19Hz–32kHz, ±3dB, room-averaged response. Sensitivity: 89dB/W/m. Impedance: 4 ohms nominal, 2.54 ohms minimum at 85Hz. Minimum amplifier power: 20Wpc. Dimensions 53" (1347mm) H by 15.25" (387.4mm) W by 22.875" (580mm) D. Weight: 260 lb (117.9kg). Finish Multiple automotive paint colors; custom options. Serial numbers of units reviewed 1457 (left), 1458 (right). Price $57,900/pair. Approximate number of dealers: 39. Manufacturer Wilson Audio Specialties, 2233 Mountain Vista Lane, Provo, UT 84606. Tel: (801) 377-2233. Fax: (801) 377-2282. Web: www.wilsonaudio.com.…

Analog Sources AMG Giro G9, Linn Sondek LP12 Valhalla turntables; SME M2-9 tonearm; AMG Teatro, EMT TSD 75, Koetsu Rosewood Standard cartridges. Digital Sources Mac mini computer running Audirvana 3.2; Border Patrol, Mytek HiFi Manhattan II, Schiit Audio Yggdrasil Analogue 2 DACs; Integra DPS-7.2 DVD player used as CD transport. Preamplification Auditorium 23, Bob’s Devices CineMag 1131, Dynavector SUP-200, My Sonic Lab Stage 1030 MC step-up transformers; Lounge Audio LCR Mk.III RIAA, Tavish Design Adagio phono preamplifiers; Linear Tube Audio microZOTL2.0, Pass Laboratories HPA-1, Rogue Audio RH-5 line-level preamplifiers. Power Amplifiers Bel Canto Design REF600M monoblocks, First Watt J2, Pass Laboratories XA25, PrimaLuna ProLogue Premium. Loudspeakers Falcon Acoustics LS3/5a, Harbeth P3ESR, Joseph Audio Pulsar, Magnepan .7, Tekton Impact Monitor. Cables Digital: AudioQuest Cinnamon (USB), Kimber Kable D60 Data Flex Studio…

I measured the Bricasti Design M15 using my Audio Precision SYS2722 system (see the January 2008 “As We See It”1). Before I test an amplifier, I precondition it with both channels driving a 1kHz tone at one-third power into 8 ohms for an hour. At the end of that time, the Bricasti’s top panel was warm, at 101°F (38.3°C), and its heatsinks were hotter, at 103.1°F (39.5°C). The M15 has sufficient heatsinking for its power rating. The voltage gain at 1kHz from the speaker terminals into 8 ohms measured 26.9dB for both balanced and unbalanced signals, and both sets of inputs preserved absolute polarity (ie, were non-inverting). The unbalanced input impedance was 88k ohms at 20Hz and 1kHz, decreasing at 20kHz to 34k ohms. The balanced input impedance was 170k…

Description Solid-state, class-AB integrated amplifier with Anthem Room Correction (ARC). Analog audio inputs: 4 unbalanced (RCA), 1 balanced (XLR), 2 phono (MC, MM). Digital audio inputs: 2 S/PDIF (RCA), 2 S/PDIF (TosLink), 1 USB, 1 AES/EBU (XLR). Preamplifier outputs: variable, fixed, subwoofer (all RCA). Communication (updates & control): USB, mini USB, Ethernet RJ-45, RS-232, IR in, 12V trigger out. Digital input sample rates: USB: PCM 32/384, DSD at 2.8MHz & 5.6MHz. HDMI & S/PDIF: PCM 24/192. Internal digital processing: 32/192. Power output (continuous, 20Hz–20kHz, <1% THD): 200Wpc into 8 ohms (23dBW), 400Wpc into 4 ohms (23dBW), 550Wpc into 2 ohms (21.5dBW). Signal/noise (1kHz, IEC-A, 2V RMS out): digital in, 44.1kHz, 112dB; analog in, DSP mode, 110dB; analog in, direct mode, 120dB. Phono input impedance: 47k ohms MM, 100 ohms MC.…

Analog Sources Kuzma Stabi S turntable & Stogi tonearm; Thorens TD 124 Mk.I turntable, Jelco 350S tonearm; Denon DL-103, Hana EL, Ortofon 2M Bronze cartridges. Digital Sources Apple MacBook computer running Audirvana Plus; LG BD550 BD player (as transport); Halide DAC HD, Mytek HiFi Manhattan, PS Audio NuWave DACs; Western Digital T2 Mirror Drives (2). Preamplification Auditorium 23 A23 moving-coil step-up transformer, Heed Audio Quasar phono preamplifier, Shindo Laboratory Allegro preamplifier. Power Amplifier Shindo Laboratory Haut-Brion. Integrated Amplifier Heed Audio Elixir. Loudspeakers DeVore Fidelity Orangutan O/93, Elac Debut B6, Quad S2, Klipsch Heresy III. Headphones Master & Dynamic MH40. Cables Interconnect: AudioQuest Chicago & Water & Yukon, DiMarzio M-Path, Morrow Audio MA-1, Shindo Laboratory, Triode Wire Labs American. Speaker: Audio-Quest Castle Rock, Auditorium 23, Tellurium Q Black, Triode Wire Labs…

When Jason Victor Serinus reviewed LG’s MQA-capable V30 smartphone8 in our May issue, he was mightily impressed. “LG’s implementation of its Hi-Fi Quad DAC is a work of genius,” he wrote, concluding that “If ever there were a device that could bring the experience of high-end sound to millions of music lovers, the hi-rez V30 with MQA is it. It’s more than a game-changer.” JVS added that the V30’s combination of audiophile sound quality and smartphone portability “may prove unbeatable.” However, our publishing schedule didn’t include enough time for Jason’s review to be accompanied by our usual evaluation of its measured performance. This Follow-Up corrects that omission. I measured the LG V30 DAC with my Audio Precision SYS2722 system (see the January 2008 “As We See It,” http://tinyurl.com/4ffpve4), using test-signal…

Murray Perahia, piano Deutsche Grammophon 479 8353 (CD, 24/96 download). 2018. Angelika Meissner, Maider Múgica, exec. prods.; Andreas Neubronner, prod.; Markus Heiland, Martin Nagorni, engs. DDD. TT: 55:39 Ever since he returned to the studio following a debilitating hand infection that first appeared in 1990, pianist Murray Perahia, now 71, has released a string of superb recordings. After recording the Bach works that he studied during his forced withdrawal from performance—cornerstones of his 21st-century discography—he’s returned to Beethoven, whose concertos and sonatas he began recording in the analog era. Remarkably, this is Perahia’s first recording of two of Beethoven’s bestknown sonatas, No.29, Op.106 (“Hammerklavier”), and No.14, Op.27 No.2 (“Moonlight”). Recorded in the woodlined Hall 1 of Berlin’s Funkhaus Nalepastrasse studio, they benefit from engineering that captures the fullness of Perahia’s…

Jagjaguwar JAG322 (LP/CD/WAV). 2018. Ruban Nielson, prod., eng.; Bob Ludwig, mastering. DDA/DDD? TT: 43:18 Ruban Nielson’s fourth album as Unknown Mortal Orchestra is his strangest and most alluring. Rather than returning to the Portland, Oregon, home studio where he created the critically acclaimed Multi-Love (2015), the New Zealand–American singer-songwriter sought inspiration in foreign places. Sex & Food was recorded in Seoul, Hanoi, Reykjavik, Mexico City, and Auckland, and features musicians from each of those cities’ nations, as well as Nielson’s frequent collaborators: Jacob Portrait, who plays a thick, soulful bass; and drummer Kody Nielson, who has mastered tightly loose timekeeping. To say that the listener is treated to the indigenous sounds of the countries in which this music was recorded would be a lie; nonetheless, one hears the soft, sweet…

I’m sitting in a rented Nissan just off Highway 61—yes, that Highway 61—looking out at a Shell station through the bug-stained windshield and across a litter-strewn, not-yet-planted cotton field. It’s late March, and I’ve just left Clarksdale, Mississippi, on my way to Memphis. Leaving Clarksdale made me thoughtful, so I’ve pulled over to jot down a few notes. Clarksdale—specifically, the intersection of highways 61 and 49, at the town’s southern edge—is the crossroads where, according to legend, Robert Johnson encountered the Devil and exchanged his soul for his legendary guitar chops. The list of musicians born in this small city (pop. 18,000) includes Sam Cooke, John Lee Hooker, Son House, and Ike Turner. Johnson lived here; so did W.C. Handy. Muddy Waters moved here as a child. As you drive…

SCHUBERT PIANO TRIO 2, NOTTURNO FOR PIANO & STRINGS Trio Alba Audiomax 9032013 (SACD/CD). I discovered the second movement of Schubert’s Piano Trio 2 in E-flat, D.929, in 1975, when it was used as a stately and insistent motif throughout the film Barry Lyndon. Director Stanley Kubrick said that the piece had “just the right restrained balance between the tragic and the romantic without getting into the headier stuff of later Romanticism.” Deeply affected by it, I ran from the theater and purchased a recording, though I no longer remember whose. The Trio has received dozens of recordings, and among the many I’ve collected are the classic reading by the Beaux Arts Trio (Philips) and lovely multichannel versions by the Storioni Trio (Pentatone) and Irnberger, Geringas, and Korstick (Gramola). This…

I used DRA Labs’ MLSSA system and a calibrated DPA 4006 microphone to measure the Wilson Alexia 2’s frequency response in the farfield, and an Earthworks QTC-40 for the nearfield and spatially averaged room responses. Because of the speaker’s weight, I was unable to raise it off the ground for the measurements, which reduced the resolution of the frequency-response graphs in the midrange. And as with the original Alexia, there was the problem of which axis to place the microphone on for the farfield measurements. I wanted to measure it at my standard 50" microphone distance, which is optimal for midrange resolution in the resultant graphs, even with the speaker sitting on the floor. So I drew a line from the tweeter to the position and 36" height of my…

Description Class-AB stereo power amplifier with LM3886 power-amplifier integrated circuit, regulated power supply with 10,000μF capacitance. Inputs: 1 pair single-ended (RCA). Outputs: 2 five-way speaker binding posts. Power output: 50Wpc into 8 ohms, nearly 100Wpc into 4 ohms. Frequency response: 5Hz–100kHz, –3dB. Input impedance: 51k ohms. Sensitivity: 1V RMS produces 20.59V RMS output. Slew rate (typical): 14V/μs. Damping factor at 1kHz ref. 8 ohms: >80. Signal/noise: typically 136dB below 50W into 8 ohms, A-weighted. Dimensions 15" (380mm) W by 4.5" (115mm) H by 10" (255mm) D. Weight: 15.5 lb (7kg). Finish Black. Serial number of unit reviewed None. Prices $314 kit, $488 fully assembled, both plus $26 for shipping within the lower 48. Approximate number of dealers: factory direct only. Warranty: Warranty: 1 year, parts. Manufacturer AkitikA, LLC. Web: www.akitika.com.…

Digital Sources dCS Paganini SACD/CD transport & Scarlatti clock & Rossini DAC; Intel NUC7i7BNH computer with 8GB RAM, 128GB SSD, running Roon; Linksys router with two TP-Link GB Ethernet media converters & multimode duplex fiber-optic cable; iPad Pro, external hard drives, USB sticks Preamplifier Lamm Industries L2.1. Power Amplifiers Dan D’Agostino Master Systems Progression monoblocks. Loudspeakers Wilson Audio Specialties Alexia 2. Cables Digital: AudioQuest Diamond (Ethernet), Nordost Odin 1 & Odin 2 & Valhalla 2 (USB), Wireworld Platinum Starlight Cat8 (Ethernet). Interconnect, Speaker, AC: Nordost Odin 2. Accessories Grand Prix Monaco rack & amp stands, 1.5" Formula platform; Nordost QX4, QK1 & QV2 AC power accessories; Synergistic Research Transporter & PowerCell; Isotek EVO3 Sigmas & Audience aR2p-TSSOX power conditioners, GreenWave filter; AudioQuest NRG Edison outlets; Nordost Sort Lifts (speaker cables);…

I measured the Anthem STR using my Audio Precision SYS2722 system (see the January 2008 “As We See It”1). Before I test an amplifier, I precondition it with both channels driving a 1kHz tone at one-third power into 8 ohms for an hour. This thermally stresses an amplifier with a conventional class-AB output stage. At the end of the hour, the top panel was a warm 95.4°F (35.3°C), but the exposed tops of the internal heatsinks were too hot to touch, at 150.6°F (65.9°C). Even so, the STR has sufficient heatsinking for its rated power. The analog inputs can be set either to be digitized at 32-bit/192kHz, in order to have the tone controls, crossover filtering, and Anthem Room Correction (ARC) available or to Analog Direct mode. With the Anthem’s…

Description Two-channel, tubed, power amplifier with external power supply. Tube complement: amplifier, two Sovtek 6C45PE, four 300B; power supply, two 6AU4-GTA, two EZ80. Line-level inputs: 2 (RCA). Outputs: 2 pairs each of 3 binding posts—ground, 8 ohm tap, 4 ohm tap. Output power: 20Wpc into 8 ohms (13dBW). Input sensitivity: 1.2V RMS to full output. Input impedance: 100k ohms. Channel balance: 0.5dB. Frequency response: 10Hz–36kHz, –3dB. Minimum load impedance: 3 ohms. Gain: 10dB. Power consumption: 300W. Dimensions Amplifier: 17" (430mm) W by 13.5" (340mm) H by 13.5" (340mm) D. Weight: 37.5 lb (17kg). Power supply: 8.7" (220mm) W by 6" (145mm) H by 14" (345mm) D. Weight: 35.2 lb (15.9kg). Finishes Ash, Cherry, Mahogany, Maple with metal top and bottom panels. Serial number of unit reviewed Demo P21. Price as…

JOSEPH AUDIO PULSAR LOUDSPEAKER Ever since loudspeaker designer Jeff Joseph, owner of Joseph Audio, delivered and carefully positioned in my Bed-Stuy bunker a pair of his stand-mounted Pulsar loudspeakers ($7700/pair without stands, serial nos. P-0187L/R), I’ve been experiencing a new variety of audio pleasure. I’d experienced short, scattered moments of a similar pleasure in Joseph’s rooms at various audio shows, but I’d never been able to understand its cause or perceive its full nature until I heard the Pulsars in my home system. As I told Joseph as he walked out the door, “You know, I don’t own any $7700 adjectives.”1 I needed to spend time with the Pulsar so I could understand what made it a Class A (Restricted Extreme LF) product in Stereophile’s list of Recommended Components: Joseph…

Xenakis: Psappha. Morton Feldman: The King of Denmark. Kjell Tore Innervik, percussion 2L 2L-141-SABD (SACD/CD, BD, downloads: DXD, DSD256, MQA). 2018. Morten Lindberg, prod., editing, mix, mastering, balance; Beatrice Johannessen, rec. technician. DDD. TT: 46:04 With 32 Grammy nominations, 24 for Recording Engineer and Music Producer, Morten Lindberg and his 2L label continue to issue one astounding recording after another. Their recordings are not simply unique for their sound, available in multiple two-channel, surround, and hi-rez formats, physical and virtual; they also stand out for 2L’s repertoire, which ranges from core classical, folk, and jazz to cutting-edge contemporary explorations sure to scare away fainthearted record producers and listeners. If the two works on this recording, Xenakis’s Psappha (1975) and Feldman’s The King of Denmark (1964), aren’t exactly new, their construction…

Mary Halvorson, guitar; Amirtha Kidambi, voice; Ambrose Akinmusire, trumpet; Michael Formanek, bass; Tomas Fujiwara, drums Firehouse 12 FH12-04-01-27 (2 CDs). 2018. Mary Halvorson, David Breskin, prods.; Nick Lloyd, prod., eng. DDD? TT: 90:11 A singularly original electric guitarist, Mary Halvorson is perhaps the most innovative representative of jazz’s new avant-garde. For her latest release she’s added lyrics to her music, or rather set her poetic lyrics to music, sung sweetly by Amirtha Kidambi, who numbers modern classical, free jazz, and Carnatic music among her influences. Also featured is the chameleonic trumpeter Ambrose Akinmusire, who homes right in on Halvorson’s quirky wavelength. The other two musicians, bassist Michael Formanek and drummer Tomas Fujiwara, are Halvorson’s bandmates in the trio Thumbscrew. “My Mind I Find in Time” begins with the spiky echo…