Friday, March 6, 2015

Does vinyl really sound better? -- An engineer explains (eng)


   Even Steve Jobs listened to vinyl.
   The late Apple CEO, whose iTunes Store revolutionized the music business for the online era, "listened to vinyl" at home, Neil Young said in 2012. Young, who's now hawking his $399 high-definition PonoPlayer, has a stake in the mythologizing of studio-grade sound, but he's not the only believer. As compressed MP3 files and digital streaming services from YouTube to Pandora have become the norm for music listening, vinyl sales have skyrocketed from under a million in 2007 to potentially more than 8 million this year in the U.S. alone — in part thanks to the thinking that vinyl just sounds better.



   Is that true? Kind of. Sometimes. It depends. The vinyl LP is a format based on technology that hasn't evolved much over the last six decades: in some ways, it's the audio equivalent of driving a Ford Pilot. Sonically, vinyl has both strengths and weaknesses compared to digital files, just as movie buffs have argued over the pros and cons of 35mm film against 4K digital. To break down what vinyl can really do, I spoke with Adam Gonsalves of Portland's Telegraph Mastering. Gonsalves has worked with artists ranging from Sufjan Stevens to Steve Aoki and proudly owns a '60s Scully lathe, the ruby-tipped device that cuts lacquer discs for plating and vinyl reproduction.
   Before weighing vinyl's, ahem, good and bad sides, it helps to know how records are made. In brief, an engineer such as Gonsalves receives mixed recordings from the studio (or even a band's laptop) to master and cut to a lacquer, which is mailed off to be impressed upon the sets of metal stampers which will press hundreds or thousands of PVC pellets into vinyl LPs. Not every mastering engineering cuts lacquers — lathes haven't been made in decades and are in short supply, which keeps owners like Gonsalves busy — and Gonsalves is often sent digital files to work from rather than the all-analog tape one might expect.

The good
   
   "Vinyl is the only consumer playback format we have that's fully analog and fully lossless," Gonsalves said. "You just need a decent turntable with a decent needle on it and you're going to enjoy a full-fidelity listening experience. It's a little bit more idiot-proof and a little bit less technical."
The analog format allows for artists to transport their music from magnetic tape to LP to your speakers or headphones without the complications of digital conversion. This, ideally, is the closest one can get to what the artist intended — if the artist recorded on tape and sent the reels over to an engineer like Gonsalves to cut a lacquer master from. But whether its origins are digital or analog (more on this later), a vinyl disc should have more musical information than an MP3 file — so it should be an improvement on streaming sites such as YouTube or SoundCloud, especially on a good system.
   Fighting the loudness wars: Digital music engineering, particularly for radio-bound music, is often marred by a volume arms race, which leads to fatiguing, hyper-compressed songs that squish out the dynamics and textures that give recordings their depth and vitality. Vinyl's volume is dependent on the length of its sides and depth of its grooves, which means an album mastered specifically for the format may have more room to breathe than its strained digital counterpart. The longer an album, the quieter it gets: Gonsalves played me Interpol's lengthy debut album and a 12-inch Billy Idol single, and the decibel difference — without any distortion creeping in — was remarkable. 
   That warm vinyl sound: "I think this is what people like about it: it pins very closely to the way that human beings hear music organically," Gonsalves said. "It's very mid-range-y and very warm," a sound that flatters the fuzzy guitars of rock 'n' roll.

The bad

   "All-analog" doesn't always happen: Many modern vinyl records are produced from digital masters, either recordings made natively in software such as Pro Tools or converted from tape before being sent along for mass production. When I visited Gonsalves, he was working on My Brightest Diamond's new album — from his computer. But analog-to-digital conversion (and vice versa) has come along quite a bit since the birth of the CD, and Gonsalves says he asks for high-definition, 24-bit files to master from if digital’s the option.
Still, as artists and labels hop on the vinyl trend, some new vinyl releases may be mastered from CD-quality audio, not the high-resolution formats audiophiles and folks like Neil Young adore. Is a CD-quality album going to sound more accurate on vinyl than a CD? Nope. But it will sound more vinyl-y, if that's your preference.
   "There's basically nothing you can do to make an hour-long album on one record sound good," Gonsalves said. Vinyl's capable of a lot, but only if the grooves are wide enough for the needle to track them properly. A longer album means skinnier grooves, a quieter sound and more noise. Likewise, the ear-rattling sounds of dubstep weren't really meant for your turntable. "If you had taken Skrillex into Motown Studios, they would've said, ‘It's uncuttable!’" Gonsalves said, thanks to the strain the high-energy music would put on the needle’s journey.
   Vinyl can struggle with highs and lows: High-pitched frequencies (drum cymbals, hi-hats) and sibilance (think “s” sounds) can cause the ugly crackle of distortion, while deep bass panned between the left and right channels can knock around the needle. “It should basically be in mono," Gonsalves said. Otherwise, "that's a hard path for a needle to trace."
   The beginning of an album side sounds better than the end: As the album's circumference shrinks toward the middle, the needle speed changes and it can’t follow every millimeter of the groove. If the song that closes side A or B is a complicated one — say, one with a busy harmonica solo — it may well sound less than hi-fi. That's why those double-LPs are worth the extra flipping.
   Surface noise: "The warm sound of the vinyl, that's a form of noise that you get from dealing with the lacquer material and having it go through this manufacturing process," Gonsalves said. The vinyl format can generate other issues: crackles and pops, records that skip and the whine of a needle against the LP, all problems that the CD advertised itself on solving decades ago. But for many, these sounds are just part of the vinyl experience, adding to the charm of a format that takes some extra effort — and often rewards it.
— David Greenwal


sursa:  oregonlive.com

Wednesday, March 4, 2015

How They Did It: Professional-Grade Screening Room (eng)



       How They Did It: Professional-Grade Screening Room


   This homeowner, who works for a major Hollywood studio, wanted a room where he could view Digital Cinema Packages (DCPs) and dailies during evenings and weekends without traveling to his studio offices. The room also needed to serve as a home theater for the purpose of viewing TV, Apple TV, Xbox, and Blu-ray content.

   CEDIA member Bradford Wells + Associates, based in Los Angeles, created a pro-quality screening room that earned the Level V Bronze Technical Design award for Home Theater in CEDIA’s 2014 Electronic Lifestyles® Awards competition.



HT L5 Bronze Screen


Technical Highlights:


   The whole room was fully sound-isolated using resilient construction and vibration-damped sheet rock layers. It has a 12-ft.-6-in.-wide Cinemascope screen with electronic horizontal side screen masking and an acoustically transparent screen. 

   The room is fully DCI (Digital Cinema Initiatives) compliant, including a DCI-compliant projector from NEC and a cinema media server from Doremi. The projector is a small-footprint digital cinema projector housed in a custom hush box enclosure at the back of the room. 



HT L5 Bronze Seating


   The room's dimensional challenges called for a speaker with the least possible depth. It was decided that a planar-type front-channel and surround-channel speaker was the obvious pick. At the same time, the planar-type speakers had to have studio-grade power handling capacity and a flat frequency response. 

   The custom "hush box" that housed the projector also had to meet required special ventilation and noise-isolation parameters consistent with the low noise floor of the room. Bradford Wells + Associates engineered a sophisticated audio system, including Wisdom Audio speakers and quad JL Audio subwoofers. 

   The equipment racks housing the digital cinema server, room EQ, eight-channel surround preamp, power amplifiers, source equipment, and control equipment were all tucked away neatly next door in an air-tight, air-conditioned, acoustically controlled closet with studio-grade tech power.



HT L5 Bronze Screen 2


Challenges:


   The project began as a remodel of an existing media room. The original space was small and cramped, so Bradford Wells + Associates worked with the theater consultant and the builder to thoroughly redesign the structure of the room. The front half of the floor was dropped 18” into the crawl space to make room for a riser scheme, and the front wall was pushed back into what was originally a ventilation closet. 

   Equipment had to be fit in without taking away any more room length, width, and height than was absolutely necessary. To compensate, all room equipment and acoustical materials had to be dimensionally scrutinized and made to work. From the acoustical absorbers and diffusers, to the HVAC system ducting, to the audio and video equipment, everything had to fall within the room's established dimensional, electrical, and acoustical spec.



HT L5 Bronze Seating 2


   One of the challenges of the electronics package was the integration of all the consumer gear, including Blu-ray, satellite, and more, with the digital cinema equipment. The 7.1 DCI audio signal was run through a multi-channel D-to-A converter and then into the 7.1 channel analog input of the Marantz decoder. The team had to implement bass management externally using an Ashly 8x16 digital audio processor. The Ashly unit also ran the Wisdom bi-amplified speaker crossovers and full room correction equalizations.



HT L5 Bronze Rack


Calibration:


   The NEC NC900C Digital Cinema Projector was calibrated with a Photo Research PR-655 Spectroradiometer and a JETI Specbos 1211 Reference Spectroradiometer. The projector was calibrated to meet DCI specification (white point x=0.314, y=03.351, Y=14 fL, DCI color gamut, Gamma 2.6) for playback of DCPs. Two separate MCGD (Measured Color Gamut Data) files were crested to accommodate the two necessary color correction for both 2D and 3D projection through active shutter glasses.    For consumer HD source material, the projector was calibrated to meet REC 709 requirements (x=0.313, y=0329, Y=14 fL, REC 709 color gamut, Gamma 2.2). 

   The room was carefully measured using both impulse response and FFT analysis with 4-microphone spatial averaging. All corrections were meticulously implemented in a digital high-resolution equalizer. The team also listened to the results and fine-tuned the whole system with an eye toward 2-channel audiophile-grade performance as well as a high-impact and dynamic multi-channel cinematic experience. The calibration team comprised veterans of THX, Technicolor, and the Academy of Motion Picture Arts & Sciences.



HT L5 Bronze UI

sursa: cedia.net/

Tuesday, March 3, 2015

BREAKING RECORDS: HERE ARE THE FIVE BEST-SELLING VINYL RELEASES OF 2014 (eng)

   The vinyl resurgence continued through 2014, the Wall Street Journal notes in a fascinating piece yesterday, and like most things, there’s good news and bad news. On the positive, nearly eight million vinyl records were bought in the United States over the past 12 months, a 49 percent increase in sales from the previous year. The bad? Vinyl accounts for only 2 percent of the market share, and as the WSJ notes, most vinyl factories can’t keep up with the demand. One plant, United in Tennessee, accounts for 90 percent of all vinyl production.

   So who dominated the turntable charts in 2014? Some usual suspects.
   Jack White’s sophomore album Lazaretto was our country’s best-seller, moving 75,700 vinyl units — making it the best-selling domestic vinyl release since Pearl Jam issued Vitalogy in 1994.
   Rounding out the Top 3 are Arctic Monkeys’ AM with 40,600 (a release that surpassed a million in sales in the United Kingdom, according to the NME), and the Black Keys’ Turn Blue, which sold 28,300. Lana Del Rey’s debutBorn to Die, and Beck’s Morning Phase rounded out the Top 5.
Here’s a closer look…
1. Jack White, Lazaretto: 75,700
jack-white-lazaretto
2. Arctic Monkeys, AM: 40,600
Arctic AM
3. The Black Keys, Turn Blue: 28,300
Black Keys
4. Lana Del Rey, Born to Die: 27,200
DR Born
5. Beck, Morning Phase: 25,200
Beck