• “He has a technician's mind and a musician's heart. I didn't really think my master tapes and files could be improved until I heard what Greg did with them. I could have worked with many of the world's best mastering engineers in remastering my ECM catalog, but one of the world's best is right here”

    — Steve Tibbetts, ECM Recording Artist

  • “Greg has mastered several records of ours and cut many more, and his communication is always superb, the quality never not excellent”

    — John Beeler, Asthmatic Kitty Records (Sufjan Stevens, Angelo de Augustine)

  • “Greg Reierson at Rare Form Mastering has the golden ears and he's super easy to work with. I have only the highest regard for his work - you'll be happy to have him master your records”

    — Dan Wilson, Semisonic, Songwriter for Adele, Taylor Swift, Dixie Chicks (etc. etc!!)

  • “Mastering is a subtle art form that can make or break your record. Greg is a true artist, finding all the right frequencies”

    — Bobby Z, Prince and the Revolution

  • “I've worked with Greg at Rare Form on a couple vinyl projects and could not be happier. These projects were for major vinyl reissues and a new release that all needed to make a lot of very cranky, very picky fans happy and Greg nailed it. 5 stars, would recommend”

    — Jessa Zapor-Gray, ZG Inc.

  • “a vinyl record can only be as good as its primary source. Rare Form Mastering is that source. Can’t get much better than Greg and Rare Form Mastering. Top Notch!”

    — New Orleans Record Press

  • “Greg has always gone beyond the call of duty for me. He has great ears and has great suggestions if my mix is missing something. Greg is one big EAR!”

    — Paul Peterson, Prince, The Time, The Family a.k.a. fDeluxe (and on and on)

  • “We recommend Greg to every musician who wants their creation to sound its best. Our music is very eclectic and he is able to make all the genres shine, whether it’s folk, electronica or indie rock. Thanks!”

    — Craig Minowa, Cloud Cult

  • “His fine combs and processes sculpt frequencies magically. Vinyl projects in particular have benefitted from his tweaks. I’ll never use anyone else. He’s the best”

    — Adam Levy, The Honeydogs,, Turn Turn Turn (and so many more…)

  • “Greg is the absolute best! Doomtree Records does all our vinyl cutting with Rare Form and the attention to detail and sonic quality that Greg is able to pull out every single time is always top notch. Can't recommend him enough.”

    — Lazerbeak: Doomtree Records

  • “Greg is a true pro - a long time member of the "Gotta Groove Vinyl Dream Team", he receives a wide variety of audio - both in terms of genre and preparedness for the format (some not prepared at all). He knows how to take what is provided and make it work best for the vinyl medium. Highly recommended for mastering and lacquer cutting.”

    — Matt Early: Gotta Groove Records

  • “As a full time record producer for nearly fifteen years, Greg Reierson at Rare Form Mastering has mastered more projects for me than anyone. I trust his ears and skill implicitly. Thanks so much for your continual great work, Greg. You are so good at what you do and so incredibly easy to work with.”

    — Matt Patrick: The Library Studio

  • “Greg makes it pop!”

    — David Z: Prince, Alexander O'Neal, Fine Young Cannibals

  • “Rare Form is an absolute pleasure to work with. Nothing but the utmost professional in all aspects.”

    — Andy Weber: Smashed Plastic Record Pressing

  • “Greg mastered her album Diamonds & Dynamite. He has incredible ears and is highly skilled. He's very knowledgeable, professional and meticulous. He pulled through for us when we had a mastering emergency, by cutting a lacquer on short notice. He brings out the best in the music!”

    — Beatrice Nezod: (On work with guitarist Donna Grantis.)

  • “Greg at Rare Form Mastering has been a go to for me over the past 20+ years for mastering my projects. I've been thrilled every time with his ability to bring clarity, punch, consistency and analog warmth to my mixes no matter the genre. We got Greg's master of our new Storyhill record, "Bethlehem" last week and are overjoyed with the results. Thanks for being so easy to work with, Greg!”

    — John Hermanson: Storyhill

  • “When you are making a record you want to find the right person for every single part of the process. When it comes to mastering and lacquer cutting, Greg at Rare Form Mastering is 100% the right person. Not only is he a master at his craft but he is so great to work with. The man knows his stuff and at the end of the day he wants to make the very best record he can....for you!”

    — Justin Kristal: President of Copycats Media

  • “Greg has done hundreds of projects for K-tel through the years. His quality of workmanship, attention to detail and musical knowledge keep us coming back. Greg is great to work with and he really cares about what he's doing.”

    — Steve Wilson: K-Tel International

  • “Not only is Greg great at making records sound amazing, but he understands the nuances of delivering for various formats (CD, streaming, YouTube, etc.), and has been patient enough to explain it.”

    — Frank McDonough: McDonough Management (Nashville, TN)

  • “Rare Form has been my No. 1 stop for lacquer cutting services for over five years. Over numerous vinyl releases we have rarely had to reject a test pressing, and if there is an issue Greg is quick to have our back and diagnose the actual problem through discussions with the pressing plant. One of the best around.”

    — Adam Bartlett: Gilead Media

  • “When working with Greg you are getting more than his amazing ears, you’re also getting, in a sense, an extra producer. Rather than just “fix” what he was given, Greg made suggestions in my mixes that could never have been fully corrected in Mastering. I truly appreciated the time and effort and excellence that came from my experience with Rare Form Mastering.”

    — Marshall Charloff

  • “I've used Greg for a couple hundred albums, from simple DDP assembly to involved editing, restoration, tweaking, and mixing. He's reliable, creative, timely, personable, open to a wide variety of musical aesthetics, and pays close attention so I can be sure my final masters are pristine. He's my label rock and can be yours too.”

    — Philip Blackburn: American Composers Forum

  • “Top notch mastering and great service . Most Pravda Records get mastered by Greg at Rare Form. An experienced leader in the industry and reasonable prices.”

    — Kenn Goodman: Pravda Records (Chicago, IL)

  • “Greg is fantastic. World class ears IMHO. Personable, meticulous. And the sound is perfection. And on top of that he's fast. Really. I feel so lucky he works in my town.”

    — Matt Wilson: Trip Shakespeare