The GRAMMY Awards honor recordings in 108 categories across 32 fields, from rap to rock to classical. To help readers get a better sense of the breadth of the nominees and the wealth of recordings they've created over the last year, GRAMMY.com has prepared these field Roundups, which provide quick but insightful comments on the nominees in an easy-to-read format.

Nominees for PRODUCER OF THE YEAR, NON-CLASSICAL, are mostly GRAMMY-winning veterans themselves, but the list is led by Danger Mouse, a leading light in new music's avant garde who conceived the acclaimed The Grey Album and who garnered critical raves for Gorillaz's Demon Days, for which he's nominated. Nigel Godrich's work with Paul McCartney for Chaos And Creation In The Backyard earned him this nomination, and secured GRAMMY nominations for the album and single this year, as well. Jimmy Jam and Terry Lewis are nominated once again as a team on a slew of great tracks, including Yolanda Adams' "Be Blessed," Gwen Stefani's "Harajuku Girls," Earth, Wind And Fire's "Pure Gold" and Mary J. Blige's "Never Too Much." Steve Lillywhite, whose production career now spans four decades, is nominated for work with a veteran group — U2's How To Dismantle An Atomic Bomb — and a remarkable newcomer, Jason Mraz, for his Mr. A-Z. One of music's all-time great production teams, the Neptunes are nominated for six tracks including "Already Platinum" by Slim Thug Featuring Pharrell, "Hollaback Girl" by Gwen Stefani, "On & On" by Missy Elliott, and "Touch" by Omarion.

For BEST ENGINEERED ALBUM, NON-CLASSICAL, Eric Clapton's Back Home brought together Alan Douglas and Mick Guzauski as the album's GRAMMY-nominated engineers. Nashville-based Gary Paczosa teamed with artist Chris Thile to engineer his album Deceiver, underscoring how digital recording has deeply enmeshed the artist in the technical aspect of the recording process. Gary Paczosa is also nominated in this category for his work on Alison Krauss And Union Station's Lonely Runs Both Ways. Steve Lillywhite, already nominated as Producer Of The Year for Jason Mraz's Mr. A-Z, teamed with Carl Glanville, Kevin Kadish, Samuel "Vaughan" Merrick, Jim Scott and David Thoener to engineer the album. Al Schmitt, now in his sixth decade as an engineer, earned his first GRAMMY Award in this category in 1962 and has racked up 14 additional GRAMMYs since then for artists including Diana Krall, George Benson, Natalie Cole and Quincy Jones. This year Schmitt is nominated once again, this time for Paul Anka's Rock Swings.

BEST REMIXED RECORDING, NON-CLASSICAL, recognizes the growing critical importance of remixers as modern music becomes more than the sum of its parts. This year, a lot of timeless standards lead the pack. Adam Freeland, one of London's most respected DJs who draws eclectically from deep house, techno, drum & bass, and world music, is nominated for the Sarah Vaughan classic "Fever (Adam Freeland Remix)." Joachim Garraud, producer and remixer for artists including Kylie Minogue and Kid Vicious and co-founder of several labels, and David Guetta, Parisian partymeister and club DJ, teamed to do "Flashdance (Guetta & Garraud F*** Me I'm Famous Remix)." Another classic track from a classic film that hit big in 2005 was Curtis Mayfield's "Superfly," and the remix — "Superfly (Louie Vega EOL Mix)" — by Louie Vega is nominated in this category. Jacques Lu Cont, the mastermind behind pop music phenomenon Les Rhythmes Digitales, is nominated for a remix of the Killers' "Mr. Brightside (Jacques Lu Cont's Thin White Duke Mix)." Rounding out the nominees is the remix team Meat Beat Manifesto, who brought new life to Tower Of Power's "What Is Hip (T.O.P.R.M.X.)."

For PRODUCER OF THE YEAR, CLASSICAL, Christopher Adler is nominated for his productions of Bach: Cantatas (Thomas Quasthoff, Rainer Kussmaul, Members Of The RIAS-Kammerchor, Berlin Baroque Soloists); Beethoven: Piano Cons. Nos. 2 & 3 (Martha Argerich, Claudio Abbado & Mahler Chamber Orchestra); Chopin: Scherzi/Impromptus (Yundi Li); and Lamento (Magdalena Kožená, Reinhard Goebel & Musica Antiqua Köln). Steven Epstein, who has received 27 nominations and 11 GRAMMY Awards, is nominated this year for Brahms: Music For 2 Pianos (Yefim Bronfman & Emanuel Ax); Music For Organ, Brass And Timpani (Anthony Newman, Graham Ashton, Graham Ashton Brass Ensemble & Duncan Patton); and Silk Road Journeys: Beyond The Horizon (Yo-Yo Ma & The Silk Road Ensemble). Michael Fine, who won the Award in 1992, is nominated this year for Fuchs: An American Place (JoAnn Falletta & London Symphony Orchestra); Ranjbaran: Persian Trilogy (JoAnn Falletta & London Symphony Orchestra); and Soul Of Tango (Gisèle Ben-Dor, Juanjo Mosalini & Santa Barbara Symphony). Tim Handley is respected both as a producer and a recordist, and is nominated for Adams: Shaker Loops (Marin Alsop); Bolcom: Songs Of Innocence And Of Experience (Leonard Slatkin, Christine Brewer & Joan Morris); Brahms: Sym. No. 1 (Marin Alsop & London Philharmonic Orchestra); Daugherty: Philadelphia Stories (Marin Alsop & Evelyn Glennie); and Glass: Syms. Nos. 2 And 3 (Marin Alsop & Bournemouth Symphony Orchestra). Noted producer Thomas C. Moore gets the nod for Chausson: Le Roi Arthus (Leon Botstein, Apollo Voices, A. Kennedy, D. McIntyre, G. Sorenson, D. Okulitch, F. Le Roux, S. O'Neill, S. Bullock & A. Schroeder), 4 + Four (Turtle Island String Quartet With Ying Quartet), and Mozart: Flute Cons., Sym. No. 41 (Martin Pearlman & Boston Baroque).

The BEST ENGINEERED ALBUM, CLASSICAL, category nominees include Tim Handley For Bolcom: Songs by Carole Farley & William Bolcom. Jin Choi, Jean-Marie Geijsen and Erdo Groot engineered recordings of Britten, Bartok & Hartmann for Gordan Nikolic & the Netherlands Chamber Orchestra. Erdo Groot is nominated again, this time working with Roger De Schot on Bruckner: Sym. No. 7 for Yakov Kreizberg & Wiener Symphoniker. Barry Wolifson is nominated for his engineering on Chesky: Area 31 for Anthony Aibel & Area 31. And Da-Hong Seetoo garners his nomination this year for Mendelssohn: The Complete String Quartets for the Emerson String Quartet.

The BEST SURROUND SOUND ALBUM takes note of one of music production's more spectacular technologies and recognizes the mixer, mastering engineer and producer. The surround version of the classic Brothers In Arms — 20th Anniversary Edition by Dire Straits brings nominations to Chuck Ainlay, surround mix engineer; Bob Ludwig, surround mastering engineer; and Ainlay and Mark Knopfler, surround producers. The ubiquitous Al Schmitt is here for his work as surround mix engineer and surround producer on Diana Krall's The Girl In The Other Room, along with Robert Hadley and Doug Sax, surround mastering engineers. The surround version of Elton John's masterful Honky Château draws nominations for Greg Penny for all three roles: surround mix engineer, surround mastering engineer, and surround producer. The surround edition of In Your Honor from the Foo Fighters garners nominations for Elliot Scheiner, surround mix engineer; Bob Ludwig, surround mastering engineer; and Nick Raskulinecz, surround producer. A classical surround entry rounds out the category, with surround mix engineer and surround mastering engineer Phil Rowlands joining with Nick Parker as surround producers for Mussorgsky/Stokowski: Pictures At An Exhibition — Boris Godunov — Night On Bare Mountain, by José Serebrier & the Bournemouth Symphony Orchestra.