| Light of the World (instrumental) | LEAH | | | 4:23 | strumento |
| Lilien & Rosen | Ougenweide | | | 4:51 | strumento |
| Live From Germany | Shannon | | | 5:54 | strumento |
| Ḷḷaciana | Hevia | | | 3:27 | strumento |
| Loch Lomond | The Sandsacks | | | 2:53 | strumento |
| Lof, aanbidding | Sela | | | 6:27 | strumento |
| Lof, aanbidding | Sela | | | 7:09 | strumento |
| Lord Reign in Me | Vineyard UK feat. Brenton Brown | | | 3:57 | strumento |
| Lovers of Light | Afro Celt Sound System | | | 3:58 | strumento |
| Lucy Campbell / Trim the Velvet / Jenny's Wedding (reels) | Davy Spillane & Kevin Glackin | | | 4:29 | strumento |
| Lugdūnon | Eluveitie | | 3.65 | 4:01 | strumento |
| Lullaby | Seamus Egan | | 5 | 3:25 | strumento |
| Lunasa Jigs: Kerfuntan Jig / Eddie Kelly’s / Give Us a Drink of Water | Lúnasa | | | 4:09 | strumento |
| Lúnasa Klesmir: Frailoch | Lúnasa | | | 4:40 | strumento |
| Lunasa Single Jigs: Hog Ties / Promenade / Gan Anim | Lúnasa | | | 3:58 | strumento |
| Mabon | Omnia | | | 6:13 | strumento |
| Machtig Strijder | Sela | | | 5:31 | strumento |
| Mad Shadows (You Are an Actor) | Sorry For Laughing | | | 13:16 | strumento |
| Mad Shadows (You Are an Actor/Last Day) | Sorry For Laughing | | | 16:39 | strumento |
| Magh Seola (The Level Plain) | Boston Pops Orchestra; Joanie Madden | | | 4:21 | strumento |
| Maid in her Father's Garden | More Maids | | | 3:24 | strumento |
| Máire Bhruinneall | The Travelers VGM | | | 1:58 | strumento |
| Manannán Mac Lir | Máire Breatnach | | | 3:20 | strumento (come “low whistles”) |
| Mansions of Rest | Sorry For Laughing | | | 3:30 | strumento |
| Mary's Jigs | Doolin’ | | | 4:31 | strumento |
| Mason's Apron | The Sandsacks | | | 2:47 | strumento |
| Massive Illusion | Gazpacho | | | 13:37 | strumento |
| Mayo Breton Set: Lord Mayo / Gan Anim | Lúnasa | | | 3:43 | strumento |
| Mc Leod's | The Sandsacks | | | 1:24 | strumento |
| McPhisto's Jig | Thomas Loefke & Norland Wind | | | 2:55 | strumento |
| Meadows of Heaven (orchestral version) | Nightwish | | 3 | 7:10 | strumento |
| Medley Breizh (Me garje bout; L'Hirondelle; La Route de Kemper) | Gilles Servat | | | 6:47 | strumento |
| Melodies Of Life | 植松伸夫 | | | 6:06 | strumento |
| Mick Ryan's Lament | Tim O’Brien | | | 3:21 | strumento |
| Mijn toevlucht (psalm 91) | Sela | | | 5:18 | strumento |
| Milk Wood (Polly's Song) | Sorry for Laughing | | | 5:06 | strumento |
| Minas Morgul | Howard Shore | | 2.65 | 1:58 | strumento |
| Minas Tirith | Howard Shore feat. Ben Del Maestro | | 2.7 | 3:37 | strumento |
| Mirror of Dreams | Ayreon | | 3 | 2:31 | strumento |
| Mizlecca | Hagali feat. 木下珠子 | | | 4:06 | strumento |
| Mna na h Éireann | Sinéad O’Connor | | | 4:19 | strumento |
| Moirrey ny Cainle | Peter Cubberley, Julian Edwards, Sharon Corlett, Cristl Kleiser & Colin Jerry | | | 1:32 | strumento (come “low D whistle”) |
| Molly Maguires | The Sandsacks | | | 2:55 | strumento |
| Moonlight Kiss | Bap Kennedy | | | 3:04 | strumento |
| Morning Nightcap | Lúnasa | | | 4:56 | strumento |
| Morrigan | Omnia | | | 7:05 | strumento |
| Mouth of the Tobique | Sharon Shannon | | | 4:07 | strumento |
| Mr McCusker and Mr McGoldrick's English Choice | Eliza Carthy | | | 4:59 | strumento |
| Muddy Water | Eddi Reader | | | 3:34 | strumento |
| Muireann's Jig | Niall and Cillian Vallely | | | 3:38 | strumento |
| Music | Nightwish | | 3.35 | 7:23 | strumento |
| Music (instrumental) | Nightwish | | | 7:23 | strumento |
| My Walden | Nightwish | | | 5:15 | strumento |
| My Walden | Nightwish | | 3.5 | 4:39 | strumento |
| My Walden | Nightwish | | | 4:38 | strumento |
| My Walden | Nightwish | | | 5:15 | strumento |
| My Walden | Nightwish | | 2 | 5:14 | strumento |
| Naves | Hevia | | | 4:38 | strumento |
| Nemo | Nightwish | | | 4:30 | strumento |
| Nemo | Nightwish | | 2 | 4:37 | strumento |
| Nemo | Nightwish | | | 4:53 | strumento |
| Newry Highwayman | Solas | | | 3:17 | strumento |
| Night 13 | Auri | | | 4:24 | strumento (come “low whistles”) |
| Nikogda | Аркона | | | 4:44 | strumento |
| Nil | Eluveitie | | 4 | 3:43 | strumento |
| Níl 'na Lá | Solas | | | 2:47 | strumento |
| Noel Nouvelet | LEAH | | | 5:16 | strumento |
| Noel Nouvelet (instrumental) | LEAH | | | 5:15 | strumento |
| Noise | Nightwish | | 3.5 | 5:40 | strumento |
| Noise (instrumental) | Nightwish | | | 5:40 | strumento |
| Northern Lights | Lisa Lynne | | | 4:51 | strumento (come “alto whistle”) |
| Norwegian Wood | Tim O’Brien | | 3 | 4:06 | strumento |
| Nothing | Eluveitie | | | 0:58 | strumento |
| Nothing for Everyone | Sorry for Laughing | | | 2:49 | strumento |
| Nursery Rhyme of Innocence and Experience | Natalie Merchant | | | 5:11 | strumento |
| O Jesus Mine | Vineyard UK | | | 3:59 | strumento |
| O’Neill’s Statement | Davy Spillane | | 3 | 5:52 | strumento |
| Ocean of Dreams | Ben Winship & David Thompson | | | 4:06 | strumento |
| OCTOPATH TRAVELER - メインテーマ - | 浜口史郎 | | | 3:20 | strumento |
| Odna | Аркона | | | 5:52 | strumento |
| Of Fire, Wind & Wisdom | Eluveitie | | 3.65 | 3:06 | strumento |
| Of Fire, Wind and Wisdom | Eluveitie | | | 3:33 | strumento |
| Of This Land | Clannad | | | 4:44 | strumento |
| Ogmios | Eluveitie | | | 0:29 | strumento |
| Oh to Kiss Katie | Kíla | | | 4:13 | strumento |
| Ohm Ripples | Máire Breatnach | | | 3:39 | strumento (come “low whistles”) |
| Old Wive’s Tale | Paddy and the Rats | | | 3:26 | strumento |
| On Board (with memories) | Whisper Records | | | 5:53 | strumento |
| On Christ the Solid Rock I Stand | Michael Card | | | 3:46 | strumento |
| One Church | Sela | | | 4:13 | strumento |
| One Song at a Time | Mark Knopfler | | 3 | 6:17 | strumento |
| Only Forward | Indigo Falls | | | 7:09 | strumento |
| Origins | Eluveitie | | | 2:13 | strumento |
| Ornette's Trip to Belfast: Donald Blue / Ornette's Trip to Belfast | Michael McGoldrick & John McSherry | | | 4:46 | strumento |
| Os amores libres | Carlos Núñez | | | 2:15 | strumento |
| Otherworld | Eluveitie | | 3.25 | 1:57 | strumento |
| Otherworld Set | Eluveitie | | 3.5 | 2:34 | strumento |
| Our Decades in the Sun | Nightwish | | | 6:40 | strumento |
| Our Decades in the Sun | Nightwish | | 3 | 6:39 | strumento |
| Ouverture | Sela | | | 4:22 | strumento |
