Aonghas has collaborated as song-writer and librettist with many eminent composers:
| Ronald Stevenson | Neulag air Faire/Small Cloud on the Horizon - song |
| William Sweeney | Salm an Fhearainn/Psalm of the Land – choral work [Capella Nova] * An Seachnadh/The Avoiding – song sequence Gleann Fadamach/Glen Remote [Jazz Improvisation] * An Turus/The Journey – libretto of full-length chamber opera, commissioned and performed by Paragon Ensemble, for Celtic Connections Festival,1998 Airc an Dualchais/Inheritance Ark – song, to open Museum of Scotland (Capella Nova) 1998 Na thàinig anns a churach ud/All that came in that one coracle - song, to open new campus at Sabhal Mor Ostaig, the Gaelic College, Isle of Skye. (Kirsteen Grant and orchestra) 1999 |
| Karen Wimhurst | Six Songs for Danton’s Death - Edinburgh International (Communicado Theatre production) |
| Donald Shaw | Breisleach/Delirium - song [CaperCaillie] * Oran/Song - [CaperCaillie] * Am Fear Allabain/The Wanderer - song {as co-lyricist} [Capercaillie]* Luadh an Torraidh/Harvest Waulking - song Celtic Connections 2004* |
| Malcolm MacDonald | Clach Ard - song |
| Alasdair Nicolson | Sgàthach – libretto of community opera (The Highland Festival, 1997) |
| Phil Cunningham | Two songs for the Highlands and Islands Suite (Celtic Connections Festival, 1997) |
| Andy Thorburn |
|
| Dee Isaacs | Gleann Calbhaidh Bàn/Glencalvie Bare - song for an exhibition |
| Simon Thoumire | Le saorsa dhuinn mar stiùir/And freedom be our guide - song suite for a new Scottish Parliament, 1999* |
| Christine Primrose | Gaidheil Shiatail/Seattle Gaels, 2000* Gaidheil Shiatail/Seattle Gaels, 2000* |
| Phamie Gow | Bu tusa an gaol a bh’air m’aire/You were the love on my mind – song, 2001 |
| Billy Stewart | Sgt John Carmichael – song, 2001* |
| Fred Morrison | 8 songs for Paracas, Rhapsody of the Gael (Celtic Connections, 2005) |
| Savourna Stevenson | Gaelic adaptation of Kahlil Gibran’s Joy and Sorrow [Celtic Connections, 2006]* |
* Commercially recorded