CD "Mart Saar. Bog Bard with a Worldview. Complete Songs I", Kadri-Ann Sumera (2018). Iris Oja (mezzo-soprano), Taavi Tampuu (baritone), Kadri-Ann Sumera (piano)
CD "UMA ja Iris Oja - Peidus pool", UMAMusic (2013). Iris Oja (vocal), Robert Jürjendal (guitar), Aleksei Saks (trumpet)
CD "Resonabilis", Contemporary chamber and solo music for kannel. Kristi Mühling (2009). Kristi Mühling (kannel), Iris Oja (vocal), Tarmo Johannes (flute), Aare Tammesalu (cello). Helena Tulve, Antti Auvinen, Tatjana Kozlova, Margo Kõlar, Age Hirv, Kristjan Kõrver, Märt-Matis Lill, Ülo Krigul
CD "Moon-pain", Dacapo Records (2009). Iris Oja, Remix Ensemble, Paul Hillier, klettWood. Klaus Ib Jørgensen
CD "Rachmaninov, Shostakovich – Songs", Harmonia Mundi (2008). Iris Oja (mezzo-soprano), Roger Vignoles (piano). Sergei Rachmaninov, Dmitri Shostakovich