CD "Organ of the St. Michael's Lutheran Church Juuru", Juuru Mihkli kirik (2009). Kristel Aer (organ)
CD "Organ of the Kadrina Catherine's Church ", Kadrina kiriku oreli sihtasutus (2008). Kristel Aer, Kersti Petermann, Külli Erikson (organ)
CD "Organ of the St. Michael's Lutheran Church Juuru", Juuru Mihkli kirik (2009). Kristel Aer (organ)
CD "Organ of the Kadrina Catherine's Church ", Kadrina kiriku oreli sihtasutus (2008). Kristel Aer, Kersti Petermann, Külli Erikson (organ)