In celebration of its 45th anniversary in 2019, the album was remastered and reissued as a deluxe edition under the title Harmonium XLV via Universal Music Canada.

The reissue contains newly re-recorded material.

It remains the band's most folk-driven album, and features the song that made them famous "Pour un instant".

It features nowhere near as exotic instrumentation as on their later albums, mostly sticking to simple guitar and bass arrangements, with occurrences of drums on a few songs.

^ Shipments figures based on certification alone.