Youtube used to be a treasure trove for discovering classical music. Listen to a piece/composer you like and you'd get quite good suggestions to go from there,

Youtube used to be a treasure trove for discovering classical music. Listen to a piece/composer you like and you'd get quite good suggestions to go from there, often from lesser known composers and rare recordings. These days those have mostly been scrubbed from Youtube and if they're still they're they're pretty undiscoverable since the suggestion algorithm is so bad now.