What are other classical songs that have sort of a sad melody to them?

* Mozart's Requiem Mass in D minor - Lacrimosa (or most of the rest of the Mass) is a pretty serious downer. He wrote this knowing that he himself was dying - though he didn't know why. He is thought to have believed that Angels gave this music to him for his own funeral. He never finished it, it was finished for him.

** Beethoven's Piano Sonata No. 14 in C-sharp minor, Opus 27 No. 2 (Moonlight Sonata), adagio sostunuto (1st movement) has to be one of the most heart wrenching devotions to unrequited love ever written. It's hard to come up with anything that compares.

* Ravel's Pavane pour un Enfante Defunte is incredibly sad to me though probably not intended by the composer to be so. http://www.youtube.com/watch?v=OqAlMItkV44&feature...

* J.S. Bach Komm Süßer Tod (Come Sweet Death) - pretty strong downer too. http://www.youtube.com/watch?v=AkEX7MnBTrg&feature...

* Several Chopin piano nocturnes - especially the C# minor

* Leoncavallo's Vesti la Guibba from Pagliacci http://www.youtube.com/watch?v=6R0iaRcUqDI&feature... very sad indeed. What's sadder than a clown crying over his cheating wife while putting on his clown-suit for the show - "on with the play"?

* I find Franz Schubert's Ständchen to be incredibly moving. It's a love song too. http://www.youtube.com/watch?v=fblAbPWfNew (instrumental) or http://www.youtube.com/watch?v=XS-YDL5GeWA (vocal) -- it has happy, hopeful, and sadness in one piece and sometimes at the same time.

The ancient Greeks believed that music could have an effect on your health (both positive and negative) and there's some support for that idea. Be sure to bring your mood back up after you listen to stuff like this or you'll face a pretty gloomy day.

I like Delibes Flower Duet from Lakmé as a mood lifter http://www.youtube.com/watch?v=8Qx2lMaMsl8

or the Presto Agitato (3rd movement) of Beethoven's 'Moonlight' sonata. Some people think this is the reason that movement is there at all. ☺ Notice, as you listen, that it seems to be a fight between anger, sadness, and happiness. Happiness wins in the end but anger and sadness are still right there behind it.

U could try:

- fantasia in f minor for 4 hands by Schubert (kinda sad, at some point passionate even, reaally beautiful)

- chopin 14th nocturne (not exactly "sad" but a bit nostalgic)

these are romantic melodies although u said classical but I guess u referred to all music up to the XIXth century. Well I hope this helps :D

Windless Sky (check out version by Fiona Laskaris on i-Tunes) or Adagio Dolente by Mark Sinclair.

Miserere by Gregorio Allegri!

pachelbels canon

romanza anonimio

air on a g string - bach

theyre not in minor, but from a certain perspective they can be considered sad

rachmaninov piano concerto number 2.the sloww movement