Here are a few nice pieces of music to listen to  on youtube. Some of the videos are not all that great but you can minimise the picture and just listen to the music, which is great! The last two listed....Canadian Brass...... are top listening.

classical guitar:  http://www.youtube.com/watch?v=AkTKhnoBDto&feature=related 

classical guitar:   http://www.youtube.com/watch?v=HngtLWLkMs8  

Handel Water Music
http://www.youtube.com/watch?v=RaqcRcVJo1Y
     
Mozart Horn Concerto
http://www.youtube.com/watch?v=L_TrR2uH3T4

Purcell Trumpet Voluntary
 http://www.youtube.com/watch?v=JuHtLxxuJsY

Canadian Brass
http://www.youtube.com/watch?v=WtAvTasKNvE

Canadian Brass
http://www.youtube.com/watch?v=HlkRI-YmT_E&feature=fvw