I found this excellent publication from Shure regarding selection and placement of microphones for live sound reinforcement.
http://www.shure.com/stellent/group...b_resource/us_pro_mics_for_music_sound_ea.pdf
...and this one for studio recording.
http://www.shure.com/stellent/group...ts/web_resource/us_pro_micsmusicstudio_ea.pdf
(I hope these links work. If not go to the Shure web site and do a search on "Microphone Techniques".)
http://www.shure.com/stellent/group...b_resource/us_pro_mics_for_music_sound_ea.pdf
...and this one for studio recording.
http://www.shure.com/stellent/group...ts/web_resource/us_pro_micsmusicstudio_ea.pdf
(I hope these links work. If not go to the Shure web site and do a search on "Microphone Techniques".)