Про концертный звук
очень познавательная информация.
1. http://kalugin.livejournal.com/26495.html
2. http://kalugin.livejournal.com/26864.html
3. http://kalugin.livejournal.com/26923.html
4. http://kalugin.livejournal.com/27182.html
5. http://kalugin.livejournal.com/27461.html
6. http://kalugin.livejournal.com/27876.html
7. http://kalugin.livejournal.com/27995.html
8. http://kalugin.livejournal.com/28381.html
