I have a problem in which, when I’m recording on audacity, the recording is fine till 10 minute of recording. But after that, the sound starts to get very low in between and becomes normal. It’s like High and Low sound together after 1 minute of recording, even when It’s not there. Somebody please Help!
Not enough information to help. Have a read of How to post a question on the forum. All we can guess is that you are recording some kind of piano. What kind of piano, how, what version of Audacity, what operating system, we’re in the dark.
If you are on Windows recording into the mic in, you will want to turn off Windows Sound Enhancements: http://manual.audacityteam.org/o/man/faq_recording_troubleshooting.html#enhancements. And you should not be recording a piano that way, in any case.