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This means adjusting the distribution of your sound through different channels, such as left and right speakers. Most songs don't sound as good when they're played in just one channel (mono). Listen to your song through completely and do a bit of mixing. You might need to adjust the panning and volume. Maybe you've tried recording riffs or segments of your track already, but remember to record your complete track as well. FL Studio has a helpful function if you forget: it remembers MIDI notes from about the previous five minutes, even when not recording. To regain a riff, go to an empty pattern, and then click “Dump Score Log To Selected Channel”. Before you export your song, you can go into options and modify the "project info" or metadata that a media player will display. Here, you can change such things as the name your song, the artist's name, comments, and the song's genre. You can save to file forms WAV, MP3, MIDI and OGG.  Exporting is done through the File menu in a process called rendering. Pull down the menu and select the file type and quality you'd like to save your project as.  You won't be able to play back saved projects in the FL Studio Demo version. To open saved projects fully, you'll have to register FL Studio and plugins. The only other limitation of the demo version is that you might also hear some static, white noise, or silence using some of the plugins. That said, the demo version is still very functional and a great way to learn FL Studio.
Pan the different parts when you're finished. Record. Change your song's metadata. Export your song once you are satisfied with it.