Here you can adjust the music/sound compression settings. You can get here by clicking on Compression button at Music & Effect tab.
Compress sound
To enable/disable sound compression
Frequency
To adjust the sound frequency. The higher the frequency the better the sound quality but the bigger the published file size.
Channel
To adjust the sound channel.
Note
The published process will automatically select the original frequency and channel if you try to set them higher than the original settings.