Different Volume settings for Different players

I am implementing a audio based application. In my application I need to play the songs from my internal iPod application and application sounds simultaniously. I used 2 players , one with avaudio and another one with MPMusicPlayer. But my problem is I need to input 2 different volume levels for these 2 different players. When I try to do it it i开发者_如何学编程s changing both players volume.

Can you guys please help me on this?

Thank you, Sekhar.