Distortion when recording

Hi guys, can anyone help me with this. I am using Mairlist Version 4.1 Beta 1 build 1434 and when I record the music is distorted. When I record from itunes it is not distorted, in fact it is perfect. Is this as simple as changing numbers in audio settings, and if so, any idea what the settings should be. I am recording through a Lexicon Alpha.

Are you recording through DirectSound, WASAPI or ASIO?

I am using DirectSound

Can you upload a sample audio file so I can get an idea of the exact distortion effect?