AUDIO EDITOR: CHAPTER TWO 365Calibrating files recorded from different sourcesNot all recording devices have the same calibration or setup. It variessometimes in frequency modulation and amplitude. In such cases, you mayfind that files recorded from these different sources end up with differentbaselines (point 0 on the amplitude scale). Most of the time, this doesn’tadversely affect the overall quality of your tracks as the differences areminute. However, you may encounter some files whose baselines varydramatically and the result of mixing them together produces unacceptabledistortion and noise.Audio Editor allows you to calibrate such files so that they all havematching baselines. Simply click Effect: DC Offset. In the DC Offsetdialog box, you can drag the Offset slider to move the waveform aboveor below the baseline. Moving to the right shifts the baseline up, whilemoving to the left pulls it down. (This does not affect the amplitude of thefile, only its waveform representation.) In this way, you can calibrate anymismatched files to have roughly the same baseline before you decide tomix them into the same audio file.Waveform with an incorrect baselineMixing tracksMixing tracks refers to taking two audio files and combining them intoone. Mixing essentially blends the data from the audio files so that theirrespective sounds overlap and play through one another. When mixing,you can only mix waveforms with the same properties and need to havethe two waveforms already open in the Audio Editor workspace. (To mixfiles with different properties, first convert them or cut one and click Edit:Paste - Mix to paste it into the other.)
