Using Acoustica MP3 Audio Mixer

Alternatively, you can use Acoustica MP3 Audio Mixer to record your LP/audio cassette as one large wave file.
 

To create one big wave file for each side of the LP using Acoustica MP3 Audio Mixer, you must plug in an 1/8" stereo cable from your tape deck or LP record player, to the "Line In" slot of your sound card. 

The Colored "Level Indicator" helps you see whether the volume is too soft or too loud.  Adjust all necessary volumes accordingly to avoid distorted or quiet recordings.

Once everything is in place, start playing your audio cassette/LP and press the "Record" button.