These audio tracks were recorded on a MiniDisc recorder. They are in stereo and are saved at the widest possible frequency response (20Hz - 16kHz) available within RealPlayer (hence the large file size). RealPlayer (rm) was chosen over Windows advanced streaming format (asf) because the accuracy of the sound is noticeably better. The track sounds should all run clearly from right to left: sometimes streaming audio mixes this up during playback and you hear left to right or just mono. Replaying the sound again after the first playback usually gets it to play correctly. To really hear how the cars sounded, hook up a pair of full-range, high quality speakers or high quality headphones rather than just using cheap computer speakers.

The recording location was directly across from the grandstands at the Milwaukee Mile, facing the track. The cars accelerate out of the turn off to the right, come down the grandstand straight from right to left, and then decelerate for the next turn. You can occasionally hear voices and other cars in the pit row that was right behind the recording location. The recordings for the cockpit audio tracks were taken while riding in the mechanic's seat.