Excessive program levels can cause strange distortions during digitization. While the clipping of an analog audio signal produces a well-known harmonic distortion, the overload of the ADC results in the appearance of non-harmonic components. The human sense of aliasing effect is usually more dubious than the sense of harmonic distortion, so spurious sounds are more likely to get into a digital recording because of an overload, than in an anlog one. It is especially dangerous, when pre-emphasis is applied prior to the A/D conversion. Theoretical and experimental investigations of these phenomena show that this problem can be reduced significantly by means of a very simple circuit.
Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $33 for non-members and is free for AES members and E-Library subscribers.