Although the EDU-USB External Sound card is made by the same company as the Andrea PureAudio USB SA and MA Sound Cards the EDU is a bit larger and has a more fragile casing. The EDU also does not come with the Superbeam Array Microphone currently bundled with the Andrea PureAudio USB SA sound card or Andrea Electronics complete PureAudio Voice Solutions Software Suite currently included with the SA and MA (not recommended for speech recognition). If you require a USB sound card for speech recognition use at a lower price the EDU is far superior to other countless inexpensive sound cards found on Amazon and overseas.
Your headset, microphone or speakers will perform only as good as the sound card or integrated audio system that you plug into. Most laptops and PCs today have audio systems built in and it is often placed close to noisy components like the power supply or high frequency processors. In addition, PC's may be used in high noise level environments which can affect the performance of applications, such as those that use speech input.
Andrea's EDU-USB eliminates noise problems as it utilizes high quality digital circuitry. This format bypasses your desktop or laptop computer's sound system, providing increased intelligibility and performance of stereo microphone input and stereo speaker output for all of your digital audio applications including VoIP and speech recognition programs.