Andrea Electronics offers an USB High Fidelity External sound card named as the PureAudio USB-SA. The USB-SA from Andrea Electronics takes the form of a USB flash drive. It is designed to be used to enhance the sound of any existing legacy headset, microphone or speaker by replacing the computer’s existing integrated sound system and eliminating external noise, simultaneously increasing both the intelligibility and performance of stereo microphone input and stereo speaker output.



Andrea added this USB sound card provides it digitally enhanced sound by filtering specific audio parameters, including the quality of transmit and receive, eliminating distortion and acoustic echo. It is available now at $44.95.

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