Apogee
Apogee Electronics is an American manufacturer of audio interfaces, analog-to-digital and digital-to-analog converters, USB & iOS microphones, and audio production software. Apogee Electronics initially made its name designing anti-aliasing filters that solved many of the early problems associated with digital audio.
In 2006, Apogee Electronics began introducing a series of audio interfaces for Mac, beginning with the Symphony and Ensemble multi-channel interfaces, popular for their ability to handle large channel counts. Apogee Electronics followed those up with their 2-channel Duet and 4-channel Quartet audio interfaces.