That card is the low-end configuration for that chip, which is apparently a rare item to begin with, as few cards used Rockwell audio outside of the combined modem/soundcard ones. The higher-end config can offer two additional chips, one being a Music Processor with 1-2MB ROM of Kurzweil Wavetable MIDI and access to up to 8MB of additional sampling memory. The other chip is an Effects processor that offers reverb, chorus, 3D sound, etc. for the MIDI chip. No known use of all three chips exists and the only known use of the Music and Effects Processor together is in the Turtle Beach HOMAC wavetable daughterboard, which was only available with the musician-oriented Turtle Beach Pinnacle Project Studio card that had an unknown chip with a Kurzweil synth set that seems identical to the board, but also used the included daughterboard for MIDI, though it's been shown that packages of the card did not have the daughterboard, so I'm not sure if it was an earlier packaging that came with the board or a later one, though a later review of the card did not have it included in the packaging sent for review, so a DB50XG was used instead. The MIDI from that HOMAC daughterboard is considered passable, but inferior to the daughterboards from Roland, Yamaha, and the GS-compatible offering from Turtle Beach.