The Roland Data Cards are credit card sized and slot into the back of most of the JV range synths, and in the front of the modules. They contain patches and performances, but do not contain any new waveforms. Most cards contain 64 patches and 16 performances. There are two memory cards: M-256E and M-512E. These allow your to store your own patches/performances on the card. Below is a list of Data Cards in the Roland Sound Library for the JV-80, JV-880, JV-90, JV-1000 & JV-1080: • Rich Sound Collection 1 (PN-JV80-01) for use with POP expansion board. • Multi Timbral Sounds 1 (PN-JV80-02) for use with POP expansion board. • Multi Timbral Sounds 2 (PN-JV80-03) for use with POP expansion board. • Rich Sound Collection 2 (PN-JV80-04) uses internal waveforms. • Contemorary Composer (PN-JV80-05) uses internal waveforms. • Rich Sound Collection 3 (PN-JV80-06) for use with ORCHESTRAL expansion board. • Rich Sound Collection 4 (PN-JV80-07) from JV-1000 preset patches. • Memory Card (M-256E) 32K