2p2z~ two-pole two-zero filter F2p2z~ [2p2z~] is a message-based two-pole two-zero filter which is more costly than the filter object f2p~ [2pole~] but less expensive than wahwah~.	from the library : ISPW Compatibility Library Format : External Environment : max / msp freeware Max 3.x / 4.x http://forumnet.ircam.fr//rubrique.php3?id_rubrique=65