This article is from the Apple II Csa2 FAQ, by Jeff Hurlburt with numerous contributions by others.
The Phasor is a great sound card. Offers you 12 sound channels (using all sorts of wave-form patterns and effects, simular to FM-synthesis in IBMs), 4 white noise generators (synthesized drums, etc) and a 1-voice synthesized speech channel, expandable to 2 speech channels. Has a 4 watt amplifier that can drive stereo speakers (left & right). It's compatible with most older sound cards, like the Mockingboard, ALF, SMS and Echo+. Few programs ever supported it, let alone many programs out there that sup ported the older cards. It did, however, come with some decent software that showed off the card's features and let you experiment with it a bit. The four DIP switches control emulation modes and standard Apple ] [ internal speaker sound-level (only if you disconnect internal speaker and have old speaker toggling sent to Phasor). Switches #1 and #2 are for emulations. Switches #3 and #4 control your old internal speaker sounds, again, if you have speaker disconnected and that pin location on motherboard connected to Phasor. You can set Low, Medium and High volume with three different DIP positions. This doesn't affect Phasor music/sound however. To do that, you must turn those two pots you asked about. Each controls either the left or right stereo channel. Turning them clock-wise increases volume, and you probably don't want this too high up, or sound gets distorted! Put both on an equal setting, unless you want one channel louder/softer than the other.Phasor DIP switch emulation modes: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Native Phasor mode: 1: closed, 2: closed Mockingboard mode: 1: opened, 2: closed Echo+ mode: 1: opened, 2: opened(Never got the Echo+ mode to work!) For more information see FAQs Resource file R013PHASOR.TXT . By: Adrian Whichello