Editing Macintosh Quadra 660AV (section)

== AV Features ==

The "AV" designation indicates audiovisual capabilities beyond standard Macintosh models:

* '''AT&T 3210 DSP''' — A 55 MHz digital signal processor handles video compression, speech recognition, and audio processing, reducing CPU overhead for multimedia tasks<ref>{{cite web |url=https://lowendmac.com/1993/centris-660av-quadra-660av/ |title=Centris 660av (Quadra 660av) |publisher=Low End Mac |access-date=2026-02-10}}</ref>
* '''Video Input/Output''' — S-Video and composite RCA ports for capturing and outputting video signals
* '''GeoPort''' — High-speed serial port for telephony applications; an optional GeoPort Telecom Adapter enabled fax and modem functionality without dedicated hardware
* '''PlainTalk''' — Enhanced speech recognition and text-to-speech using the DSP

The 660AV was the first Macintosh to include GeoPort technology.