Sound Effects Generator for Use with the Cockpit Research and Experimentation Work Load Simulator (CREWS).

摘要

This manual describes the sound effects generator (SEG) developed for Digital Equipment Corp. UNIBUS computers. It provides the operational and programming information for using the SEG on DEC VAX UNIBUS computers. The SEG can produce a variety of complex sounds through two independent channels. Each channel is capable of producing noise and three tones with mechanisms provided for mixing the noise and tones, controlling the amplitude of each tone, and shaping the envelope of each channel for final output. Being a register-oriented device, the SEG is ideal for real time applications, requiring very little computer processing time to generate and alter sounds. The SEG is built on a single quad-height UNIBUS Foundation Module and plugs directly into a small peripherals controller slot on the UNIBUS back plane. Application programming is accomplished using FORTRAN callable subroutines which initializes and alter the desired sounds. Keywords: Digital sound generation; Synthesized sound; Noise generation; Tone generation; Real time. (edc)