Browse Prior Art Database

Audio Switch for Educational Laboratories

IP.com Disclosure Number: IPCOM000105862D
Original Publication Date: 1993-Sep-01
Included in the Prior Art Database: 2005-Mar-20
Document File: 2 page(s) / 57K

Publishing Venue

IBM

Related People

Dorak Jr, JJ: AUTHOR

Abstract

Disclosed is a computer-controlled switch for routing audio signals among standard recording and playback devices, and a number of headphones with microphones, which may be used by the students and teachers in an educational laboratory, such as a music or language laboratory.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 84% of the total text.

Audio Switch for Educational Laboratories

      Disclosed is a computer-controlled switch for routing audio
signals among standard recording and playback devices, and a number
of headphones with microphones, which may be used by the students and
teachers in an educational laboratory, such as a music or language
laboratory.

      As shown in the Figure, audio switch 1 is connected to various
audio devices, such as a tape recorder 2 and a compact disk player 3.
Also connected to switch 1 are a number of student audio stations 4,
each of which includes a pair of headphones and a microphone, and a
similar teacher audio station 5.  These connections provide means to
transmit audio signals to and from switch 1.

      Also provided as a part of the teacher's workstation is a
computer unit 6 including means to generate digital signals to
transmit over a digital link cable 7 to switch 1.  These digital
signals, which are used to condition switch 1 so that various of the
student audio stations 4 are connected to various audio sources, such
as tape recorder 2 and compact disk player 3, preferably conform with
the requirements of the MIDI (Musical Instrument Digital Interface)
standard for providing a serial interface to control audio devices.
The teacher can also monitor the activities of individual students
and talk with them by means of switch 1.

      Audio switch 1 contains the logic necessary to decode the data
stream received over digital link cable 7.  A s...