Line switch for PC sound card

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< Audio Frequency Electronic ~ Line switch for PC sound card

eric

Posted: Thu Oct 05, 2006 2:37 am Post subject: Line switch for PC sound card

Site Admin Joined: 01 Jan 1970 Posts: 311

Design: T. Giesberts
With the equipment that is found in the domestic
or office environment, the distinction between
the various disciplines is becoming increasingly
blurred. The stereo, television set and video
recorder have long since been merged into a single
audiovisual installation, and there are signs of
the same sort of process with the computer. Formerly,
this consisted of just a main enclosure, a
monitor and a keyboard, but nowadays it is being
surrounded by a steadily increasing number of
peripheral devices, and it is in a manner of speaking
growing in the direction of the audiovisual
installation. The same effect can be seen in the application realm.
In addition to the classical applications, the computer is being used
more and more for digital audio.
Anyone who for example spends a lot of time with sampling and
making his or her own CDs, soon finds that the single input connector
of the sound card is insufficient to deal with a large number
of audio sources. A cassette deck, MiniDisk player, phonograph,
microphone — in principle, all of these can be connected,
although the phonograph and the microphone naturally require
special preamplifiers.
If you want to avoid the inconvenience of disconnecting and reconnecting
cables, the only solution is to use a line switch box. Such a
box is not at all complicated in the electronic sense, as can be seen
from the schematic diagram. A handful of 3.5-mm jacks and a sixposition,
two-pole rotary switch are all that you need.

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