Ramsey Electronics Phone Patch Mixer Kit PPM3 Especificaciones descargar pdf (Pagina 5)

tape recorder, a microphone, a CD player or any other sound device. Today such an interface is

basically a built-in feature in most of today’s PC motherboards or the more professional one’s are

installed as a PCI card in the computer or could in some cases be a small box with a number of

sockets for earphones, microphones etc. Prices vary but good quality in/external sound cards can be

found at prices from 100-150 US$.

Fig. 1: Mobil Pre interface (sound card) from M-Audio seen from the front and the back

Basically the sound card turns the sounds into a computer file, and there are several different

formats for sound files depending on the quality needed. In the normal music CD format, one disc

can contain 10-12 songs – but if they are compressed to the MP3 format, a disc of the same size can

contain up to 100 songs. Naturally, the smaller files do not have as many details, but even a trained

music producer will find it difficult to hear any difference between the two formats. And smaller

files are easier for the computer to handle, and it is easier to exchange programme material via the

Internet. If programmes are compressed well, it only takes a few minutes to send even half-hour

programmes to anywhere in the World.

If one wants more than just a couple of

sound sources to be connected to the

computer at the same time, it is necessary to

have a mixer. In principle it is possible to

use the digital facilities in the editing

software in the computer to turn sound up

and down or to change the balance between

treble and bass etc.

It is, however, still more practical to have a

physical mixer, and they come in numerous

types, shapes and sizes. Some are better for

music production than for radio, but most

mixers would work fine. When choosing a

mixer one should just make sure that there is

a sensible relation between the price, the

quality and the needs of the station.

Clearly a station with 24-hour broadcast and

many different operators would need a more

robust type than a small community station

with less complicated productions.

Fig.2: Yamaha MG 12/4 mixer seen from back and front

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Ramsey Electronics Phone Patch Mixer Kit PPM3 Especificaciones Pagina 5