Jk-audio innkeeper LTD Manuel d'utilisateur télécharger pdf (Page 10)

Mix-Minus Explanations

Why do I need a Mix-Minus Setup?

Mix-minus is an audio signal that is designed to avoid feedback and

echo in a conference or telephone interface application. When connect-

ing a phone hybrid to a mixing console, the caller’s audio will be con-

nected to an input channel on the mixer along with all the microphones,

music, etc. All of these inputs combine to create the Master mix to be

sent to your broadcast, recording device, or the speakers of your PA

system. However, if you connect this Master mix to the input of the hy-

brid, you are also sending the caller’s own audio back to the caller.

This completes a feedback loop and creates a strange and annoying

echo. That is why it is important to create a special mix that contains a

mix of all the microphones, music, etc., “Minus” the caller’s audio.

Wireless Phone Interface

Audio Mixer

PA System,

Broadcast,

Podcast, etc.

Mix Plus Caller

Mix Minus Caller

Which Mix-Minus Setup Should I Use?

Most radio stations and recording studios should use the Studio Setup

shown on pages 8-9. Using an Aux Send output that is Post Fader will

keep the audio that is being sent out to the caller tied to the same out-

put you send to your broadcast or PA system. This way your sound

engineer can more easily control each channel. During a station break,

the talent microphones can be muted simply by turning off the output

level knob or slider and their audio will not be sent to the broadcast or

to the caller.

If you have a small studio and you use your wireless phone hybrid to

record interviews, you might consider using the Simple Setup on page

11. When the Aux Send output is Pre Fader, the levels you set on the

Aux Send controls will only affect what the Caller hears, and the levels

you set at the output faders will only affect the recording or broadcast.

If the talent wants to be able to talk to the caller during station breaks,

this is the setup you should use, although the talent would need to con-

nect their headphones to the hybrid instead of to the mixer. You should

also use this setup if you want to be able to send music or sound ef-

fects to the broadcast that the caller will not hear.

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Jk-audio innkeeper LTD Manuel d'utilisateur Page 10