Signal Generator  

The Signal Generator (SigGen) is a useful tool providing a steady test signal to help you align and test a live sound system. Use this page to set up the Signal Generator and route it to one or more mix outputs.

The SigGen routes through the mix master processing, therefore will be affected by the mix EQ and compressor.

Note The Signal Generator is disabled while Talkback is active (Talk key turned on).

To assign the SigGen to mix outputs - Touch a mix button to toggle the assignment on or off.

Level - The generator level can be set from fully off to full scale +18dB. Touch the Mute button to turn the signal off.

Note To avoid sudden noise through accidental routing we recommend you turn the SigGen Level down when you are finished using it.

Signal Type - There are 4 types of signal available:

Sine - A pure tone. Set the frequency using the Frequency box. This can be swept across the full audio spectrum from 20Hz to 20kHz. Often used for equipment gain matching.

White Noise - A signal containing all audio frequencies with equal energy per Hz, a linear curve that sounds lacking in bass to the human ear. Not often used in live sound.

Pink Noise - A signal containing all audio frequencies with equal energy per octave, a logarithmic curve that matches the way the human ear responds. Therefore this is a good source for testing speakers and room response.

Band Pass Noise - Band filtered pink noise centred around the frequency set using the Frequency control.

Using Pink Noise to test the PA

Route Pink Noise to test your stage monitors before sound check to make sure all the HF and LF drivers are working and their level and frequency response is well matched. You can also check if two speakers or their cables are reversed polarity as you will hear an uncomfortable phasing effect as you walk between them. Pink noise is also used as the reference source when analysing speaker response using an RTA.