What does mixer pfl mean?

The mixer pfl is the monitor button. Press the PFL button to hear the sound of this channel on the headphone monitor; and SUB is the group button. Press the button of that channel and push up the mixer at the same time. SUB fader, then the sound of this channel will be output from SUB.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

PFL is the monitoring button. After pressing the PFL button, you can hear the sound of this channel on the headphone monitor. SUB is a group button. Press the button of that channel and at the same time push up the SUB fader on your mixer, then the sound of your channel will be output from the SUB. The premise is that your SUB must be connected to the amplifier.

According to your situation, the device you are using is only connected to the MAIN main output and not the SUB, so the SUB button is of little use to you.

Extended information:

Main functions of the mixer:

The first function is to amplify the program signal. When signals from various program sources enter the mixer, the amount of amplification required for different signals is also different, so the mixer must be able to process different signals respectively. For example, the music signals of various musical instruments and the vocal signals are different in amplitude, and of course they need to be processed separately.

The second function is to adjust the frequency (i.e., tune) of various signals respectively. We know that different signals form different timbres due to their spectral distribution, harmonic components and other reasons, and the impact of buildings on the sound causes great changes in the timbre.

The sound engineer must process different sound signals entering the mixer according to different amplification environments to make the sound as close as possible to the original sound. Each channel of the mixer has the same processing methods, such as 3-band equalization, gain controller, high-pass filter, etc.

The third function is the merging of signals. After the mixer adjusts the various signals, it must combine the various signals into standard left and right channels (stereo) and output them as input signals for the next-level equipment. This is the most basic function.

The fourth function is the allocation function. In addition to the main stereo output, the mixer can also provide more than two auxiliary output signals. These signals have two uses. One is for audio room monitoring or stage monitors; the other is for excitation signals for effectors.

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