![]() It’s important to recognize that the main mix is an audio buss. If the fader isn’t assigned anywhere, it won’t be routed anywhere and won’t be present in the mix. You’ll likely find additional buttons to assign channels to various subgroups. On analog consoles, this can almost always be found near each fader, probably labeled “L” and “R” for left and right. On medium-sized or larger format analog consoles, and on pretty much any digital console, each channel must be assigned to the main mix. On very small analog consoles, input channels are often automatically routed to the main mix. ![]() Of course, sometimes additional speakers are used to fill other parts of the room. The left side goes to the left speakers and the right side goes to the right speakers. Left and right are separate channels that have two discrete busses and two separate outputs on the console. This is the FOH mixer’s focus during the show. It’s a critical filter for the music being played on stage. The main left/right mix, which, just for the sake of simplicity, I’ll call the main mix, is what the audience hears. PFL can also be used to pre-hear an Outside Source to check it is “safe” to fade up or to hear a response to a question asked over a Talkback or Cue circuit.Let’s break down three important kinds of mixer outputs: main mix, aux sends and the matrix mixer. It is primarily a broadcasting function, allowing the operator to adjust the channel input gain control, and the equaliser, if necessary, so that a signal which has not been heard during the rehearsal will be at approximately the correct level and of acceptable quality when faded up into the mix ‘on air’. PFL is used to check the level and quality of a signal before adding it to the mix by ‘fading it up’. ![]() Stereo PFL also meant additional cost, and was therefore regarded as rather a luxury for some years, with most stereo mixers having a mono PFL bus which used a derived mono feed from any stereo channels. In an analogue stereo mixer, the signal in a mono channel does not become ‘stereo’ until after the panpot, which is usually after the fader if the panpot is before the fader a stereo fader must be used, which adds to the cost. ![]() Some mixers have a dedicated meter for PFL which is only active when PFL is selected. If the mixer is fitted with meters wired to follow the output of the monitor module, these will show the level of the pre-fader signal. is being used) and also on the mixer headphone output, but may not appear on the main monitor loudspeakers until ‘PFL to LS’ is selected. PFL always appears on this loudspeaker (unless Rev. Some mixers have a small integral loudspeaker which is dedicated to PFL (or sometimes shared with Reverse Talkback which over-rides PFL via an electronic switch). This triggers an electronic switch in the monitor module, selecting the output of the PFL bus to the monitor path whenever PFL is selected on a channel. On some early mixers the PFL had to be selected by a switch on the monitor module automatic PFL switching is now almost universal, effected by an additional bus carrying a logic voltage activated by the channel PFL switch. This bus is picked up in the monitor module and made available as an alternative signal to the mixer output. On an analogue mixer with PFL, each channel has a switch which can connect the channel signal path, at a point just before the fader, to the pre-fade bus. PFL is a combined channel and monitoring function. PFL usually stands for “Pre-Fader Listen”.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |