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  1. #1
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    Oct 2008
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    San Diego
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    PFL (pre-fade listen) button

    Although I've been doing sound for years, it's all been self-taught, learn as you go for me.

    As much (or as little) as I've learned, there are still questions -- including some that are probably very basic -- to which I don't have answers. One of them is this: Does it matter if the PFL button is on or off?

    In other words, when the concert is underway, is there a reason -- one way or the other -- to have the PFL buttons activated or not?

    When depressed, while I'm wearing headphones, I can hear MUCH better --because the signal is louder in the headphones. When OFF, the volume in the room is louder than I can raise the headphone output volume to, making it hard (or impossible) to hear via the phones.

    But I don't know if there's a downside to leaving the PFL buttons engaged.

    Thanks!

  2. #2
    PFL is Pre-Fader Level, if depressed, the meters (and usually headphone and control room outputs) switch to the selected channel as if the fader for the selected channel(s) is at union (0dB adjustment). This is used to set trim/gain levels for inputs and to match levels between inputs if needed (it is also useful for signaling, cuing pre-recorded sources, and to ensure that the mic you're about to turn on is the right one). Setting a PFL on a channel during a show is fine, so long as the audience is hearing from the main output. It will have no effect on the main output, but DO NOT use this to get an idea of the mix, it is not representative of the mix, only use it to check up on things.

    If you aren't hearing the headphones well enough, might I suggest better (noise-canceling mayhaps) headphones and/or a small headphone amplifier and/or a better location for your mixing area.
    Eric Adler (tonsofpcs)
    http://www.videoproductionsupport.com/ Chat at: http://tinyurl.com/vpschat
    Follow me on twitter: @videosupport @eric_adler

  3. #3
    New Member
    Join Date
    Oct 2008
    Location
    San Diego
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    Thanks. I already understand everything you explained, but that wasn't my question.

    My question was whether or not there was a reason TO, or NOT TO, leave the PFL button(s) engaged? Does it make a difference -- in a negative way -- to do one or the other?

    Thanks-

    Carey

    ==================

    Quote
    Quote: tonsofpcs
    View Post
    PFL is Pre-Fader Level, if depressed, the meters (and usually headphone and control room outputs) switch to the selected channel as if the fader for the selected channel(s) is at union (0dB adjustment). This is used to set trim/gain levels for inputs and to match levels between inputs if needed (it is also useful for signaling, cuing pre-recorded sources, and to ensure that the mic you're about to turn on is the right one). Setting a PFL on a channel during a show is fine, so long as the audience is hearing from the main output. It will have no effect on the main output, but DO NOT use this to get an idea of the mix, it is not representative of the mix, only use it to check up on things.

    If you aren't hearing the headphones well enough, might I suggest better (noise-canceling mayhaps) headphones and/or a small headphone amplifier and/or a better location for your mixing area.

  4. #4
    i dont see why you cant have it on

  5. #5
    Quote
    Quote: Carey
    View Post
    My question was whether or not there was a reason TO, or NOT TO, leave the PFL button(s) engaged? Does it make a difference -- in a negative way -- to do one or the other?
    Sorry, I thought I was clearer than it seems I was.
    It is bad to leave PFL engaged as you cannot monitor the final mix. Use PFL when needed, do not use it as an alternative monitoring means because it 'gives a boost', run your levels right and, if still needed, use the right off-board gear.
    Eric Adler (tonsofpcs)
    http://www.videoproductionsupport.com/ Chat at: http://tinyurl.com/vpschat
    Follow me on twitter: @videosupport @eric_adler

  6. #6
    New Member
    Join Date
    Oct 2008
    Location
    San Diego
    Posts
    3
    Thanks for the help!

    carey

  7. #7
    No problem. If you need any further help, you know where to post
    Eric Adler (tonsofpcs)
    http://www.videoproductionsupport.com/ Chat at: http://tinyurl.com/vpschat
    Follow me on twitter: @videosupport @eric_adler

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