Lexicon PCM80/81: By Design? A Bug? User Error?

Discussion in 'The Rack Space' started by ctreitzell, Mar 26, 2020.

  1. ctreitzell

    ctreitzell Member

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    So, rather than put this into my remote control thread; seems like it makes more sense to have something like this separate.

    Question 1:
    When changing delay time on voices from tempo to ms>
    To change ms value by 1ms the encoder requires 2 clicks.
    I will dbl chk, yet I think SysEx is the same (my listener just sees the same message twice...I will have to double check)

    Is it by design? or a bug? User error? or just not finished?
     
    Last edited: Mar 26, 2020
  2. AnalogKid85

    AnalogKid85 Member

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    Check your MasterDelayTime percentage! If it's lower than 100%, it can take more than one click to get to the next ms value (at 10% it takes 10 clicks!).
     
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  3. ctreitzell

    ctreitzell Member

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    oh, my, that will really complicate matters for the remote :confused:
    I doubt MDP2 has logic to cope with this Delay Time Percentageo_O
    What I noticed is the PCM display doesn't alter, there are just more clicks btwn ms...I must investigate this in depth and attempt some kind of workaround

    So, user error on my part as it is by design

    thanks, man, I am grateful :)
    it's incredibly helpful to access to someone who knows these boxes so well
     
  4. ctreitzell

    ctreitzell Member

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    also, I realize now that I have only ever read the PCM81 User Guide...The PCM80 User Guide has more basic info and appears to be required reference for both units...again, very helpful
    Strike that! these two manuals are pretty much identical save for the the expanded algos of the 81
     
    Last edited: Apr 4, 2020
  5. AnalogKid85

    AnalogKid85 Member

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    Could you tell me what parts are different? I've been reading pretty much just the 81's manual for years, simply because the quality of the scans out there are better :D
     
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  6. ctreitzell

    ctreitzell Member

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    Hmmmm, I will have to compare them side by side
    I swear they are slightly different...
     
  7. ctreitzell

    ctreitzell Member

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    I am incorrect @AnalogKid85 ; these manuals are essentially the same content except the layout, font and higher rez gfx as you pointed out
     
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  8. ctreitzell

    ctreitzell Member

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    Oh boy, this Delay Time Master is gonna make matters tricky
    (from the manual):
    The Delay Time Master
    "control allows you to simultaneously change the delay times
    of all voices in the effect. The available range is from 0-200%. This
    provides a simple way to expand or close in all of the voice delay
    times. If a voice's delay time is set to 500ms, changing the setting
    of the Master parameter to 200% will change the delay time to
    1000ms. Setting this parameter to 0% is an easy way to set all the
    delays to 0 from a single control."

    Now, look at this the other way:
    If the Delay Time Master is set to 0%
    and user spins the encoder on any of the V Delays under said master's control:
    values are still being sent

    I will have to add a label
    *precise delay time labels only when Delay Time Master set to 100%
     
  9. ctreitzell

    ctreitzell Member

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    is the feedback master gonna do the same thing?...yes:confused:
     
    Last edited: Apr 12, 2020
  10. AnalogKid85

    AnalogKid85 Member

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    Now you know why I'm like...maybe this whole programming a matrix from the front panel isn't so bad...:D

    I mean, when it comes to menu-driven FX processors, that matrix is pretty well thought-out, wouldn't you say? ;) Easier to visualize than most once you get the hang of it, if you ask me!

    If you must continue your "Pilgrim's Progress" though, I still wish you luck!

    By the way, patching an LFO—or multiple LFOs!—to MasterDelayTime is the key to a LOT of great chorus and flanger FX! You can basically turn your PCM80 into a more-flexible ADA STD-1 (which uses the same proportional-sweep modulation scheme, w/a 6-tap BBD, the MN3011). You can even use a square wave to get the "purest" glide modulation on all the voices at the same time! (though remember to turn Glide Response down if you do that ;) it usually has to be fairly slow to do the "pure glide" stuff).
     
    Last edited: Apr 12, 2020
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  11. ctreitzell

    ctreitzell Member

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    Just the Mod/ Global SysEx parameters alone is a huge help...users can still use the front panel matrix alongside the remote

    patching using the remote? I don't know about that...
     

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