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Audio Public Address Sound System.

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Mornin' All,

                    I need some advice please.


Imagine a portable sound system as used by travelling musicians, rock guitarists or others with electric instruments. There will be a large mixing desk, and amplifier and speakers. All is well if the musicians with electric instruments only plug their 1/4 inch jack plugs into their instruments when the mixer sliders are down (off) so as not to cause a big pop or bang through the speakers. Sometimes though the jack plugs are unplugged from the instruments when the mixer sliders are up (on) and a terrible sound results from the speakers.


Is there a "magic box" that can be inserted in line with the audio leads from the instruments to the mixer that AUTOMATICALLY prevents this unwanted loud noise problem?


Thanks,


Z.
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  • 0

    davezawadi:

    Of all the questions....

    This  should not really be a problem, but there are a few things which can help:

    1. Use DI boxes with the ground lift activated and balanced inputs.

    2. Set the mixer input gain correctly and use the input compresser / limiter at just above the normal playing level in limit / sharp knee mode

    3. Train the musicians properly so that they don't pull plugs out while performing, and charge them a bottle of something if they do!

    4. Stick any loose cables in place with gaffer tape, or locking clips if fitted.

    5. Be ready to use the channel mutes quickly.


    You may need something a bit more fancy by way of mixer etc. for the above, depending on what you have at present.  However this is all part of the skillset of the "sound guy"


    Happy new year

    David




    Thanks David, I will take your advice onboard. As the "sound guy" is the lead guitarist he is not always fully controlling the mixer, and the musicians are amateurs not professionals, also some are guests and are not properly trained in plugging and unplugging etiquette.  So isn't there an inline idiot proof box that will automatically prevent horrible noises when jack plugs are removed?


    If I am playing my electric violin and I wish to unplug from the main mixer and plug into my own personal combo amp I have no control at my end of things. How can I change over and not make horrible noises through the main speakers? Is there anything that I can do at the instrument end whilst the main mixer fader is up?


    Thanks,


    Z.


     

Reply
  • 0

    davezawadi:

    Of all the questions....

    This  should not really be a problem, but there are a few things which can help:

    1. Use DI boxes with the ground lift activated and balanced inputs.

    2. Set the mixer input gain correctly and use the input compresser / limiter at just above the normal playing level in limit / sharp knee mode

    3. Train the musicians properly so that they don't pull plugs out while performing, and charge them a bottle of something if they do!

    4. Stick any loose cables in place with gaffer tape, or locking clips if fitted.

    5. Be ready to use the channel mutes quickly.


    You may need something a bit more fancy by way of mixer etc. for the above, depending on what you have at present.  However this is all part of the skillset of the "sound guy"


    Happy new year

    David




    Thanks David, I will take your advice onboard. As the "sound guy" is the lead guitarist he is not always fully controlling the mixer, and the musicians are amateurs not professionals, also some are guests and are not properly trained in plugging and unplugging etiquette.  So isn't there an inline idiot proof box that will automatically prevent horrible noises when jack plugs are removed?


    If I am playing my electric violin and I wish to unplug from the main mixer and plug into my own personal combo amp I have no control at my end of things. How can I change over and not make horrible noises through the main speakers? Is there anything that I can do at the instrument end whilst the main mixer fader is up?


    Thanks,


    Z.


     

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