Feedback / Microphone: Difference between revisions

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m Reverted edits by ST (Talk); changed back to last version by DanCornett
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* If you are using the {{T1}}, the principles are the same as shown on the video: simply substitute the [[T1_ToneMatch%C2%AE_Audio_Engine#Set_Input_Trim|trim]] on the {{T1r}} for the trim on the Classic or Model I. {{T1 icon}}
* If you are using the {{T1}}, the principles are the same as shown on the video: simply substitute the [[T1_ToneMatch%C2%AE_Audio_Engine#Set_Input_Trim|trim]] on the {{T1r}} for the trim on the Classic or Model I. {{T1 icon}}
The colors on the T1® are a little different because the T1® trim uses 3 colors. You want to have a good solid green signal with occasional flickers of yellow.
[[Image:TrimlightsOK.gif]]
If you are seeing flickers of red, turn down the trim.
[[Image:TrimlightsNo.gif]]




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=== Effects ===
=== Effects ===
If you are using vocal effects like compression, reverb, chorus or delay, turn them off until you can get sufficient [[Gain Before Feedback|gain before feedback]] to get performance level volume. Then add the effects back into the signal chain (one at a time) so you can be aware of the individual impacts that each effect is having on feedback.
If you are using vocal effects like reverb, chorus or delay, turn them off until you can get sufficient [[Gain Before Feedback|gain before feedback]] to get performance level volume. Then add the effects back into the signal chain (one at a time) so you can be aware of the individual impacts that each effect is having on feedback.


=== Open Microphones ===
=== Open Microphones ===
Use as few open microphones as possible. When a microphone is not in use, if possible, turn it off. If you have a {{t1}} consider using the [[T1_ToneMatch®_Audio_Engine_/_Tips_%26_Tricks#Feedback:_Comp_Gate_.2F_Noise_Gate|noise gate]] to do this automatically.  
Use as few open microphones as possible. When a microphone is not in use, if possible, turn it off. If you have a {{t1}} consider using the [[T1_ToneMatch®_Audio_Engine_/_Tips_%26_Tricks#Feedback:_Comp_Gate_.2F_Noise_Gate|noise gate]] to do this automatically.
 
:Gain-before-feedback decreases by 3dB every time the number of open (active) microphones doubles. ... This is why the number of microphones should be kept to a minimum and why unused microphones should be turned off or attenuated. — Source [http://cdn.shure.com/publication/upload/838/microphone_techniques_for_live_sound_reinforcement_english.pdf Microphones Techniques for Live Sound Reinforcement] page 20


=== EQ and Tone Controls ===
=== EQ and Tone Controls ===
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=== Distance Between Microphones ===
=== Distance Between Microphones ===
Another (low priority) design guide-line could be to keep open microphones as far apart as possible. Neighboring systems with open microphones can mutually decrease [[Gain Before Feedback|gain before feedback]].
Another (low priority) design guide-line could be to keep open microphones as far apart as possible. Neighboring systems with open microphones can mutually decrease [[Gain Before Feedback|gain before feedback]].


== Techniques specific to the {{L1 family}} ==
== Techniques specific to the {{L1 family}} ==
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[[Image:MicGoodBad.gif]]
[[Image:MicGoodBad.gif]]


=== Use the {{T1}} Comp Gate to mute the microphone ===
=== Use the T1® Comp Gate to mute the microphone ===


{{:Feedback / T1 ToneMatch® Audio Engine / Comp Gate}}
{{:Feedback / T1 ToneMatch® Audio Engine / Comp Gate}}


=== Use the {{T1}} ParaEQ to notch out a problem frequency ===


=== Use the T1® ParaEQ to "Notch out" a problem frequency ===
Sometimes the geometry and configuration of the mic(s) will cause one particular frequency to be reinforced more than all the others, relatively independent of the positioning of the microphone.  By identifying that particular frequency, one can use the T1® to reduce ("notch out") just that one particular "problem" frequency.
{{:Feedback / T1 ToneMatch® Audio Engine}}
{{:Feedback / T1 ToneMatch® Audio Engine}}


== Does Microphone Sensitivity Affect Feedback? ==
== Does Microphone Sensitivity Affect Feedback? ==
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== Picking a Microphone ==
== Picking a Microphone ==
For the best feedback performance, choose a directional microphone that has a ToneMatch preset.
For the best feedback performance, choose a directional microphone that has a ToneMatch preset.
== Feedback Destroyers ==
{{:Feedback Destroyers}}