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Junior Varsity
System tuning with minimal tools (and skills)
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<blockquote data-quote="Ivan Beaver" data-source="post: 67906" data-attributes="member: 30"><p>Re: System tuning with minimal tools (and skills)</p><p></p><p></p><p>To be honest-I can't think a single alignment I have ever done-in which I "calibrated" my measurement rig.</p><p></p><p>I really don't see a need for it. After all-what I am concerned with is the DIFFERENCE between seat to seat (relative level)-NOT what the absolute level is.</p><p></p><p>I totally agree that an RTA is pretty much worthless in sound system alignment. </p><p></p><p>BUT there are times in which is comes in very handy. Such as rooms that have a long reverb time. I use it (much better than a dual transfer or swept freq) to excite the room, then mute the audio and watch the display (with a fast decay time) die away. If there is one freq area that really stands out (in most rooms there is-not a well designed concert hall for example). Then I put a dip in the response around that area and re test.</p><p></p><p>Yes when you measure this with a dual FFT or swept type measurement, you will see the "hole". However when you listen to it with music or speech, the room will not get as "excited" at those freq, and since they tend to hang around longer-now they are less of an obvious "issue". Of course you have to play with it a bit to get it where you need it-which is a compromise between flat response and long reverb time.</p><p></p><p>Yes this can change when the room is full of people-something else that needs to be considered. Don't chase "perfection" in a empty room of that type.</p></blockquote><p></p>
[QUOTE="Ivan Beaver, post: 67906, member: 30"] Re: System tuning with minimal tools (and skills) To be honest-I can't think a single alignment I have ever done-in which I "calibrated" my measurement rig. I really don't see a need for it. After all-what I am concerned with is the DIFFERENCE between seat to seat (relative level)-NOT what the absolute level is. I totally agree that an RTA is pretty much worthless in sound system alignment. BUT there are times in which is comes in very handy. Such as rooms that have a long reverb time. I use it (much better than a dual transfer or swept freq) to excite the room, then mute the audio and watch the display (with a fast decay time) die away. If there is one freq area that really stands out (in most rooms there is-not a well designed concert hall for example). Then I put a dip in the response around that area and re test. Yes when you measure this with a dual FFT or swept type measurement, you will see the "hole". However when you listen to it with music or speech, the room will not get as "excited" at those freq, and since they tend to hang around longer-now they are less of an obvious "issue". Of course you have to play with it a bit to get it where you need it-which is a compromise between flat response and long reverb time. Yes this can change when the room is full of people-something else that needs to be considered. Don't chase "perfection" in a empty room of that type. [/QUOTE]
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System tuning with minimal tools (and skills)
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