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Post by asimmd on Mar 10, 2013 20:41:52 GMT
Hi all
The title says it all.
I thought the question had been asked before,but I can't find it.
Many thanks
Alan
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Post by eltrasero on Mar 11, 2013 8:42:57 GMT
I think the title had one too many last night...
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Post by asimmd on Mar 11, 2013 10:04:10 GMT
Typo now fixed hic hic
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Post by Charlie Hall on Mar 11, 2013 12:43:53 GMT
Hi Alan, Depends a lot on the actual amp or amp sim you are working with, but try the treble less than halfway, mid (if there is one) around halfway, bass to suit the tune and era (less bass for older sound, more bass for newer sound) and the tone balance that suits your guitar, if there is a cut control set it so the high notes are softened but not so much that clarity of low notes is lost, presence (if there is one) usually low or off, bright switch (if there is one) usually off. Regards, Charlie
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Post by asimmd on Mar 11, 2013 15:54:01 GMT
Thanks Charlie that's just what I needed.
Alan
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Post by docwill on Mar 23, 2014 9:07:41 GMT
Hello Charlie; Could you enlighten on what "bright" and "presence" do and why they are necessary with all the tone and eq controls at one's disposal? Thanks, -Bill
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Post by Charlie Hall on Mar 23, 2014 11:13:41 GMT
Hi Bill, Bright switches usually switch in a capacitor that bypasses the volume control pot's input and output, allowing more highs to pass through. The effect is variable depending on the volume control setting and decreases as the control is turned higher until at maximum setting the capacitor does nothing because the pot's input and output are effectively shorted out at that setting. Some amps have a bright capacitor connected all the time without a switch to disconnect it. Presence conrols are more complicated. Not all amps have one, for various reasons. They almost always work in a valve amp's power amp section by controlling the amount of negative feedback, but only at upper mid frequencies and upwards, from the output transformer back to the driver circuit. Valve amps that have no feedback (the Vox AC30 is one, so it cannot have a presence control) distort more gradually when pushed hard. When the presence control is turned fully up the feedback is reduced to nothing at the higher frequencies so the amp's sound when pushed hard is more raw and with more harmonics at those frequencies and above. Note that EQ alone cannot generate harmonics in the same way, it can only control the balance of harmonics that are already in the signal. So even if presence works on similar frequencies to the treble control, the sound by balancing one against the other can vary a lot. There is a lot more to the sound of valve amps than just EQ. Speakers also have a great effect on the sound produced by the amp due to they way they break up, even if they still sound clean at the time. Regards, Charlie
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Post by docwill on Mar 23, 2014 22:12:27 GMT
Thanks Charlie. Got another question gonna dig around for. Amp circuitry and how it relates to sound is bewildering and amazing...
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