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Re: Rép : EBow - active/passive humbuckers

Title: Re: Rép : EBow - active/passive humbuckers
At 11:03 AM +0100 11/6/13, In Mobile wrote:
Hi Charles

I beg to differ.

Pick up have a wild effect on E-bow operation, and I do use this effect.
The closer you get to the magnetic field of the pick the higher the clipping gets, and you can bring in a kind of white noise.

Not true.  Correlation does not imply causation.  The ebow isn't changing it's response,  frequency response of the pickup changes as you go from off axis to on axis. The sound is much "brighter" when you're over the poles. You can prove this by rotating a pickup away from the string, the tone gets duller.  The ebow generates a lot of harmonics due to the clipping of the internal amplifier and the low inductance of the drive coil.

This is besides the condition sine qua non for speed sweeping arpegios (Frank Gambale without the right hand) on all strings with the E-bow.
You can't do arpeggios anywhere else than just more or less on the pole pieces (anyway I can't really, I doesn't really catch) , if you don't have prior distortion on the guitar (i.e. using a clean sound).

Also false.  The "sweep arpeggio bowing" effect simply relies on the internal distortion of the ebow amplifying the slight vibration of the string and the motion of the ebow over the poles (causing the same brightening effect mentioned above), the strings are not excited by the ebow in this case, but by tapping with the left hand.

Bringing noise content by passing on the pole pieces of the pick up I use also to make kind of small percussive ryhthm to loop (well percussive is probably to much for describing it but you get the point).

So the conclusion is, no matter the pup, the E-bow will indeed operate provided the strings have paramagnetic content.
BUT the proper pup will open more possibilities.

Now for the active pup.
I got rid of all mine to be back to passive so I can offer nothing but mere thinking.
I don't know for sure for magnets (weaker or not) but there is less inductance on active pup (i.e. weaker output sound) which requires onboard ('on pup') pre amp.

My take is that it reduces the interactions with  the puck up. It will work perfectly with Ebow (or sustainers) BUT probably won't be able to make all the wild stuff I discussed above.

My 2 cents though.


De : Charles Zwicky <cazwicky@earthlink.net>
Objet : Rép : EBow - active/passive humbuckers
Date : 6 novembre 2013 00:07:05 HNEC
À : Loopers-Delight@loopers-delight.com

The pickups on the guitar have no effect on an ebow's operation, 
once you understand how an ebow works you'll see why that is. 
Inside an ebow there is a small coil of wire with a magnetic core and 
a permanent magnet, in other words a single string pickup, which is 
connected to a small amplifier which drives a second coil. The 
principal is electromagnetic feedback.  This first coil picks up the 
vibration of the string, amplifies it and the second coil creates and 
electromagnetic field that excites the string.    The amplifier is 
driven into clipping, and this clipping is clearly audible if you 
position the driver coil over your guitar's pickup.   The pickup on 
the guitar has no influence on the efficiency of the ebow circuit, 
and  in fact it will even work on acoustic instruments, provided that 
the strings are steel or nickel or any other magnetic material.

-Chuck Zwicky