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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.
Olivier
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
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