Taking A Look At The
Expression Crossfade Feature
Workshop Introduced - By Ken
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information is available, or contributed from members.
Latest Additions to this Workshop
'Lower Manuals and Pedals'
The "Expression Crossfade"
feature was first incorporated into the OAS system with Version
5. It is a very useful feature particularly when playing
orchestral combinations or Jazz music. Regrettably, it is not
available for the Pegasus Wing as yet.
The feature does not operate with the OX7
drawbars or the Wersi drawbars. Basically it is for use with the
long wave sounds. However it can also be used with some imported
In its basic form, the
'Expression Crossfade' feature allows us to fade from a sound
such as Piano on Upper Manual 'Level one', to a different sound
such as strings on 'Level 2,3,or 4' by use of the
In its extreme 'crossfade'
position, the Piano would sound only when the Volume pedal was
in the 'Back' position, and by pushing the Volume pedal
'Forward', the Piano fades out and only the String sound is
heard. This can be a very useful feature as it can be used
on all Manual sound Levels.
If you look at the picture
of the 'Selectors Advanced' page below and check the
Expr.Pedal settings you will see that the standard factory
setting is 100 This applies to all manuals and Pedals so
please ignore the settings I have in the lower and Pedal
sections for the moment.
You will note that Upper
2,3 & 4 are as the factory 'standard' setting 100 whereas Upper 1
is set to - 100 This is what I refer to as the
'extreme' Crossfade setting. Upper 1 sounds only when the Volume
Pedal is in the back position. Upper 2,3,& 4 sound when the
Pedal is pushed forward
Just to give an idea of how
this feature sounds in its extreme position, here is a short
Demo of my interpretation of the 'Cuckoo Waltz. The Cuckoo
'calls' on the off position of the Volume pedal,
Push it full on, the Cuckoo fades and the German Accordion
Note: Any Demos I
personally attach to this workshop will only consist of 'one
preset' of which I hope will help to demonstrate the sound
variations that can be achieved with this feature within just
one preset on the 'Upper manual'. Later, I
will incorporate it also into other manuals.
How It Works in practice
In an attempt to explain how 'Expression
Crossfade' works and can be used to good effect, I have made
this line drawing of the possible parameter range of the Expr.
Pedal settings (on the Selectors Advanced page) for the four Upper sound levels.
They were made for a preset that I use for some folk music. The
graph shows the instruments selected, and the Expr.
Pedal values they are set at. Also the individual instrument
volume levels are shown which can be set at the same time
(from the Selectors page).
------ If instruments are set at
the STD 100 value, sounds on the related levels
operate normally. Louder when pushed forward, quieter in the
instruments are set at the value 0 the related sound on the level
will be constant between 100 and
-100 with no fade effect
when the pedal is operated
If instruments are set to the
-100 value, the
related sound on the level fades in on the back pedal position, and fades
out when pushed forward.
Guitar -1 Vocal 1 Atlantis Organ
70 100 40
Adjust to suit your preference)
Lets then explain how the
sounds and Exp. Crossfade values for this preset operate.
Upper 1 Is a Harmonica that is used
for counter melody or fill ins. Its Exp.Crossfade value is 98
and sounds only when the pedal is in the back position.
Upper 2 Is Strat Guitar
is the lead instrument. Its Exp.Crossfade value is 60.
This sounds from about the middle to full pedal position.
Upper 3 Is Vocal 1.
It is turned off, and only sounds when WersiChord is
triggered with the right hand foot switch. It is set
at the STD 100 position, so sounds soft and loud when the
pedal is operated as normal.
Upper 4 Is the
Its Exp.Crossfade value is set at 40. This provides a backing
sound for all the other instruments. It is almost a constant
sound except that the value 40 makes it slightly softer
for the Harmonica sound in the pedals back position. Push the
pedal forward and the sound increases slightly.
(if you do not have the Atlantis sound, use another organ
preset sound that is not to dominant)
(Played on Upper Manual only)
It is appreciated by myself
that many would not like
the way this preset works. As an instance, most would use
the lower manual to play the Harmonica sections, but using it on
the upper manual with 'crossfade' is just a way that suits me
It is also appreciated that
if you use the Volume Pedal to play in the conventional
'Organ Style' ie. Pedal in back position, no sound, pushed
forward full volume, to have sound when the pedal is in the back
position may seem to be a little 'alien'.
However, as we are aware,
the Wersi instrument is more than just an organ, it is a full
orchestra, and when used with the 'Exp. Crossfade' feature, it
can transform your orchestral and Big band combinations from
playing just a solo instrument through to the full orchestra on
one preset without necessarily having to touch a switch, as it
is all controlled by the Exp. Pedal.
Latest Update 22/1/13
Making Adjustments to
the Lower Manuals And Pedals when using Expression Crossfade
So far we have only dealt
with using this feature on the Upper Manuals, and if you have
tried the settings above you are probably questioning the lack
of volume from the Lower Manual and Pedals. So lets now put it
altogether so it operates correctly on all manuals and Pedals.
If you are a 'Style Player'
(using the auto ACC) such as myself, it is only really
necessary to make adjustments to the Lower Manual Exp. Pedal
Values, so as the volume is not totally lost when the Volume
Pedal is in the back position. However, as most use pedals
as well, adjustments need to be made to the Foot Pedal Exp. Pedal
Values also so the Pedal volume is not completely lost when the
volume pedal in the
Setting the Pedal and Lower
Manual values to approx. 40 or 50 as shown below, allows them to
sound when the Volume Pedal is in the back position, with an
increase in volume when the pedal is pushed forward. It is
of course then necessary to adjusted the volume levels for the
sounds as desired.
The preset I have used in this example uses a 'Big
band' Style and the selector screen below shows the Volumes and
Panorama settings that I have used in conjunction with the
Expression Crossfade values.
Note: The Volume level of 64 for Ped. 1 is the volume level set for use with the Foot Pedals.
When Auto Bass is used in the accompaniment, the bass value is
usually higher. Exp.Crossfade can be used with the Pedals also but I
have no experience on using the feature on the pedals.
However, if any member has used it on Pedals to good effect then
please feel free to add your experiences to this workshop.
The screens below shows the instruments used
for a downloadable
demo preset of 'Big Band Crossfade' that you may
wish to try. It is of no particular 'Big Band' or
song, just a selection of different
instruments applied to all the manual levels to demonstrate the
possibilities of the crossfade effect. I personally like to
play crossfade presets without making any changes to the manual
switches apart from triggering WersiChord when needed leaving
all the variations to the Expression Pedal. However with
this particular preset I do turn off the Upper 2 sound 'Jazz
Trombone' at points when I like to include the familiar 'Miller Sound'.
Some other settings on the Selectors
You will note that the 'reset Controllers'
box is unchecked, this prevents any changes to the octaves from
being reset to standard when loading or changing the sounds.
Also the Lower 'Split Point' is set to G2. This is just my own
preferred position for playing. If you play in the more
conventional organ style you may need to alter the split point
to suit. Also, the sound on the Lower one manual will need
lowering by 1 octave.
Preset Demo Download
How each manual is set to work.
Upper 1 'Clarinet Swing' sounds in
the Exp, Pedals back position and fades when pushed forward.
Used as a solo instrument.
Upper 2 'Jazz Trombone' fades in
about the half way position and becomes a lead instrument.
(turned off when the 'Miller Sound' is required)
Upper 3 'Alto Sax MF' fades in
at the full on position and is enhanced with Wersichord BB Reeds
when required for the 'Miller sound'.
Upper 4 'Big Band Brass Soft' also
sounds at the pedals full on position which is more prominent
when the Wersichord is not in use on the Upper 3 manual.
As you will be aware, the lower manual can
be used in two variations when it is split, ie. 1 2 + 3 or
1 + 2 3 In the case of the preset used the 1 + 2 3 variation is
Lower 1 'BigBand Brass Soft'
is used as a single sound for playing the chords etc.
Lower 2 'Sax Section 2' can sound
as a solo instrument with the Exp. Pedal in the back position
but also intermingles with the Lower 3 sound when pushed
Lower 3 'BigBand Brass Soft'
crossfades over the Miller sax which can still be heard.
Expression Crossfade can also be
used with the 1 2 +3 variation to good effect although I have
not used it myself. So again, if any member has used it to good
effect, please join in with the workshop.
This of course applies to anyone that uses
the feature and would like to add content or comments from your
own experiences and uses of the feature, please send in, we would like to hear from you.