C o p y r i g h t b y U h l - I n s t r u m e n t s M a n u a l
Seite 5
Introduction
Thank you very much for choosing an Uhl-Instruments X4 V-1 or X4 V-2. You have obtained a state-of-the-art
model of a vintage organ. We recommend that you read the entire manual carefully to take full advantage of all
the functions of your new Uhl-Instruments X4 V. Please keep this manual for later reference. We also
recommend you to keep all packaging to protect the instrument if transporting is required.
X4 V-1 and X4 V-2 have identical connection jacks and controls. Hence both models are referred to
under the name X4 V in the following.
X4 V Overview
The HOAX sound engine of the Uhl-Instruments X4 V organs fully matches the vintage electromagnetic organ
sound, including rotary cabinet, spring reverb and pedal sustain. This sound engine features completely new
principles of electronic sound generation. An exact physical model of the famous vintage organ delivers the
most authentic organ voices imaginable. It doesn't use computers, signal processors, sample players or analog
electronics. Instead, the layout of vintage organs has been transferred to a detailed physical model. HOAX does
not emulate the sound; it rather
creates
the sound in real-time – just like real magnetic wheels.
The percussion has that gorgeous round wooden "clonk" (remember "Child in Time"?). The smacking produced
by the tone generator gets under your skin, especially in connection with percussion on. We recreated even the
smallest details of the finest sounding vintage organs. No computers, no samples and no DSPs are used to
comprehensively mimic all the characteristic sound details. To take a single example: the Chorus/Vibrato can't
be distinguished. No wobbling! Switch it on and enjoy that silky C/V shimmer, long-desired by clonewheel
players.
The innovative sound generation boast a great number of advantages: there is absolutely no perceivable key-to-
audio latency since the 91 magnetic wheels are continuously running, just like in a magnetic wheel generator.
Polyphony is unlimited. No lost notes, even if all keys are pressed simultaneously. And the total absence of
unwanted phase relations between the magnetic wheels makes the sound of the Uhl-Instruments X4 V so
incredibly lively and natural.
All the sought after „shortcomings“were taken over as well:
Leakage /crosstalk, magnetic wheel slip and flutter, harmonic distortion and output voltages of pickups and
filters - and of course the typical „keyclick". The X4 V keyclick is not just an added noise signal. It is dynamically
produced by random "chatter“of key contacts, dependent on key velocity. Other features are: Chorus/Vibrato
based on a digitally recreated LC delay line, Percussion in all variations, foldback and precise tapering. Drawbar
response is immediate and responsive, just like a vintage organ.
Warning! Playing an Uhl X4 V organ is highly addictive!
