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For me personally, an instant buy: the new AcousticSamples B5Hammond-emulation. Different from just about anything else currently available (including the very good GS VB-3) in that the AS B5 uses sample based synthesis: they sampled each of the 91 tones and then measured and meticulously reproduced everything, the key contacts, the resistance wires, the foldback, the drawbars, the swell pedal, the percussion, and every button available on the original machine. (Detailed info about this on the product page.)
Other features:
Rotary Speaker Simulation: An organ without its rotary speaker isn't an organ. AcousticSamples provided UVI with very detailed measurements and they created an incredible physical model.
Advanced percussion system: AS recreated the whole percussion system and you can customize every aspect of it.
Real key contact modeling: 9 contacts are made one after another under each key and each of them produce a small click, making this the only influence of the velocity and resulting in a different click sound each time you press your key.
All three keyboards: On a real organ, there are 3 keyboards, two of which are almost identical except for the percussion system, and the bass pedals. You can choose to use 3 different MIDI channels, one for each keyboard or you can use the split to have all three one one keyboard.
Presets: There are around 200 drawbar presets that you can load, save, delete or assign to the preset keys (upper and lower), and these include the most used Jazz, Gospel and classical presets.
Organ modifications: Every organ player likes to tweak his instrument, so every modification that organists can do is available.
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The B-5 Organ is using the latest features of the UVI engine, and UVI Workstation 2.6.5 is required to use it.
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