The memory footprint of the plugin is around 400 MB. There are 95 built-in presets modeled after classic Hammond Organ drawbar settings and famous songs. A great deal of time was spent experimenting and finding useful drawbar settings and eq combinations, and vacuum tube sims. The plugin also does a fair amount of internal eq and sonic shaping depending on the preset. The voicelist also requires extra processing power, as unlike a piano or other percussive instrument, each note can be sustained indefinitely, and thus newer notes must work around this limitation. Internally the VST is capped at 330 voices, which is equivalent to 15 notes of polyphony. This is because internally each harmonic is being summed for each note - which can include things like percussion and key click - meaning that each note requires upwards of 22 voices. The plugin requires a decent CPU - at least an Intel Core I3. Inside the VST the amp and speaker signals go through preamp/gain staging whether or not the Leslie bypass is engaged. This can be adjusted with the "smoothing" knob, which will attenuate some of the harsher frequencies, and (in version 2.0) the smooth/bright switch and angle knob. The instrument was equalized to sound slightly more aggressive than a typical Hammond organ and therefore has the potential to stand out more in a mix. An extra drawbar has also been added to the organ between the 4th and 5th drawbars (x), equivalent to the 5th harmonic of the sub-fundamental or a 3 1/5' pipe length. Version 2.0 also includes amplifier sims based on vacuum tube simulations and speaker EQ curves. The plugin also includes reverb, braking, variable acceleration, drive/distortion, smoothing, adjustable stereo panning, key-splitting, and preset switching. Percussion was simulated in VST as it is in real life: a higher amplitude, percussive decaying sound is added to the instrument via the 2nd or 3rd harmonic. Some key click can be heard in the original samples but the effect has been exaggerated. Key click was simulated by adding random noise to the attack and release samples. Vibrato scanner is similar to that of a B3 and includes vibrato as well as vibrato+chorus. The Leslie simulation can also be bypassed.ī3 effects where also digitally simulated and these include percussion, vibrato, and key click.
The upper rotor spins between 48/409 RPM's and the bottom rotor spins between 40/354 RPM's. Vibrato, chorus, and panning processing are used to simulate the rotation of the rotors. The signal is split to a virtual bottom rotor and virtual upper rotor at around 600 Hz. The Leslie Speaker simulation was designed to mimic a real Leslie. This was accomplished by using the Organ's pedal tones to add the lower octave notes. The organ's range was augmented to be similar to that of a Hammond B3.