Rotary

By emitting the sound via a rotating horn and drum, the rotary speaker produces a Doppler effect that thickens the sound. The horn and drum rotate at variable speed producing different amounts of Doppler effect. The amplifier of the rotary speaker adds a warm sounding distortion, and the horn, drum, and cabinet color the sound uniquely. The horn and drum are recorded via (virtual) microphones that can be set to different angles to broaden the sound image. Typically, rotary speakers are used with electric organs.

Rotation

This parameter changes the rotation speed of the horn and drum. When set to Fast, the Doppler effect is stronger. When set to Stop, there is no Doppler effect because the drum and horn do not rotate. Because the horn and drum accelerate and decelerate at different speeds, the transition from Slow to Fast and vice versa sounds the most interesting.

Distance

Sets the distance between the microphones and the horn and drum. The amplitude modulation of the sound decreases with the distance of the microphones. Set this to higher values for less amplitude modulation.

Cabinet

The horn and drum sound different when recorded through the louvers of the cabinet. Use this to color the horn and drum with the sound of the cabinet. At a setting of 100 %, you get the full sound of the cabinet.

Balance

Here you adjust the balance between the horn and drum microphones. At a setting of 0 %, you hear only the drum. At a setting of 100 %, you hear only the horn.

Slow

Adjusts the slow speed of the horn and drum together.

Fast

Adjusts the fast speed of the horn and drum together.

Accel

Adjusts the acceleration time for raising and lowering the rotation speed of the horn and drum.

Horn Mic Angle

This adjusts the stereo spread of the horn microphones. At a setting of 0°, the sound image is monophonic. At a setting of 180°, the sound image is fully stereo.

Drum Mic Angle

This adjusts the stereo spread of the drum microphones. At a setting of 0°, the sound image is monophonic. At a setting of 180°, the sound image is fully stereo.

Input

Adjusts the gain before the rotary and drive.

Drive

Adjusts the distortion of the amplifier.

Output

Adjusts the gain after the rotary and drive.

Color

Alters the sound of the Rotary effect by changing the timbre, which leads to the rotation of the horn and the drum being perceived with greater depth.

Bass

Adjusts the tone color of the low frequencies.

Treble

Adjusts the tone color of the high frequencies.