Doppler

Doppler allows you to emulate the physical characteristics that occur if a sound source, for example, the siren of an ambulance car, is passing by.

The pitch of a sound source increases when moving towards the listener, changes when passing by, and decreases when moving away. The effect is determined by several parameters. Most important is the speed of the sound source: the faster the sound source moves the higher the changes of pitch and volume. Depending on the distance between the sound source and the listener, frequencies with lower energy are more strongly absorbed by the air than frequencies with higher energy, and the volume changes.

Doppler allows you to emulate this effect. You can set the range and the amount of pitch change, the direction of the movement, and the panorama range. Furthermore, you can adjust the distance between the listener and the sound source, and between the listener and the start/end of the movement.

Doppler offers two different modes:

• In Automatic mode, the movement of the sound source is created automatically.

  This mode is recommended for offline processing. If your audio track contains more than one event between start and end position of the movement, you must bounce these events to one continuous event before adding Doppler as offline process.

  Alternatively, you can load the plug-in as an insert effect and use automation to record the movement. In this case, you must switch to Manual mode when reading the automation to assure a correct reproduction.

• In Manual mode, you can move the sound source manually.

  If you use this mode, you must load the plug-in as an insert effect and use automation to record the movement.

  Note

  Manual mode is not suited for offline processing.