When an audio track is panned hard left or right, the signal that is routed via a Send to a Bus does not reflect the original panning of the track. The signal is always sent as if it was panned to the center. Sends are always routed pre-pan (before the pan pot). Therefore the panning of the audio track does not affect the panning of the Send signal. This does not mean that stereo sends are mono. They carry a real stereo signal, but they don't reflect the panorama setting of the main audio track.
You can modify your routing in order to achieve post-pan sends as follows:
- Route the output of the audio track to a Bus, and use this Bus as the input for an Aux object as shown below in Figure 1. In our example, we route the signal from Audio 1 via Bus 1 to Aux 1 (1).
- Aux objects have their own sends which allow to send the signal to another Bus. Use the Send of the Aux object to send the signal to the Bus where your effect plug-in resides. In our example, we use Bus 10 for the reverb plug-in Space Designer (2).
Figure 1 The routing for post-pan Sends.
As the level meters in the picture show, the panning of the Audio track is now reflected in the send signal from the Aux track to the effect Bus. Please be aware that in this setup the panorama must always be adjusted in the Audio track, not in the Aux track, because the Aux track's Send is again pre-pan.