Where is the best place to return time-based effects if the console is equipped for this?

Returning time-based effects through stereo channels is optimal because this setup allows for precise control over the effects in the mix. Stereo channels typically provide panning capabilities, essential for positioning the effect in the stereo field, adding depth and spatial quality to the sound. This enhances the overall auditory experience and helps integrate effects such as reverb or delays more seamlessly into the full mix.

When using stereo channels for time-based effects, you can take advantage of the console's bus system, allowing for effective signal routing and processing. This routing can also include the necessary EQ adjustments to blend the effects smoothly with the dry signal, ensuring that the effects add to the overall sound rather than overwhelm it.

Other options, like returning to main outputs, aux returns, or channel inputs, do not provide the same level of control and integration for time-based effects. Main outputs are used for the final mix rather than for processing effects. Aux returns can sometimes provide suitable options for returning effects, but they might limit the ability to manipulate the effect's stereo image. Channel inputs are typically reserved for direct audio sources rather than effect returns, making stereo channels the most effective option for this application.