The following Meeting Settings can be changed while a meeting is in progress through the right click menu of a Zoom input:

Original sound for musicians

This adjusts the audio sent from vMix to the Zoom Meetings as follows:

  1. Reduces noise suppression
  2. Enables stereo
  3. Increases audio quality (via higher bitrate)
  4. Disables echo cancellation

Note: this setting only controls the audio sent from vMix. 
Participants audio is controlled via each participant within their Zoom meeting app directly.