The AMBIENCE fader adjusts the volume of the AMBIENCE function (room ambience, reverb, stereo enhancer). If the volume from the Ambience function is low, you might feel that adjusting the AMBIENCE fader does not change the volume of the ambience sound.
To adjust the reverb component of each instrument, the TD-50 provides a MIC ELEMENT parameter that is optimized for each instrument. MIC ELEMENT can be edited for each instrument in the INSTRUMENT screen. Since the MIC ELEMENT sound is adjusted to the optimal balance for each instrument, the system is designed so that the AMBIENCE fader will not easily disrupt this balance.