Hello Jean, Good to see you back on the Forum.
Further to John's suggestion, if you use the Sound Edit function on the particular voice you wish to add, you may be able to increase the Volume level and then store the 'new' voice in Sound Memory. I often do this when I find a particular instrument is a bit lacking in volume. Select the sound then Program Menu/Sound Edit/Tone and increase the Level setting. If the sound has more than one component, then try to keep the level proportions the same after the increase.


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Willum