# Changing Voice Quality

Six speaker-definition options control aspects of the output of the larynx, which, in turn, control voice quality. Click on an option listed below for a description of its characteristics:

Description | Option Code
Breathiness, in decibels | br
Lax breathiness, in % | lx
Smoothness, in % | sm
Richness, in % | ri
Number of fixed samples of open glottis | nf
Laryngealization, in % | la

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