Lexmark CX727
The speaker volume will reset to default value after the session is logged out, when the printer wakes from Sleep or Hibernate mode, or after a power‑on reset.
From the control panel, navigate to:
Settings > Device > Preferences > Audio Feedback
Select the volume.
Note: If Quiet Mode is enabled, then audible alerts are turned off.
Know when the printer receives incoming fax messages by configuring the fax speaker mode and volume.
Use the fax darkness setting of your printer to fine-tune image and text quality.