Sony ICD-PX470 Help Manual page 112

You can select one of the following sensitivity levels for recording music.
High(Music): Suitable for recording small-group chorus performances and distant musical instrument sounds.
Medium(Music): Suitable for recording live music from a distance of 1 to 2 meters (40 to 80 inches), such as chorus or
musical instrument lessons.
Low(Music): Suitable for recording live loud music, such as band performances.
Note
While recording audio from an external device is in progress, the Built-In Mic Sensitivity function is turned off.
Related Topic
Selecting the audio input type and the sensitivity level of the external microphone (Ext. Input Setting)
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