Yamaha P-515 P-515 Owners Manual - Page 16
Setting the Volume — [MASTER VOLUME], Using Headphones, Intelligent Acoustic Control IAC
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Getting Started - Playing the Keyboard Setting the Volume - [MASTER VOLUME] To adjust the volume, use the [MASTER VOLUME] slider located at the right of the panel. Play the keyboard to actually produce sound while you adjust the volume. Decreases the level. Increases the level. Master Volume: The volume level of the entire keyboard sound. Adjusting the [MASTER VOLUME] slider also affects the output level of the [PHONES] jacks and the output level of the AUX OUT jacks. CAUTION Do not use the instrument at a high volume level for a long period of time, or your hearing may be damaged. Intelligent Acoustic Control (IAC) IAC is a function which automatically adjusts and controls the sound quality according to the overall volume of the instrument. Even when the volume is low, it permits both low sounds and high sounds to be clearly heard. IAC Control is effective only from the sound output of the instrument speakers. You can set the IAC setting On or Off via the "System" menu display (page 99): Press the [FUNCTION] button repeatedly to call up the "System" menu display → "Sound" "IAC." The default setting for this function is "On." Using Headphones Connect a pair of headphones to one of the [PHONES] jacks. When the headphones are plugged into either of the [PHONES] jacks, the internal speaker system is automatically shut off. Two [PHONES] jacks are provided. Two sets of standard stereo headphones can be plugged in. (If you are using only one pair of headphones, you can plug them into either of these jacks.) Standard stereo phone plug CAUTION Do not use headphones at a high volume for an extended period of time. Doing so may cause hearing loss. 16 P-515 Owner's Manual
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