Yamaha P-125a Owner's Manual
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D I G I T A L P I A N O
Owner's Manual
EN
Before using the instrument, be sure to read "PRECAUTIONS" on pages 5 – 6.

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Questions and answers

Antonio
February 21, 2025

certain keys produce a different sound and or suddenly an odd sound emrges when pressing 2 keys

1 comments:
Mr. Anderson
February 21, 2025

Certain keys on the Yamaha P-125a may produce a different or odd sound when pressing two keys due to the way the keyboard processes multiple key presses. The issue could be related to the "Dual" or "Split" modes, which allow different voices to be assigned to different sections of the keyboard. Additionally, the document mentions unpredictable behavior when multiple keys are pressed at the same time, possibly involving the sustain pedal. This suggests that certain key combinations and pressure levels might trigger unintended sound variations.

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Summary of Contents for Yamaha P-125a

  • Page 1 D I G I T A L P I A N O Owner’s Manual Before using the instrument, be sure to read “PRECAUTIONS” on pages 5 – 6.
  • Page 4 You should note this serial number in the space provided below and retain this manual as a perma- nent record of your purchase to aid identification in the event of theft. Model No. Serial No. (1003-M06 plate bottom en 01) P-125a Owner’s Manual...
  • Page 5: Precautions

    • Use the specified AC adaptor (page 25). Finally have the device inspected by Yamaha service personnel. • Check the power plug periodically and remove any dirt or dust which may have - The power cord or plug becomes frayed or damaged.
  • Page 6 Yamaha cannot be held responsible for damage caused by improper use or modifications to the product, or data that is lost or destroyed. Always turn the power off when the product is not in use.
  • Page 7: Table Of Contents

     Feel like a pro with the Rhythm feature that automatically adds accompaniment when you play the keyboard (page 20).  Practice effectively by using the built-in recorder and metronome (pages 16 and 21).  “Smart Pianist” (free download) lets you make various settings intuitively while viewing the screen (page 23). P-125a Owner’s Manual...
  • Page 8: About The Manuals

    Thank you for purchasing this Yamaha Digital Piano! This instrument provides exceptionally high-quality sound and expressive control for your playing enjoyment. We recommend that you read this manual carefully so that you can fully take advantage of the advanced and convenient functions of the instrument.
  • Page 9: Introduction

    [] (Record) button ......page 21 !5 [PHONES] jacks ........page 11 For recording your keyboard performance. For connecting a set of standard stereo head-  /] (Play/Stop) button ...... page 21 phones. For playing back or stopping the recorded perfor- mance. P-125a Owner’s Manual...
  • Page 10: Setting Up

    Doing so eliminates the risk of damage to the other equip- ment. If you do not want the instrument to turn off auto- matically when connected to other equipment, disable the Auto Power Off function. P-125a Owner’s Manual...
  • Page 11: Adjusting The Master Volume

    D#2: 0 (reset to the default setting) Stereophonic Optimizer On/Off While holding down [PIANO], press the F3 key to turn the function off or F#3 to turn on. IAC Depth P-125a Owner’s Manual...
  • Page 12: Using A Pedal (Sustain)

    The [PEDAL UNIT] jack is for connecting the LP-1 selected, this pedal switches Vibrato on and off. pedal unit (sold separately). When connecting the pedal unit, make sure to also assemble the unit on the L-125 keyboard stand (sold separately). P-125a Owner’s Manual...
  • Page 13: Reference

    * Refer to the printing above the keyboard (SOUND BOOST Synth Pad OFF/ON). Acoustic Bass Electric Bass [+BASS] Bass & Cymbal Fretless Bass Refer to the “Voice List (Detailed)” on page 26 for more information on the characteristics of each preset Voice. P-125a Owner’s Manual...
  • Page 14: Layering Two Voices (Dual)

    Down by 1 Down by 1 octave octave Default setting Default setting Voice Voice (different for (different for each Voice each Voice combination) combination) Up by 1 octave Up by 1 octave Setting range: -2 – +2 P-125a Owner’s Manual...
  • Page 15: Splitting The Keyboard (Split)

    Pedal function in Duo • Damper Pedal: Applies Sustain to the right section. • Sostenuto Pedal: Applies Sustain to both sections. • Soft Pedal: Applies Sustain to the left section. To exit from Split, simply press any Voice button. P-125a Owner’s Manual...
  • Page 16: Using The Metronome

    * Refer to the “VOLUME” indications (-1/default/+1) printed key to decrease the value by 10, C#2 to reset to the above these keys. default value, or D2 to increase by 10. * Refer to the “TEMPO” indications (-10/default/+10) printed above these keys. P-125a Owner’s Manual...
  • Page 17: Setting Various Items For Performances

    Voices and harpsichord Voices. You have to hit the keys hard to produce a loud sound. Fixed: The volume level does not change at all regardless of whether you play the keyboard soft or hard. P-125a Owner’s Manual...
  • Page 18: Playing Back Songs

    No.7, J.S. Bach 8’ BWV 1058 Gigue, Französische Suiten Nr.5, Harpsi.8’+4’ J.S. Bach BWV 816 The demonstration pieces listed above are short rearranged excerpts of the origi- nal compositions. All other songs are original (© Yamaha Corporation). P-125a Owner’s Manual...
  • Page 19: Using Quick Play

    • The Rhythm part recorded to a User Song cannot be muted. Practice the part which is turned off. NOTE • Songs 16 – 20 of “50 Classics” are duet songs. The right-hand Part is for the first player, and the left-hand Part is for the second player. P-125a Owner’s Manual...
  • Page 20: Adding Accompaniment To Your Performance (Rhythm)

    NOTE • For details on how to play Chords, refer to commercially available chord While holding down [RHYTHM], press the same key books. as in Metronome Tempo (page 16). P-125a Owner’s Manual...
  • Page 21: Recording Your Performance

    Voice, Beat or Rhythm. While holding down [], press [R] or [L] for the part you want to record, to engage Record Ready Mode. To exit from Record Ready mode, press []. Lights up Flashes Recording P-125a Owner’s Manual...
  • Page 22: Deleting The User Song

    • In this status, do not press [ /] or any key. Other- wise, recording starts and the data will be deleted.  While holding down [], press [ /] to change the initial settings and to exit from Record Ready mode. P-125a Owner’s Manual...
  • Page 23: Connecting Other Equipment

    F5 key to set to “Variable,” or press the F#5 key to set to “Fixed.” Default setting: Variable (Off) NOTE • When this parameter is set to “Fixed,” the headphones volume will also be fixed. P-125a Owner’s Manual...
  • Page 24: Connecting To A Computer

    SMF file. For is completed, both lamps turn off. details, refer to the “Computer-related Operations” on NOTE page 8. • If this instrument somehow malfunctions or fails to operate properly, try initial- izing the data as described above. P-125a Owner’s Manual...
  • Page 25: Appendix

    * The contents of this manual apply to the latest specifications as of the Storage publishing date. To obtain the latest manual, access the Yamaha website • Internal Memory: Total maximum size approx. 900 KB (User then download the manual file. Since specifications, equipment or sepa- song: One song approx.
  • Page 26: Voice List (Detailed)

    [+BASS] Bass & Cymbal Adds a cymbal Voice to the bass sound. Ideal for walking bass lines in jazz tunes. Fretless Bass The sound of a fretless bass. Suitable for styles such as jazz and fusion. P-125a Owner’s Manual...
  • Page 27: Index

    ..............16 MIDI Basics ..............8 Variation Voice ............13 MIDI Reference ............8 Voice List ..............13 Music Rest ..............8 Voice List (Detailed) ..........26 Voices ................13 Volume ..............16, 20 Octave ................14 Operation Confirmation Sounds .......11 P-125a Owner’s Manual...
  • Page 28: List

    S. Joplin G#5 Maple Leaf Rag S. Joplin La Fille aux Cheveux de Lin C. A. Debussy A#2 Arabesque No.1 C. A. Debussy Cakewalk C. A. Debussy Je te veux E. Satie C#6 Gymnopédies No.1 E. Satie P-125a Owner’s Manual...
  • Page 29 Memo...
  • Page 31 Head Office/Manufacturer: Yamaha Corporation 10-1, Nakazawa-cho, Naka-ku, Hamamatsu, 430-8650, Japan DMI30 Importer (European Union): Yamaha Music Europe GmbH Siemensstrasse 22-34, 25462 Rellingen, Germany Importer (United Kingdom): Yamaha Music Europe GmbH (UK) Sherbourne Drive, Tilbrook, Milton Keynes, MK7 8BL, United Kingdom...
  • Page 32 Yamaha Global Site https://www.yamaha.com/ Yamaha Downloads https://download.yamaha.com/ Manual Development Group © 2022 Yamaha Corporation Published 05/2022 POTY-A0 VFU0680...

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