How do I transpose on the yamaha p 105 - Yamaha P95 Digital Piano

Whether it happens to all of the key?
If yes, transpose setting may have changed. Change the setting to normal (0).
If the normal transpose, but tuning is still not standardized, check Pitch Setting.
To Restore Standard Pitch setting:
Hold down the A-1, B-1, C0 and C # 0 keys simultaneously and press any key between C3 and B3.
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If the above procedure is still no effect, try resetting the factory settings / Initialize overall: :
This is the steps:
Initializing the Settings
When you initialize the settings, all backup data stored to this instrument will be initialized and reset to the factory default settings.
Turn off the power to the instrument. Then, simultaneously hold down the C7 key (right-most key on the keyboard) and turn the power on again.

NOTICE
Do not turn off the power to this instrument while it is initializing the data in its internal memory (that is, while the button indicators are flashing).

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Notes:
If this instrument somehow becomes disabled or malfunctions, turn off the power to the instrument, then perform the initialization procedure.

i would discuss it with the dealer you bought it from. He'll have you go though the commands again just to be sure. At that point he'll ask that it be brrought in for service or will refer you to a service center. If it is over a year old it will be out of warranty, but if you approch him polietly he may try to bend the time period for you.

Probably the transpose button on your keyboard has become short. You need to clean the contact by a cleaning agent such as WT-40 or similar one. If not, you need to change the button.

A SIMPLE way of looking at the transposer is that it shifts EVERY key on the keyboard left (+) or right (-) by the number of the transpose. ALL keys, black and white are counted. As far as counting sharps and flats I would NOT depend on that. The transpose would for instance allow you to play a song you knew in "C" and have the sounds moved to a different key. For instance, a transpose of +2 would move EVERY C to "sounding" D, C# to D#, D# to F, E to F#, F to G, F# to G#, G to A, G# to A#, A to B, A# to C, and finally B would sound C# pitch. Given a key like G for a song that has one sharp (F#) to play this by keying it in the key of "C" you would use a transpose of +6 or minus 6. The number of key positions (including black) between the key you want to play in and the key the song is in. For a song in D that is played in C you would use either a +2 transpose or a -10 depending on whether you wanted the higher or lower octave to sound. Looking at it this way I do NOT believe the method you proposed would work... Look at it the way I described and you won't go wrong.

see

http://www2.yamaha.co.jp/manual/pdf/emi/english/synth/mm6_mm8_en_om_b0.pdf

page 50

You have set the transpose to +1. You need to reset the transpose function to zero or no transpose.

Read here: http://faq.yamaha.com/us/en/article/musical-instruments/keyboards/digitalpianos/p_series/p-95_color_variation/4713/3479

Look in your manual under "transpose". The transpose feature shifts the keys up or down often up to a full octave. This allows you to play in ANY music "key" you know and generate sound in a different one for say a vocalist who only sings in another...

how come mine is ok, maybe it's depends on where you bought it.

<a href="http://bestdigitalpianoreview.com/yamaha-p-85-review">Yamaha P85 Review</a>

On page 105 of your X5D manual, read up about "transpose". Setting the transpose shifts the notes plus or minus from the normal.

If you don't have a manual, you can download one for free.