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Re: Yamaha P105 teardown [Re: dewster] #2725878
04/01/18 05:10 PM
04/01/18 05:10 PM
Joined: Feb 2018
Posts: 13
Oregon
Pallen Offline
Junior Member
Pallen  Offline
Junior Member

Joined: Feb 2018
Posts: 13
Oregon
Quote
dewster For 16 bit stereo, 44.1k sample rate, this gives:
16MB / 2 bytes/sample / 2 stereo samples / 44100 samples/sec = 95 seconds of sample time. /88 = 1.08 seconds per note. To get any kind of realism out of it requires a stretching factor of at least 3x (and indeed there are 29 stretch groups on the P105 : 88/29=3.03).

. Due to affordability I am considering the YD P-115 which seems to have the same stretch issue as the P105 as referenced. The idea of the stretching does bother me, but is stretching for 3 notes that noticeable? Hey, if I could afford a Kawai ES110 I would just go for one. I have not found any ES110's used for any price and if I did, I know it would be for significantly more than than the $399 price that I can very regularly find a P-115 used for. Perhaps the fact that the P-45 and P-115 so often come up for sale as players move up the upgrade ladder is saying somthing about them (although many in that range would be piano students that just lose interest). Obviously players are hanging onto there ES110's though, and this is saying somthing about their quality. But should I really be worrying about the stretching issue so much? I know I sure notice my eMedia student KB sounds off and several along this thread have said stretching is noticeable and that gives me pause. I do find it interesting though that out of ALL the reviews for the P105 and P115 I have read NONE of them thought to mention note stretching comparisons with other DP's.

. I have read this through and thoroughly enjoyed its contents. I have also referenced back to it several times in my research of a DP. Thank you for all who have contributed to it.

Last edited by Pallen; 04/01/18 06:41 PM. Reason: clarity, and to get quote working

Using an eMeda 61 KB for dummies Yup, That's really what it's called. Can you blame for wanting to upgrade to an 88 key Digital Piano (ie. YDP115w). Yep, I've got the bug for digital sound and 88 keys. I am learning to play using PianoVideoLesson.com Year 1 Course, and am currently in Unit 3.
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Re: Yamaha P105 teardown [Re: McBuster] #2725898
04/01/18 06:48 PM
04/01/18 06:48 PM
Joined: Jul 2012
Posts: 7,721
Northern England.
peterws Offline
7000 Post Club Member
peterws  Offline
7000 Post Club Member

Joined: Jul 2012
Posts: 7,721
Northern England.
Originally Posted by McBuster

Here is a link to a young man that is constantly publishing new work on YouTube. On a lowly Yamaha DGX-650.

https://www.youtube.com/channel/UCfWXf5EvbPUxrN7vFDspDQQ

I wonder if he wonders of fulcrum location, key weight or what chipset? He bought it to play, and imho, he does pretty well.



WHERE are all his videos? All there are here, are tutorials. I've listened to loads of his stuff, and excellent it is too. . . .


"I am not a man. I am a free number"

"[Linked Image]"
Re: Yamaha P105 teardown [Re: peterws] #2725922
04/01/18 10:09 PM
04/01/18 10:09 PM
Joined: Apr 2016
Posts: 250
Oregon USA
jarobi Offline
Full Member
jarobi  Offline
Full Member

Joined: Apr 2016
Posts: 250
Oregon USA
Originally Posted by peterws
Originally Posted by McBuster

Here is a link to a young man that is constantly publishing new work on YouTube. On a lowly Yamaha DGX-650.

https://www.youtube.com/channel/UCfWXf5EvbPUxrN7vFDspDQQ

I wonder if he wonders of fulcrum location, key weight or what chipset? He bought it to play, and imho, he does pretty well.



WHERE are all his videos? All there are here, are tutorials. I've listened to loads of his stuff, and excellent it is too. . . .


https://www.youtube.com/watch?v=8OmYxFWN5wU&list=PLqyczEJufNOUJ7xRd1EWSg2EuCpX1-O8F

Re: Yamaha P105 teardown [Re: zerox61] #2865103
07/02/19 11:08 AM
07/02/19 11:08 AM
Joined: Nov 2012
Posts: 20
B
blotchy Offline
Full Member
blotchy  Offline
Full Member
B

Joined: Nov 2012
Posts: 20
I know this is an old thread, but hoping to fix my P-105 myself.... is it easy enough to remove JUST a key at a time? I'd like to clean them all. I have removed all the main assembly screws and separated the halves, but that didn't help me get the keys off (so far).

Re: Yamaha P105 teardown [Re: zerox61] #2865107
07/02/19 11:18 AM
07/02/19 11:18 AM
Joined: Aug 2016
Posts: 3,289
G
Gombessa Offline
3000 Post Club Member
Gombessa  Offline
3000 Post Club Member
G

Joined: Aug 2016
Posts: 3,289
Yes, it's pretty easy as long as you're comfortable working with a few dozen screws and flipping around a 30+lb chassis as needed (which it seems you've already done).

There are tons of videos on YT about disassembling P-105/P-115s and working with the Yamaha GHS action. Here's a random one: https://www.youtube.com/watch?v=gOBbFWgIFBA, there are lots more.

One thing to note is that the P-105 doesn't have an individual keys, you can't remove them one at a time. They come in single molded sheets of 3/4/5 keys a piece, so you'll be removing key sets in connected batches.


Yamaha P-85, P-105, CP50, Kawai MP11 || Kawai NV-10
Re: Yamaha P105 teardown [Re: zerox61] #2865408
07/03/19 06:26 AM
07/03/19 06:26 AM
Joined: Nov 2012
Posts: 20
B
blotchy Offline
Full Member
blotchy  Offline
Full Member
B

Joined: Nov 2012
Posts: 20
Thanks Gombess!

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