Disklavier

Hi Fred

To help prove the CD point you could convert the audio from the
ORIGINAL to mp3s then burn a NEW cd from the MP3s and see if the DKV
throws it out.

FK: Carol Beigel already copied a CD (see group post) and I have made a CD from MP3s with the same result: "Different CD" requested.

I have looked at the two files on the disk Pdisk.mng and Psong.mng
both of these look normal.

FK: Agree. I fact, I've deleted them and the DKV still complains.

Have you tried copying the Piano001 & Piano002 files to a fresh
floppy? Try that, first WITHOUT the two mng manager files.

FK: Good idea.

Just a thought. My DVD player knows the last 15 or so DVDs I have
played and this must be stored in ram somewhere. Could the DKV be
doing the same thing storing the CD contents and the floppy's ID to
ram.

FK: Hmmm.

Of course every floppy has an ID number this can be changed with
FXedit. Try that, change the floppy's ID and see what happens.

FK: Let me copy the files to another floppy first.

I do not own a DKV only a CVP this end so I can not play with me
ideas.

Midi Magic



--- In disklavier@yahoogroups.com, James Fry wrote:
> On Sun, 18 Jan 2004, Freehold Computer Training wrote:
> > James,
> > You will NOT need my CD. Burn ANY audio CD, even from MP3s. Use
> > PianoSmart to record to floppy OR memory disk. Play back and
observe
> > what happens if you change the CD. The system 'knows' there is a
> > DIFFERENT CD. No UPC/EAN since these not original CDs. I believe
that
> > even blank CDRs prior to burning have some identifier on the
media (pre
> > DRM debacle)! I doubt that Yamaha uses any algorithm similar to
CDDB or
> > Free DB. Bottom line: something is written to the floppy and that
> > something is an identifier coming from the CD. The question in my
mind
> > is deciphering the identifier on the floppy as it relates to the
CD. I
> > am using FXEdit to read the MIDI data on the floppy.
> >
> > Fred
>
> I think you missed my point - different areas of the world have
slightly
> different versions of commercial CD's. If I get a pianosmart disk
that was
> designed for the USA release of some CD, if I buy a European
edition there
> is a possibility that the tracks will be slightly different mixes,
or have
> a bonus track which screws up the algorithm. If you record a CD,
unless I
> have an exact copy of it here, I'm not going to be able to play
around
> with generating the hash/identifier/code myself from the CD and
comparing
> it with that present in the pianosmart file. Yamaha WILL use an
algorithm
> similar to CDDB - there is no other sensible way of doing it - but
> deciphering exactly what the algorithm is may take some time
>
> I'll take your word for the UPC/EAN code being ignored - not having
a
> working pianosmart system means that I'm unable to test with home
recorded
> CD's. Blank CDR's do have an identifier on them which describes the
> manufacturer, write speed, dye type, manufacture date, etc., but I
don't
> believe there is a serial number present in any form. In any case,
this
> would be different from that present on a commercial CD.
>
> If you were to make an exact copy of a pressed CD that had been
used for a
> pianosmart recording, what would happen when you played the copy? I
would
> expect the piano to not know the difference. Note this would have
to be an
> exact copy, with each track exactly the same number of sectors in
length
> etc.
>
> Regards,
>
> James