Disklavier

This is a non-technical reply from someone who knows zilch about audio CDs
except that they work. Audio CDs are digital audio, meaning the operative
word here is digital.  Whatever makes an audio CD different from a data CD
is something you guys know something about.  It is in that difference that
makes PianoSmart work.  The audio CD has data encoded so that it knows which
one it is; i.e. it knows if it is a Frank Sinatra CD from a Karen Carpenter
CD.  Whatever this data is, the Yamaha CD player reads it.  When the MIDI
information is recorded for the piano to play along with a specific audio
CD, it uses the MIDI Time Code (MTC), whatever that is!  This MTC knows
exactly when to interface with the data on the audio CD and it can be done
either inYamaha'a production department, or on your own Disklavier with the
PianoSmart program installed.

In other words, the MTC is in the MIDI info on the floppy and not on the
audio CD.  I not sure it would appear in a hex dump because it is a timer
thingy.  There is a digital timer on the audio CD and a digital timer in the
MIDI information.   All the MIDI has to do is sync with the CD timer.
That's probably why PianoSmart only works on Yamaha CD players.

Hope everyone has a happy and prosperous New Year!

Carol Beigel

----- Original Message ----- 
From: "fkagel" <fkagel@...>
To: <disklavier@yahoogroups.com>
Sent: Tuesday, December 30, 2003 9:32 PM
Subject: [disklavier] Dissecting Sysex and/or MTC w/ PianoSmart


> Re: Mark III Series
>     Recoding own accompaniment to CD
>
> Is there anyone in the group that has dissected the MIDI data when
> accompanying a CD? The system 'knows' which CD is supposed to be in
> place and will indicate that the wrong one has been inserted if that
> is the case.
>
> I've noted 3 SYSEXs at the beginning:
> F0 05 7E 7F 09 01 F7 - Turns on GM, but what is the 2nd Byte 05 mean?
> F0 08 43 10 4C 00 00 7E 00 F7 - XG on, but what does 2nd Byte 08 mean?
> F0 05 43 71 05 01 F7 - Don't know???
>
> Where is the MTC or what controls the CD sync? What should I be
> looking for in the hex dump?
>
> Between the 2nd and 3rd Sysex, I have a hex dump that someone is
> welcomed to look atd. Game, Midimagic?
>
> Fred Kagel
>
>
>
>
>
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