Undo; The Edit Buffer And Levels Of Undo - Alesis ADAT-HD24 Reference Manual

editing • chapter 6

Undo

The undo command reverses the effects of previous
edit commands.
available (with certain restrictions on size). For
example, if you don't like the results of a
command, you can press
recording to its pre-paste state. Pressing
again will (for example) undo a
happened before the paste, and so on, up to 99
operations.
NOTE: You can't undo a recording, deleting a song,
or any other function besides CUT, COPY, or
PASTE.

The Edit Buffer and Levels of Undo

The ADAT HD24 uses a special area of the hard
disk to store data used for editing operations. This
edit buffer can save a copy of any original audio that
will be destroyed by an edit operation, as well as
the edit data itself. This prereserved edit buffer
holds up to 72 track-minutes of 48 kHz data (3
minutes of 24 tracks). These track minutes are NOT
part of the free space on the disk used for recording;
they're always available even if you have no "HD
Free Space" left.
In most practical applications, this space is more
than enough to undo a bunch of previous edits if
you decide you've made some mistakes. We say
"up to 99 levels" of Undo because this edit buffer is
"revolving"—it tries to save as many previous edits
as possible, but starts erasing old edits if it needs
space for new ones, without warning. Luckily, in
most cases edits are performed on only a few tracks,
and are 10-20 seconds long. Usually, you'll be able
to UNDO back through several generations of
editing (most likely, more than you'll remember!).
A feature called paste undo on/off allows you to get
more mileage out of the buffer. At its most extreme,
if you cut 90 seconds across all 24 tracks, and pasted
it in a different location, you'd have only one level
of Undo: half the buffer is used for the cut data, and
half for the data being pasted over. In this case, the
HD24 would have to delete all the old UNDOs in
the "stack" to get the space to perform the paste. If
Paste Undo was set to off, half of the buffer (36
track-minutes) and some previous UNDOs would
still be available–but you'd better be sure you're
pasting over track segments you don't want!
62
Multiple levels of undo are
to return the
U N D O
operation that
CUT
PASTE
UNDO
The following actions will also erase the
edit buffer:
• Selecting a different drive
Turning off the unit
•
Changing to a different Song (except the last
•
CUT or COPY will be preserved, so you can
paste between songs).
ADAT HD24 Reference Manual