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25 - DD1000 DISK COMPATIBILITY
STEREO EDITS SAVED IN DD1000 FORMAT
Unlike the DD1000, the DD1500 allows you to edit the left and right channels of a stereo
recording independently on separate tracks. Such edits made on the DD1500 cannot be
played correctly on the DD1000 and edits made in this way will playback as follows on the
DD1000:
LEFT
RIGHT
LEFT
RIGHT
Be aware of this when editing DD1000 material in this way on the DD1500 as you may
experience problems when you come to transfer the disk back to the DD1000.
DD1000 EDIT CUE PARAMETER COMPATIBILITY ON THE DD1500
LEVEL
FADE
PAN
USING DD1000 DISKS ON V1.00 DD1500
Stereo recordings will show as yellow on a DD1500 with V1.00 installed. Mono recordings
may be used however.
MULTIPLE DISK DRIVE SYSTEMS
The DD1500 works with multiple disk drives very differently from the DD1000 (much better
in fact!). A problem with the DD1000 was that you had to make sure that a disk was in its
original drive before it would playback properly. This is because the SCSI ID is a part of the
Qlist cue. For example, if a cue is specified to play from drive ID#3 but the disk is placed in
drive ID#5, it will not play.
The DD1500 uses a method based on each disk's unique label. This means that the
DD1500 'learns' the actual SCSI ID when the project is loaded. Therefore, a disk can be
placed in any drive and the project will still play back correctly regardless of the SCSI IDs
the drives may be. The following illustrates the difference between the two methods.
A cue in a DD1000 Qlist says:
If it can find that take on the disk in the drive with ID#X, it will play the cue. If it doesn't find
that cue on the disk in drive #X, it will not play it. Neither will it try to look for it on another
drive because it is specifically looking for it on that ID and no other.
Page 276
DD1500
< ERASE >
DD1500
< NOTHING >
Compatible except you will note that note that maximum
level in a DD1500 cue is +6dB (as opposed to +12dB on
the DD1000). DD1000 cues set to greater than +6dB will
be limited to the DD1500's maximum cue level.
The DD1500 SINE fade will be used as an approximation
of the DD1000's 'fast' curve and the DD1500's LINEAR
fade will be used in place of the 'slow' DD1000 fade.
DD1500 has no cue pan and so this will be ignored.
"Play [TAKE N] from the disk in the drive with the SCSI ID#X"
DD1000
< SILENCE >
DD1000
< NOTHING >
Version 2.00 - November, 1994
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