ADAT HD24 Frequently Asked Questions
I. The new ADAT/FST Recording Format
1. What’s the difference between the HD24's disk format and other formats?
The Alesis ADAT File Streaming Technology, or ADAT/FST, records onto hard drives in a unique
way designed from the ground up for multitrack audio. Many other hard disk recorders use the
Microsoft-designed FAT32 or Apple's HFS+ file format. Since these were originally designed for
the relatively small data files used in personal computers, not for real-time multitrack recording
and playback, they break up audio into many small files scattered across the disk. Alesis
ADAT/FST keeps all the tracks of a song in large associated clusters on the hard disk, so the disk
doesn't have to "hunt" all over during recording and playback.
2. What are the main advantages of ADAT/FST?
A. It allows the use of inexpensive IDE drives. This type of hard drive has become so
affordable that you can leave the drives themselves on the shelf as the permanent storage
medium—you don't have to backup to tape or optical media just so you can reuse the
drive. ADAT/FST is so efficient that it can accept any IDE drive made today, including
5400 RPM drives, and UDMA-33/66 is not required. The drives required for compet
ing systems cost more because they require exceptionally fast seek times to keep up with
the demands of multitrack audio recording in real time on a FAT32 or HFS+ formated
hard disk.
B. Virtually instantaneous access time to any given point within a song, or between
songs. Locate to the start, end, middle or wherever in the song that you like without
hesitation.
C. Longer drive life and less maintenance. ADAT/FST's audio-optimized recording scheme
is less likely to trash your drive. Traditional recording systems have been known to
wear out high performance hard drives in a matter of months. With ADAT/FST, your
low-cost drives can last for years.
D. No defragmenting required. Because data is written to the disk in such an audio-
optimized, reliable manner, the ADAT/FST never requires your drive to be
defragmented. Even after editing, a track appears as a whole piece, not dozens of
fragments.
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The First Hard Disk Recorder Worthy of the Name ADAT
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