Introduction
ADAT LX20 Reference Manual 5
INTRODUCTION
Thank you for purchasing the Alesis ADAT-LX20 20-Bit Digital Audio Recorder.
To take full advantage of the LX20’s functions, and to enjoy long and trouble-free
use, please read this manual carefully.
Here are some of the LX20’s most significant features:
• Low tape cost. The LX20 can record over an hour of audio on a standard S-VHS
tape cassette.
• Superb fidelity. The LX20 offers 20-bit recording to tape using the ADAT Type
II format, along with a choice of a 44.1 or 48 kHz sampling rate (with 64 times
oversampling), for better-than-CD quality sound.
• Digital and analog inputs/outputs. In addition to conventional analog inputs
and outputs, a “master” digital I/O carries all eight tracks simultaneously via
optical cable, allowing for lossless signal transfers between ADAT interface-
compatible devices (tape recorders, hard disk recorders, synthesizers, signal
processors, etc.).
• Easy expandability for more tracks. Multiple LX20s can be synchronized
without any external hardware, and without giving up any tracks, to expand
your digital recording system. Two LX20s give 16 tracks, three LX20s 24 tracks,
and so on. Up to 16 LX20s or other ADAT-family digital recorders can work
together, and all are locked within 20 microseconds (1 sample) accuracy.
• Included remote control. Each LX20 comes with the LRC (Little Remote Control)
for remote control of transport, autolocation, and input select functions.
• Optional remote control. The BRC (Big Remote Control) allows for
sophisticated synchronization and overdubbing functions for multiple ADAT-
compatible machines, remote control of virtually all recorder functions, and
SMPTE read/generate.
• International no-hassles power compatibility. The LX20 accepts any AC
voltage between 90 and 250 volts, so you can use it whether you’re laying down
tracks in L.A, mixing in Munich, or synching in Seoul. (Or dealing with a
brownout in New York City, for that matter.)
• Built-in time code. Each LX20 tape is formatted with a proprietary time code
that is much more accurate than SMPTE, and time-stamps the tape with single-
sample accuracy. This allows for machine synchronization without giving up an
audio track, accurate tape counter readings without “slippage,” and intelligent
autolocation functions.
• Compatibility with multi-channel mixdown formats. The LX20 is ideal for
quadraphonic, surround, and theatrical sound applications that require more
than two channels for the final master.
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