Lexicon 300L - User manual

The Lexicon 300L Digital Effects System is a
powerful example of Lexicon’s world-class digital
effects systems. It is an updated version of the
popular and versatile Model 300, with the addi-
tion of LARC (Lexicon Alphanumeric Remote
Console) control.
The 300L also offers extensive analog and
digital interfacing capabilities. With both AES
and S/PDIF digital I/O, it digitally interfaces
with a wide range of digital recording systems. Its
multi-machine architecture also allows both the
analog and digital inputs to be used simultane-
ously. In post-production facilities, the 300L is
also the system of choice for its extensive MIDI-
and timecode-based effects automation.
LARC
In a majority of the acclaimed facilities around
the world, you’ll find a LARC. It provides easy
access to all the 300L’s functions and parame-
ters, and its lightweight design allows you to set
it on top of a console or hold it in your hand.
Thesupple,thincableprovidesadirectlinkwith
the mainframe from up to 1,000 feet away. Large
alphanumeric LED displays provide pertinent
information at a glance and can be read at
almost any viewing angle – a must in the high-
pressure environment of your critical mixes.
Most significantly, the LARC allows you to
control all of your most important processing
parameterswithout moving fromtheideal moni-
toring position.
Setups and Effects
In the 300L, Single ‘Setups’ run two proprietary
Lexicon DSP engines in a single unified stereo
configuration. One program is loaded, with both
analog and digital inputs simultaneously avail-
able and capable of being mixed together. Input
levels and pans can be stored, automated, and
later recalled.
The 300L’s multiple machine architecture
alsoallows for two differenttypesofSplit configu-
rations: Dual Mono and Cascade.
Dual Mono creates two independent paral-
lel DSP machines, each being dedicated to input
pans.Additional routing ispossible, to send both
analog inputs to machine A and both digital
inputs to machine B. Dual Mono setups also offer
patch points which are in either ‘pre’ or ‘post’
processor location.
Thesecondtype of split configuration isthe
Model 300L Digital Effects System

Cascade mode. In this mode, the two DSP engines are arranged serially:
the output of machine A feeds the input of machine B. A feedback con-
trol routes the output of machine B back to the input of Machine A.
Each machine has independent mix controls. Cascade patch points
include locations either ‘Pre A’, ‘Post A (Pre B)’ or ‘Post B’.
The effects algorithms for the 300L are divided into two main cat-
egories: Single Effects and Split Effects.
Single Effects algorithms include: Random
Hall, Random Ambience, Stereo Adjust/Delay,
Stereo Pitch Shift, and Rich Plate.
In the Split Effects, the available algorithms
are Dual Delays, Chamber, Mono Pitch Shift, Small
Stereo Adjust, Compressor, and PONS. Any of the
‘split’ effects can be run in either Machine A,
Machine B, or both.
Single Effects
Our research into the physics of classical acoustics
is embodied in the Random Hall algorithm. Echograms of real halls
have dispelled the myth of pre-delay and early reflections. In actual
spaces, there is no empty interval between the direct sound’s arrival and
maximum reverb density, to be filled in by early reflections. Instead,
ambience builds gradually, with diffuse and complex reflections which
do not color the timbre of the sound the way that fixed delay taps do.
RandomHall’s unique Size, ShapeandSpreadparameters control the
buildup and decay of the ambient envelope. Size determines how large
the environment will be. Shape controls the contour of the ambient
build: at its highest settings, it provides an inverse envelope for effects
and gating. Spread controls the duration of Shape – the ambient enve-
lope – setting the buildup and sustain. There are also precision filters for
spectral control of reverberation time, and the unique Spin and Wander
parameters add random movement to the entire algorithm, insuring
silky smooth reverberant decay.
We created Random Ambience specifically
for the post-production environment. It enables
accurate matching of a previously-recorded ambi-
ence, enabling new elements to be blended in
seamlessly and realistically. You can place sound
effects, dialogue, or even musical instruments and
recorded music, at different depths and panning
within the ‘space’.
The Stereo Adjust program is a two-chan-
nel digital mixer that provides high-precision
level, stereo balance, and shelving equalization control in the digital
domain. Also included are unique controls like Rotation for binaural
panning, Spatial Equalization that can add or subtract stereo width, DC
Offset Nulling, and a Shuffler Boost for binaural recording. Stereo Adjust
also enables M/S decoding in the digital domain.
This algorithm also incorporates a stereo delay line capability of up
to five seconds maximum, with single-sample fine adjustment and feed-
back capability. The 300L also includes a
true stereo Pitch Shift with
musical interval notation, plus
delay and feedback on each
voice. The range of pitch shift on
each voice is two octaves down
to one octave up.
The Rich Plate algorithm is
designed to simulate plate rever-
beration devices popular in the
’70s and ’80s. Typically, plates are
bright and highly diffused, with
characteristically colored rever-
berationcontent.Twostereopre-
echoes can be used to create soft-
diffused or hard, non-diffused
reflections. A third stereo pre-
echo can be routed back to the
input, allowing independent
recirculating echoes separate
from the reverb.
Split Effects
The Dual Delay algorithm
includes multiple stereo delay
lines with independent diffusors.
An internally generated LFO
Updating your existing Model 300 is a snap – just plug in the new ROMs

allows effects such as ‘over the top’ flanges and
auto panning effects to be created.
Chamber is a new Lexicon reverb
algorithm with a wide range of adjustable
parameters. Ideally suited for vocals, it provides
a virtually perfect recreation of traditional
reverb chambers.
Mono Pitch
Shift features a pre-
delay line feeding
the pitch shifter
with a feedback loop
back into the pre-
delay. The range of
pitch shift is +1, –2
octaves.
A modified
version of the full Stereo Adjust program, Small
Stereo Adjust can be used in the split modes in
conjunction with any of the other split algo-
rithms.
The Compressor program is designed for
digital mastering, and provides an increase in
gain below the threshold while maintaining
unity peak above the threshold. This means
that peak information can remain unaltered
while overall loudness is increased.
The new PONS (Psychoacoustically
Optimized Noise Shaping) algorithm is designed
to achieve optimal dynamic range results when
mastering 20-bit or 18-bit audio to a 16-bit
medium, improving the signal-to-noise ratio of
16-bit recordings by up to 6 dB.
Automation
For those applications where automation plays
an important role in the production process,
the300Lcanbe utilized in a number of ways. In
MIDI environments, the 300L uses MIDI
Program Changes as well as sysex effect
parameter changes,
which can be
recorded into a
MIDI sequencer
and be recalled as
part of the MIDI
playback file.
For non-MIDI
environments, the
300L has a time-
code input which
can be used to automate Setup and Machine
Effects changes as well as parameter glides for
the previously-loaded Setup or Effect.
LR–4 FrameLink
Recognizing that a large number of facilities
will be running a 300L in conjunction with a
Lexicon 480L with v4.2 software, or a 224XL
(or all three), we created the LR–4
FrameLink. The LR–4 allows any combina-
tion(up to four total)of these mainframes tobe
run by a single LARC. The LR–4 is another
example of Lexicon’s continued commitment
to the high-end facility, where brilliant sound is
a priority, but space is limited.
Updating an Existing Model 300
Thanks to the Model 300’s ROM-based system
software, updating your existing unit to 300L
capability is simple.
The update requires the installation of
new ROMs, the LARC and interface cable.
The procedure is simple: all you need to do is
open the unit up, insert the new ROMs, con-
necttheLARC and you’re ready to go. Contact
your Authorized Lexicon Professional Dealer
for update information.
Professional Commitment
The 300L offers a host of features and effects
that set the standard for professional digital
effects processing. It embodies Lexicon’s com-
mitment to the audio professional—with cre-
ative control and superlative sound, backed
with uncompromising support.
Arrange to audition the 300L for yourself
by calling Lexicon or an authorized distributor.
The LR-4 FrameLink allows up to four Lexicon processors to be controlled by one LARC
The LR–4 allows any combination of 300L, 480L or 224XL effects
systems to be controlled by one LARC remote unit. The machine select
button on the LARC is used to choose the device to work with.

The 300L is designed to meet the rigorous needs of the audio professional. With tools for mastering and audio post-production,as well as a host of reverberation and effects
programs for music production applications, the 300L is a world-class effects system that effortlessly services a wide range ofstudio requirements
L.A.R.C. (Lexicon Alphanumeric Remote Console):
Controls: Three mode select buttons
(BANK, PROG, REG) used with
ten numeric buttons (1 to 0);
SETUP/VAR key for selecting
Setups; page select button
(PAGE); control program key
(CTRL); machine select key
(MACH); 3 auxiliary control
buttons (MUTE, STO, ENTER); 6
sliders for control of up to 128
parameters per program with
associated display select
buttons.
Display: Two lines of 12 alphanumeric
LED’s for interactive display;
additional line of 24 alphanu-
meric LED’s (six groups of four
for each slider); dual 10-position
LED headroom indicator
(calibrated –24 to +12 dBm with
overload warning).
Connector Type: DE9
Cable: 50 feet, extra flexible cable.
Cables can be linked.
Operating distance: Up to 100 feet when powered
from mainframe. Up to 1,000
feet with optional remote power
source.
Power: 10-24 VDC; normally powered
by 300L mainframe; miniature
jack accepts optional remote
power supply ( for operation at
distances greater than 100 feet
from mainframe).
Dimensions: 5.9W x 9.5H x 3.2D in
(150 x 242 x 82 mm)
Weight: 1.9 lbs. (0.9 kg)
LARC SPECIFICATIONS
LR–4 SPECIFICATIONS
Controls: AC Power Switch only
(machine is selected
from LARC remote)
Indicators: Power LED, machine LEDs
Interconnections: 5 female DE-9 connectors,
RS-422 serial communications,
9600 bits/sec.
Power: 230/120/100 VAC,
50–60 Hz, 10 W,
via IEC connector
Dimensions: 19W x 1.75H x 4D in
(483 x 45 x 102 mm)
Weight: 2.5 lbs (1.15 kg)
LR–4 Rear Panel

Audio Input and A/D Conversion
Input Channels (2): Balanced XLR, pin 2 high
Input Impedance: 50kΩunbal; 100kΩbalanced
Full Scale Input Level
Gain switch in 0dB position: +2dBu min, +20dBu max
Gain switch in +16dB position: –14dBu min, +4dBu max
Common Mode Rejection
DC to 2kHz: 60dB minimum
2kHz to 20kHz: 40dB minimum
Frequency Response
48kHz Sampling Rate: 10Hz to 21.5kHz, ±0.2dB
44.1kHz Sampling Rate: 10Hz to 20 Hz, ±0.2dB
Phase Linearity: ±5 Degrees, 10kHz to 20kHz
Delay (Frequency Independent)
From Analog In to Digital Out: 0.75ms
Crosstalk: – 80dB maximum, 10Hz to 20kHz
Signal to Noise Ratio: 90dB minimum, A-weighted
Total Harmonic Distortion: 0.01% maximum, 10Hz to 20kHz
Intermodulation Distortion: 0.01% maximum (SMPTE)
Dynamic Range:
90dB minimum
Pre-emphasis: 15µs (±0.9µs) and 50µs (±3µs)
Gain Control: 20dB in 0.1dB increments
D/A Conversion and Analog Out
Output Channels (2): Balanced XLR, pin 2 high
Output Impedance: 75Ω
Full Scale Output Level: –2dBu to +18dBu
Frequency Response
48kHz Sampling Rate: 10Hz to 21.5kHz, ±0.2dB
44.1kHz Sampling Rate: 10Hz to 20 Hz, ±0.2dB
Phase Linearity: ±5 Degrees, 10kHz to 20kHz
Delay (Frequency Independent)
From Digital In to Analog Out:
1.8ms
Crosstalk: –90dB maximum, 10Hz to 20kHz
Signal to Noise Ratio: 100dB minimum, A-weighted
Total Harmonic Distortion: 0.01% maximum, 10Hz to 20kHz
Intermodulation Distortion: 0.01% maximum (SMPTE)
Dynamic Range:
90dB minimum
De-emphasis: 15µs (±0.9µs) and 50µs (±3µs)
Gain Control: 20dB in 0.1dB increments
Unless otherwise indicated, specifications presume 48kHz sample
rate, Emphasis off, Gain switch and Gain Control at unity (0dB)
Analog Input to Analog Output
Frequency Response: 10Hz to 21.5kHz, ±0.2dB
Crosstalk: –80dB maximum, 10Hz to 20kHz
Signal to Noise Ratio: 90dB minimum, A-weighted
Total Harmonic Distortion: 0.01% maximum, 10Hz to 20kHz
Intermodulation Distortion: 0.01% maximum
Dynamic Range: 90dB minimum
Digital Audio Interfaces
AES/EBU Professional Digital Audio Interface
Balanced female XLR digital input; balanced male XLR digital output.
Conforms to both the AES ANSI S4.40-1985 spec and the EBU doc
tech 3250. Both input and output are transformer-coupled.
Input/Output levels and impedance comply with CCITT V.11 EIA-
422A specification.
EIAJ CP-340/SPDIF Consumer Digital Audio Interface
Unbalanced coaxial RCA-type digital input and output; SPDIF com-
patible Optical (fiber optic) type digital input and output.
Sample Frequency
Master:
48kHz ±5Hz; 44.1kHz ± 5Hz
Slave: 42kHz to 50kHz;
Control Interfaces
Time Code Input: Balanced female XLR, EIA-422
input, 100mV p-p minimum.
Formats Supported Speed Range
SMPTE
0.75 to 1.18
EBU 0.80 to 1.33
Film 0.82 to 1.33
MIDI Interface:
5-pin DIN connectors provided for
MIDI In, MIDI Out and MIDI Thru.
General
Dimensions: 19.0W x 3.5H x 13.6D in
(483 x 89 x 346 mm)
19in rack mount standard, 2U high
Net Weight: 18.9 lbs (8.6 kg)
Shipping Weight: 24.5 lbs, (11.1 kg)
Power Requirements: 100/120/220/240 VAC (–10, +5%)
50-60 Hz, 3-pin IEC connector
Power Consumption: 75 VA maximum
Environment
Operating Temperature: 32° to 95°F (0° to 35°C)
Storage Temperature: –22° to 167°F (–30° to 75°C)
Humidity: 95% max without condensation
Safety Approvals: CLA Approval
MODEL 300L SPECIFICATIONS
HEARDINALLTHERIGHTPLACES
3 Oak Park, Bedford, MA 01730-1441 Tel: [phone] Fax: [phone]. E-Mail: [email protected] Web: www.lexicon.com
300L Rear Panel Connections
All specifications are subject to change without notice.
Studio Photo: Tom Gatlin; Courtesy of Masterfonics, Nashville,TN.
300L/0497
©1995, 1997Lexicon