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Sony SRP-L300 Operating Instructions Manual
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Sony SRP-L300 Operating Instructions Manual

Sony SRP-L300 Operating Instructions Manual

Digital limiter/delay
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Digital Limiter/Delay
SRP-L300
Operating Instructions
INPUT LEVEL
OUTPUT LEVEL
INPUT
CH-1
CH-2
CH-1
CH-2
OVER
ANALOG
0
0
0
0
POWER
DIGITAL
-
PLL
LIMITER / DELAY
−12
+12
−12
+12
−12
+12
−12
+12
ON
OFF
dB
dB
dB
dB
Before operating, please read this manual carefully.
Be sure to keep it properly for future reference.
© 2001 Sony Corporation
ADJUST
SELECT
EDIT
PROGRAM
LOCK
−
+
−
+
CH-1
SYNC
EXIT/NO
BYPASS
CH-2
30
27
24
21
18
15
12
9
6
3
1 OVER/GR(dB)
PUSH ENTER/YES
DIGITAL LIMITER/DELAY SRP-L300

Table of Contents

Warning .........................................
Precautions ....................................
1. Outline .....................................
2. Glossary ...................................
4. Basic Operation.......................
5. Internal Signal Flow ...............
Block ........................................
7. Parameter Change ..................
9. Lock Functions ........................
11. Main Specifications ................
Preset Program .............................
2-346-314-11(2)
2
3
5
6
7
10
11
13
25
31
36
40
41
42
43
1

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Summary of Contents for Sony SRP-L300

  • Page 1: Table Of Contents

    LIMITER / DELAY −12 −12 −12 −12 PUSH ENTER/YES DIGITAL LIMITER/DELAY SRP-L300 Block ........Before operating, please read this manual carefully. 7. Parameter Change ....Be sure to keep it properly for future reference. 8. Program Store and Recall ..

  • Page 2: Warning

    WARNING Notice for the Customers in the United Kingdom IMPORTANT The wires in this mains lead are coloured in accordance with the following code: Blue Neutral Brown : Live As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows: The wire which is coloured blue must be connected to the...

  • Page 3: Precautions

    Do not throw away the carton and the packing material. It makes an ideal container for transporting the unit. When shipping the unit for repair work or to another location, repack it as it was. If you have any questions or problems concerning your unit, consult your nearest Sony dealer.

  • Page 5: Outline

    Excellent sound quality ensured by high-performance A/D and D/A converters The SRP-L300 is provided for the dynamic range of 105 dB or more and the converter with 20-bits resolution high- precision sampling rate A/D and D/A converter system with 48 kHz sampling rate.

  • Page 6: Glossary

    The program number, program name, and algorithm type (a,b. etc) in the upper row, the level meter is displayed in the second row. Together, this is called “default display state”. DYNAMICS(A) In the default display state, the SRP-L300 waits for the user operation with the whole In = CH-1 CH-2 operation state exited.

  • Page 7: Controls And Functions

    The INPUT LEVEL knobs are used to adjust the The PLL indicator indicates that a digital signal is level of the input signals from the analog input properly transmitted and that the SRP-L300 receives terminals. In the center position (0 dB), a internally head room...
  • Page 8 !¢ LOCK button and LOCK indicator Press this button to lock the operation of the SRP-L300 and to prevent the state at that time from being changed easily. The LOCK indicator lights when the SRP-L300 is locked.
  • Page 9 Analog audio signals are input to the ANALOG INPUT terminals. The DIGITAL THRU terminal is used to input the (The terminal is XLR-3-31.) digital input signal of the SRP-L300 directly to other Electronic balancer circuit equipment. (1: GND, 2: HOT, 3: COLD)

  • Page 10: Basic Operation

    4. BASIC OPERATION The flow of basic operation is described below. For more details of each operation, refer to the corresponding pages. Recall one of the P01, P02, and P03 preset programs corresponding to the algorithm used. For the algorithm, refer to page 13. For the recall operation, refer to page 32.

  • Page 11: Internal Signal Flow

    5. INTERNAL SIGNAL FLOW 5-1. Block Diagram (Including the A/D, D/A, and DIO Blocks) The signal flow in the SRP-L300 is shown in the figure below. CH-1 STACKING CH-2 OVER OUTPUT LEVEL CH-1 ANALOG OUTPUT ANALOG INPUT CH-1 CH-2 Digital...
  • Page 12 A/D and D/A conversion and to fully show the performance of the conversion block when the input level differs from the reference input level (+4 dBu) of the SRP-L300 or when the signal (e.g., Playback signal of recording media) whose maximum level can be predicted is input.

  • Page 13: Digital Signal Processing Block

    6. DIGITAL SIGNAL PROCESSING BLOCK The SRP-L300 mounts the following three signal processing algorithms. (A) Dynamics algorithm (B) DAL-1000 algorithm (C) Tap delay algorithm As shown below, the three algorithms contain input, output, and bypass blocks in common with one another.
  • Page 14 6-1. Input Block The input block selects input signals and adjusts the level of the input signals. CH-1 ANALOG INPUT CH-2 TO MAIN BLOCK CH-1 CH-1 DIGITAL INPUT CH-2 TO MAIN BLOCK CH-2 1D-IN Level 3Input Level TO INPUT LEVEL METER 2Input Select Parameter 1 D-IN Level...
  • Page 15 6-2. Bypass Block FROM INPUT BLOCK CH-1 OUTPUT BLOCK TO CH-1 FROM MAIN BLOCK CH-1 FROM INPUT BLOCK CH-2 OUTPUT BLOCK TO CH-2 FROM MAIN BLOCK CH-2 BYPASS ON BYPASS OFF This block switches using the “BYPASS” button on the front panel. However, the switching is not contained as a parameter in the program.
  • Page 16 6-4. Main Block 6-4-1. (A) Dynamics algorithm The dynamics algorithm consists of four independent blocks; a compressor, gate/ expander, limiter, and delay. (Processing block diagram in CH-1. (The processing block diagram in CH-2 is same as for CH-1.)) !ªDynamics @ºOn/Off !•Dynamics Delay @¡Threshold Level...
  • Page 17 4 COMPRESSOR Release This parameter sets the release time of the compressor operation. AUTO, 47 to 4700 [msec] The release time is automatically switched according to the input signal level when the parameter is set to AUTO. 5 COMPRESSOR Side EQ An equalizer is used for the trigger signal of the compressor operation.
  • Page 18 !º EXPANDER On/Off This parameter sets the expander/gate ON/OFF operation. ON / OFF !¡ EXPANDER Attack This parameter sets the attack time of the expander/gate operation. 0.1 to 1000 [msec] !™ EXPANDER Hold This parameter sets the hold time of the expander/gate operation. 47 to 4700 [msec] !£...
  • Page 19 Parameters related to compressor and expander/gate !• DYNAMICS Delay This parameter sets the delay time in a compressor and expander. A “zero attack” can be virtually carried out by setting the delay time corresponding to the attack time. 0.0 to 500.0 msec !ª...
  • Page 20 6-4-2. (B) DAL-1000 algorithm This is an algorithm for which the Sony digital audio limiter (DAL-1000) was implemented. The algorithm can raise the average level of a digital signal in which the head room was ensured to prevent a hard clip from occurrence and that was converted from analog to digital in a lower level.
  • Page 21 CH-1 DAL-1000 processing Delay CH-1 FROM INPUT BLOCK TO BYPASS BLOCK DAL-1000 processing CH-2 Delay CH-2 1 DAL Type 4Delay 3Level 2 DAL Ratio Parameters 1 DAL Type This parameter specifies whether to set the type to A or B. TYPE A / TYPE B 2 DAL Ratio This parameter sets the amount of a DAL effect:...
  • Page 22 Parameters 1 Pre Delay This parameter sets the pre-delay time that collectively delays only the delay sound: 0.000 to 500.000 msec. 2 Delay Level This parameter sets the level of the whole delay sound when the original sound is mixed with the delay sound: –∞, –60 to 0 dB (in units of 0.5 dB).
  • Page 23 1 OVER/GR(dB) LIMITER / DELAY The level meter of the SRP-L300 is a peak meter based on a digital signal. It has a peak hold function of about one second. Moreover, the level meter with contents below can be switched and displayed.
  • Page 24 –9 dBFS and when the knob is set to +12 dB. Notes • The level meter of the SRP-L300 displays the peak value based on a digital signal. Therefore, the user may feel that the display level is higher than for the effective value display or VU meter value.

  • Page 25: Parameter Change

    7. PARAMETER CHANGE The effect of sound can be changed by changing the parameter value while monitoring the liquid-crystal display. This operation is called “edit.” The range or unit of a change value in these parameters differs. However, the procedure for change is almost the same. The basic procedure of the edit is described next.
  • Page 26 To change the lastly displayed parameter again The user can skip to the edit state of the latest displayed parameter by pressing the button only once even if other operations are executed after parameter setting or even if the ADJUST default display state is returned by the “EXIT”...
  • Page 27 7-2. Sync 7-2-1. Sync The SRP-L300 has two channel input/output terminals and processes internal signals for each channel. The operation for interlocking the parameters in two processing channels for change is called sync. The parameter to be changed at that time is called a sync parameter.
  • Page 28 7-2-3. How to use the SYNC button To set CH-1 and CH-2 parameters separately with the parameters synchronized currently SELECT − Turn the “SELECT” knob to display “parameter name InputLevel <SYNC <SYNC” during edit operation. (The SYNC indicator 0.0 [dB] CH-1 CH-2 lights.)
  • Page 29 (The minimum delay time is the time required for A/D conversion, internal transmission, and D/A conversion.) •The digital input/output of the SRP-L300 are the non-synchronous, then they cannot be used under synchronous facilities. When using the SRP-L300 for video editing, use the analog input/output.
  • Page 30 7-3-2. Setting the display unit of delay time The display unit for setting the delay time by edit operation can be specified from among the following. [msec] : Displays in units of time. [samples] : Displays in units of sampling periods. One sample is 1/48,000 seconds (about 0.0208 msec.).

  • Page 31: Program Store And Recall

    The signal processing state at that time, that is, the setting state of algorithms and parameters used is called a “program.” In the SRP-L300, a maximum of 20 “programs” can be stored in internal nonvolatile memory. After that, the “programs” can be recalled to reproduce the operation state in which they were stored.
  • Page 32 8-2. Using the recall program The recall function is used to recall and execute the programs stored in memory as a temporary program. After the recall operation is selected, do the following procedure. The program number blinks when “PROGRAM DYNAMICS(A) RECALL”...
  • Page 33 8-3. Using the Store Program The store function is used to assign a name to the contents of a temporary program and memorize it in the internal memory. After the store operation is selected, do the following procedure. The program number that can be stored blinks (in the P01 DYNAMICS(A) rower line) when “PROGRAM STORE”...
  • Page 34 8-4. Using the Delete Program The delete function is used to delete the unnecessarily stored program. After the delete operation is selected, do the following procedure. The program number blinks when “PROGRAM User01 (A) DELETE” is selected. PROGRAM DELETE CH-1 CH-2 1 OVER/GR(dB) SELECT...
  • Page 35 8-5. Using the Protect Program The protect function is used to protect the stored program from being deleted or overwritten accidentally. After the protect operation is selected, do the User01 (A) following procedure. PROGRAM PROTECT CH-1 CH-2 The program number blinks when “PROGRAM 1 OVER/GR(dB) PROTECT”...

  • Page 36: Lock Functions

    9. LOCK FUNCTIONS The lock function is used to prevent the completed setting from being changed accidentally. The two types of lock functions below are available. A Simple lock : Any user can unlock in a simple unlock procedure. B Code lock : Four-digit identification (ID) numbers are assigned for locking.
  • Page 37 A. When a simple lock is selected The confirm message on whether to lock is displayed. SURE?(Lock) SimpleLock CH-1 CH-2 1 OVER/GR(dB) SELECT − Press the “SELECT” button. (To stop the lock Lock stop operation, press the “EXIT” button.) EXIT/NO PUSH ENTER/YES √...
  • Page 38 9-2. Unlock Procedure Press the “LOCK” button. LOCK The next operation varies depending on the lock state. A. When the lock state is a simple lock The message on whether to unlock is displayed. SURE?(Unlock) SimpleLock CH-1 CH-2 1 OVER/GR(dB) Press the “SELECT”...
  • Page 39 B. When the lock state is a code lock Enter four-digit lock codes (identification (ID) Enter Lock Code numbers) in the same procedure as during lock. - - - - CH-1 CH-2 Enter the same numbers as the lock codes entered 1 OVER/GR(dB) during lock for unlock.

  • Page 40: Digital Input And Output

    Deemphasis filter converter The digital signal input to the SRP-L300 is converted into a sampling frequency of 48 kHz using a sampling rate converter. For the sampling frequency of the input signal, 32 kHz, 44.1 kHz, or 48 kHz can be received.

  • Page 41: Main Specifications

    11. MAIN SPECIFICATIONS Input/output interface : XLR-3-31 type × 2 Analog input Terminal Circuit : Electronic balanced circuit (1: GND, 2: HOT, 3: COLD) Input impedance : 33 kΩ Reference input level : +4 dBu Maximum input level : +24 dBu A/D conversion sampling frequency : 48 kHz A/D resolution : 20 bits...

  • Page 42: External Dimensions

    SELECT INPUT LEVEL OUTPUT LEVEL EDIT PROGRAM LOCK INPUT CH-1 CH-2 CH-1 CH-2 − − OVER ANALOG CH-1 CH-2 SYNC EXIT/NO BYPASS POWER DIGITAL 1 OVER/GR(dB) LIMITER / DELAY −12 −12 −12 −12 PUSH ENTER/YES DIGITAL LIMITER/DELAY SRP-L300 Unit: mm...

  • Page 43: Preset Program

    Preset Program Description and Parameter SettingOutline Twelve preset programs (P01 to P12) have been installed in advance in the SRP-L300. P01 to P03 are a default program of each algorithm. They are used when a program is newly created. P01 to P03 set no effect independently.
  • Page 44 Parameter used as setting point (Block) (Parameter name) (Paramter setting) Main block Delay 38.583 [msec] (= 1852 [samples]) Note When using the SRP-L300 for video editing, use the analog input/output. The SRP-L300 cannot be used under synchronous facilities of digital input/output.
  • Page 45 Cmp&Gate (A) P06 is a control example in which the level is equalized using a (A) DYNAMICS algorithm. • Compressor The compressor raises a low-level signal, suppresses a high-level signal, equalizes the level of an input signal, then outputs it (Fig. 1 on page 47). A unity gain is almost obtained when the input level is –20 [dBFS].
  • Page 46 PA Limit (A) P07 is a setting example of a limiter for PA application using a DYNAMICS algorithm (Figs. 2 on page 47). • Compressor The compressor reduces the gain so as to protect an amplifier or speaker when the threshold level is more than –20 [dBFS].
  • Page 47 Fig. 1 Relation between Input/ –35 Output Levels in P06 (Compressor and Gate) –100 –80 –60 –40 –20 (The dotted line indicates the case where the “Compressor Threshold” was changed.) –20 –40 –60 –80 –100 Fig. 2 –100 –80 –60 –40 –20 Relation between Input/...
  • Page 48 Limiter (A) P08 is a program in which the compressor is used as a peak limiter. A distortion-free peak limiter is obtained when this compressor is used instead of the limiter in the later stage of an algorithm. Set the threshold (compressor threshold) level according to the level you wish to limit.
  • Page 49 De-Esser (A) P09 is a dossier program in which a DYNAMICS algorithm is used. It is an example in which the frequency sensitivity was set using the side equalizer of a compressor. A side equalizer is set in the bandpass filter, and the fricative sound of a human voice is extracted and used as a trigger signal for compressor operation.
  • Page 50 DAL A50% (B) P10 is a program in which a DAL-1000 algorithm is used by type A with a ratio of 50%. The variable parameter of a DAL-1000 algorithm is only a type (DAL type) and ratio (DAL ratio effect value). Therefore, this algorithm requires no complicated adjustment and can obtain a constant gain.
  • Page 51 • Effect of signal on fine peak values The level meter of the SRP-L300 is a peak meter for both input/output signals and gain reduction. The level meter display is higher in value than the effective value or VU display.
  • Page 52 Sony Corporation Printed in Japan Printed on recycled paper...

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