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Sound Performance Lab Loudness Maximizer 9632, Руководство пользователя

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Diagram

The Loudness Maximizers

Limiter does not produce

harmonical distortion

Defining the way the Limiter

sounds and defining if invalid

samples are allowed or not.

You can gain more loudness and also start to manipulate sound

when you choose other than the initial settings for SOFT-HARD
(see 3) or MORE DENSITY (see 4). After having changed these
parameters a readjustment of the DESIRED GAIN is mostly advis-
able.

The SOFT-HARD encoder controls the operation of the Limiter

and influences the sound of the Loudness Maximizer. The control
range is -9 (very soft) to +9 (very hard). The adjusted value is
shown in the LC-display (details see 6).

The higher the adjusted value the harder the sound becomes.

The Loudness Maximizer will allow invalid samples possibly resul-
ting in audible distortion. The Possible LED bar will show you
increasing values (more subjective loudness to gain) the more
the SOFT-HARD control is turned to hard. Use the DESIRED GAIN
control to exploit the additional loudness.

Low SOFT-HARD values (i.e. -9 up to -5) let the Limiter recalcu-

late the original curve on a lower level allowing no invalid
samples at all. This way of operation is very unobstrusive but will
not allow very high loudness maximizations.

The setting of the SOFT-HARD control is an aesthetical question

and extremely dependent on taste and the source material.
Roughness, sharpness and distortion become audible when
critical program material like classical music or single instruments
that show almost sine-wave like waveforms are treated with Hard
settings. In these cases set the SOFT-HARD control between -9
and -3.

Music with a high density in high frequencies or complex

signals can be treated with values between -6 and +3 without
creating audible distortion. Uncritical material like dance floor
productions, jingles or promos may be treated with values
between 0 and +9.

In comparison to other systems with soft and hard limiting the

Loudness Maximizer does not produce additional harmonics.This
phenomenon is a standard problem with other systems leading
to increased sharpness and sound manipulation.

Soft/Hard

3

Loudness Maximizer

9

2

Desired Gain

Содержание Loudness Maximizer 9632

Страница 1: ...Manual Digital Dynamics Processor Loudness Maximizer Model 9632 ...

Страница 2: ...authoriza tion of SPL Limitations of Liability In no event will SPL be liable for any damages including loss of data lost profits cost of cover or other special incidental consequential or indirect damages arising from the use of the unit however caused and on any theory of liability This limitation will apply even if SPL or an authorized dealer has been advised of the possibility of such damage S...

Страница 3: ...ou every success with your new Loudness Maximizer Your Sound Performance Lab Team I would like to start with my thanks to all our staff who created what is to be described here Special thanks go to Jörg Houpert Jörg Mayer Andreas Skäbe and Klaus Peter Webersinke from Spectral Design as well as Harald Obenland from Octum electro nics Our products are often tested and compared in many publica tions ...

Страница 4: ... after processing usually affects the coherence of the signal and causes intermodulation resulting in sound coloration The Limiter works after the Compressor and is designed to cut peak levels effectively by creating a minimum number of invalid samples This is achieved by re calculating the original peak curve on a lower level but maintaining its shape where the Soft Hard control provides access t...

Страница 5: ... operation the external controls access only the sonically relevant parameters Additionally all controls with a wide value range e g 0 to 100 are programmed with an alpha dial logic Turning the encoder rapidly causes the values to jump in steps of 10 whereas turning the encoder slowly causes the values to proceed in single increment steps The housing of the Loudness Maximizer has the standard 19 E...

Страница 6: ...udness Maximizer via a serial port with a standard Z modem cable RS 232 for PC and RS 422 for MAC 2 Open a terminal program like Hyperterminal on PC and make the following adjustments Baud rate 9600 Stop bit 1 Parity none Data bit 8 Handshake no Transfer mode ZMODEM 3 Switch on the Loudness Maximizer and depress both Preset Up and Preset Down until the LC display says wait for Zmodem download 4 Lo...

Страница 7: ...RD sound control and the BOOST function All controls are in the start off positions DESIRED GAIN 0 SOFT HARD 9 MORE DENSITY 0 1 Press ACTIVE LED illuminates 2 Watch the Possible LED chain and adjust the shown value with the DESIRED GAIN for most unobstrusive operation the Possible LED chain should not show negative values 3 If more loudness is wanted turn the SOFT HARD to higher values i e 3 The P...

Страница 8: ... of the signal or the effective loudness respectively by the value entered The DESIRED GAIN encoder is directly coupled with the Possible LED bar see 7 which gives you an initial indication on the setting of the DESIRED GAIN encoder The loudness increase cannot be displayed in standard level or peak meters The Possible LED bar is especially designed to show the possible increase in subjective loud...

Страница 9: ...he additional loudness Low SOFT HARD values i e 9 up to 5 let the Limiter recalcu late the original curve on a lower level allowing no invalid samples at all This way of operation is very unobstrusive but will not allow very high loudness maximizations The setting of the SOFT HARD control is an aesthetical question and extremely dependent on taste and the source material Roughness sharpness and di...

Страница 10: ... to compress audio heavily here is a tip on how to maintain maximum output level Example DESIRED GAIN 8 dB More Density12 This MORE DENSITY setting reduces maximum output level by ca 2 3 dB To compensate for the level difference make these adjustments DESIRED GAIN 11 dB MORE DENSITY 8 Result The compression remains the same and the maximum output level is maintained The BOOST button some call it t...

Страница 11: ...y By combining this analysis with the parameters DESIRED GAIN and SOFT HARD it is possible to compute the loudness yet available in real time The Done LED chain shows how many per cents of the DESIRED GAIN have been gained currently When adjusting the Loudness Maximizer this value should not be under 50 permanently The display especially reacts on the MORE DENSITY control as well as on the stuctur...

Страница 12: ...reset location is found depress Store again The Store LED goes out The preset is stored at the new location In case you want to quit the Store mode without storing the new adjustments simply press Apply If you want to apply various presets depress Apply for one second The Apply LED starts to flash indicating that the Apply mode is activated You can step through the preset list with Up and Down Onc...

Страница 13: ...e AES EBU input will be selected first If you want to select the S P DIF input you have to call up the INFO pages AES EBU input detected Or no AES EBU input detected Press APPLY if AES EBU is detected AES EBU input with wordclock detected Or AES EBU input without wordclock detected Press APPLY S P DIF input detected Loudness Maximizer 13 Info 9 ...

Страница 14: ...clock detected 3 Displaying the detected sample frequency The Sample Frequency will be detected automatically The display either shows 44 1 kHz 48 kHz or 32 kHz 4 Displaying the audio error flag No no error detected Yes error detected 5 Displaying the CRC Error flag No no error detected Yes error detected Loudness Maximizer Info 9 ...

Страница 15: ...y Prohibit flag It is not possible to set a Copy Prohibit flag if there is no Copy Prohibit flag in the processed data 8 Displaying the Original flag No no Original flag Yes Original 9 Displaying the Emphasis flag No no emphasis Yes with emphasis 10 Selecting a serial port RS 232 interface for update download from PC Or Press APPLY RS 422 interface for update download from MAC 15 Info 9 Loudness M...

Страница 16: ...xample that requires different settings for chorus refrain or bridge The Apply LED illuminates indicating that a program change command is received 12 Adjusting the maximum output level In certain applications i e recording to Sony Digital Beta 2dBfs it may be important to maximize loudness to a specific output level that is below the full scale level The Output Level can be set to a lower level t...

Страница 17: ...Tip The Output Level should only be used where the output signal should permanently be lower than 0dB The Output Level setting will be ignored when a MIDI volume change command is present MIDI has first priority Note that the setting in the Output Level page will still show the reduced output level nevertheless a MIDI volume change command may already have reset the output level to a different val...

Страница 18: ...110 Ohms S P DIF co axial 2 SPDIF 2 S P DIF input impedance 75 Ohms Wordclock In Through co axial BNC Wordclock in output impedance 75 Ohms MIDI In Through yes RS 232 PC yes RS 422 MAC max 14 V yes Free download at www spl electronics com Clip display Input transformer AES EBU Output transformer AES EBU Relay Hard Bypass AES EBU Measurements AES EBU Jitter 1ns S P DIF Jitter 3 ns Wordclock In Jitt...

Страница 19: ...authorized SPL warranty repair facility in the country where purchased or to the SPL factory in Germany in the original packaging or a replacement supplied by SPL with all transportation costs and full insurance paid each way by the purchaser or owner All remedies and the measure of damages are limited to the above services It is possible that economic loss or injury to person or property may resu...

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