
     $3.1.2.22 Import MEPEG spl and impedance

     Use the following procedure :


     -Initialize the MEPEG import directory by entering
     -IMPORT -> MEPEG -> INITIALIZE
     -create a new frequency response file (FILE MENU ,
      NEW FREQUENCY RESPONSE)
     -Choose import MEPEG (IMPORT MENU)
     -Choose the file using the cursor or mouse and press (return)

     A message will be displayed, showing the type of curve (spl or
     impedance) that was imported.

     $3.1.2.24 ATB 2.3 Import function

     The SPEAKER PRO 6.0 version supports the import of the following
     ATB 2.3 files :

     APE  : acoustical phase
     IME  : impedance
     EPE  : electrical phase
     ABE  : spl

     Before any ATB files can be imported, the ATB import directory
     has to be installed. (IMPORT -> ATB -> INITIALIZE)

     e.g. C.\ATB2.3\LOG

     Afterwards data can be imported as described already. The
     function is able to distinguish between the different files.

     Any imported files can be shown in the FILE menu choosing the
     EDIT GRAPHIC sub menu.


     $3.1.2.25 DAAS import functions

     SPEAKER PRO 6.0 supports the import of DAAS data. SPEAKER PRO
     6.0 supports the import of spl, impedance and electrical phase.

     In order to import DAAS data, the import directory IMPORT ->
     DAAS -> INITIALIZE has to be initialized.

     e.g. C:\DAAS\DATA

     Afterwards import data can be imported.

     Any imported data can be displayed by chosing DATA -> GRAHIC
     EDITOR.

     $3.1.2.26 LMS import functions

     SPEAKER PRO 6.0 supports the import of LMS data. SPEAKER PRO
     6.0 supports the import of spl, acoustical phase, impedance
     and electrical phase. The type of import file will be auto-
     matically detected.

     In order to import LMS data, the import directory has to be
     initialized. (IMPORT -> LMS -> INITIALIZE)

     e.g. C:\LMS\EXPORT

     Afterwards data can be imported as described already.

     The imported files can be shown by choosing the GRAPHIC EDIT
     in the DATA MENU.
     
     $3.1.2.27 The Imp import functions
 
     SPEAKER allows the import of measurements, carried out with
     the measureing system The Imp. SPEAKER supports the import of
     spl and impedance as well as acoustical and electrical phase.
     
     Speaker supports the import of the following files:

     *.FRD   : frequency response, spl and acoustical phase
     *.ZMA   : impedance and electrical phase
     *.ZFR   : spl, impedance, electrical and acoustical phase

     Before the import of The Imp data can take place, the import
     directory has to be initialized. Import -> IMP -> Initialize
     The pre-adjustment of a 0 dB reference level is necessary.
     This level is initialized at 90 dB.

     e.g.  c:\theimp\export

     Afterwards data can be imported as explained already.

     $3.1.2.28 CLIO import functions

     SPEAKER PRO 6.0 supports the import of CLIO data. SPEAKER PRO
     6.0 supports the import of spl, acoustical phase, impedance
     and electrical phase. The type of import file will be auto-
     matically detected.

     In order to import CLIO data, the import directory has to be
     initialized. (IMPORT -> CLIO -> INITIALIZE)

     e.g. C:\CLIO\DATA\JOBS1

     Afterwards data can be imported as described already.

     The imported files can be shown by choosing the GRAPHIC EDIT
     in the DATA MENU.

     $3.1.2.29 PC-AUDIO LAB import functions

     SPEAKER PRO 6.0 supports the import of PC-AUDIO LAB export data
     files. SPEAKER PRO 6.0 supports the import of spl, acoustical phase,
     impedance and electrical phase.

     In order to import CLIO data, the import directory has to be
     initialized. (IMPORT -> PC-AUDIO LAB -> INITIALIZE)

     e.g. C:\PCLAB

     Afterwards data can be imported as described already.

     The imported files can be shown by choosing the GRAPHIC EDIT
     in the DATA MENU.

     $3.2 Database

     The database consists of any data, necessary to calculate loud-
     speaker enclosures. Various search arguments can be entered to
     find drivers with praticularly specified data.
     The input of new data, using data sheets etc., or own
     TSP measurements (as described later) is possible.
     It is also possible to edit or extend any existing database.

     The SPEAKER PRO 6.0 database supports the following functions:

     - Creation of new database
     - Print-out of database
     - Display of list and selection of drivers
     - Free definitions of search arguments
     - Display of data files found
     - Graphic display of frequency response curves
     - Scrolling frequency response curves
     - Numerical display of frequency response curves
     - Calculation of spl and impedance using TSP
     - Free editing of database
     - Creation of new database using extracts of existing database

     The functions

     - Creation of new database
     - Loading of database
     - Print-out of database

     can all be found in the FILE menu.

     The following command buttons can be used in the database :

     Button          Function
     ================================================================
     >               next file
     <               previous file
     >|              jump to next file matching search criteria
     |<              jump to previous file matching search criteria
     <<              jump to begin of database
     >>              jump to end of database
     Takeover        taking over of currently displayed files and
                     import of defined frequency response files
     More            The second page of the data-sheet
     SearchArgu      Definition of search arguments for the |< and >|
                     functions
     Graph           Display of frequency response curves
     Show            Display of data-sheet (two pages)


     Some extra functions can be used in the EDIT DATA menu :

     Button          Function
     ================================================================
     Save            Saving edited data file
     No Take over    The edited file will be ignored
     New             Adding of data files
     Measr.          Calculation of TSP from a measurement


     List selection
     ==============

     The list selection allows the best view on any available data
     files. Select the files using cursor or mouse functions. The
     following special functions will be supported :

     Enter           Function
     ================================================================
     E e             Editing of selected file
     A a             Display of any available data
     G g             Display of frequency response curves
     Return          Taking over of data file and frequency response
                     curves
     Right mouse
     button          same as return

     Search
     ======
     The search functions which are available in the DATA menu allow
     the quick finding of specified data files. To search such files
     choose -> Search criteria from the DATA menu. It is sufficient
     to enter fragments in the input boxes for type and manufacturer
     such as "V" for VISATON or "DSM" for DSM... dome drivers. After
     entering search arguments, quit the screen using ESC, and choose
     "Search normal display" or "Search list display". If the
     appropriate file or files are available, they will be displayed.
     Choose >| for multiple displays in the "Search normal display"
     mask. The "Search list display" mask will display a list of any
     files available, matching with the search argument.

     Edit data
     =========
     New data can be entered, using the "Edit data" menu. Existing
     data can be edited by simply overwriting. The creation of new
     data files can be carried out with the "New" command. It is
     only possible to quit the mask by either "Save" or "No taking
     over" . In case of "No taking over" any overwriting of existing
     data files will be ignored.

     Any measured frequency response curves can be included to the
     database by entering the *.APL file name. This function provides
     the automatical import of the measurement files after saving
     the database file.

     The function Measr. allows the calculation of TSPs with respect
     to the impedance curve of a driver. Please also note the
     following chapter.

     Display/Editing of frequency response curves
     ============================================
     The frequency response curves can be shown with the "Graphic
     editor" function. The cursor functions can then be used to edit
     the frequency response curves. The following functions are
     available:

     Key                 Function
     ================================================================
     cursor up           increase value
     cursor down         decrease value
     page up             high increase of value
     page down           high decrease of value
     TAB                 select between different curves

     The menu "Numeric editor" allows the numeric editing of
     measurement values.

     Calculation of spl and impedance curves using TSPs
     ==================================================
     For any simulation in the project menu, the spl and impedance
     curves have to be available. In case that measurement curves
     are not available, they can be calculated, using TSPs. This
     also regards partly available curves.

     Creation of database extracts
     =============================
     This function makes use of the search functions in order to
     create  a new database. The new database will entirely consist
     of data files matching with the search criteria. It is for
     example possible to create a new database consisting only of
     DSM.... dome tweeters. In order to achieve this select VISATON
     and DSM as search arguments and then choose the "New DB view"
     menu. Enter the name for the new database in the dialog box
     and choose "Create" to create the new database. The new database
     can be loaded from the FILE menu.

     Graphic scrolling
     =================
     The following functions are possible:

     button        function
     ================================================================
     +             scroll forward to next frequency response curve
     -             scroll backwards to previous frequ. resp. curve
     return        take over current data file and frequency response
                   curve
     ESC           quit


     $3.2.4 Thiele Small parameter measurements

     After selecting MEASR. data, various TSP measurement methods
     can be entered. The program will then calculate the TSPs and add
     the data to the appropriate data file. The tool supports both,
     the weight- and the fixed-volume method. The VISATON TSP data
     have been gathered using a special measuring method, different
     to the methods described above.

     General measuring set-up :

     The following measuring equipment is necessary :

     - Sine-wave generator with constant voltage output
     - Frequency counter
     - Power-amp
     - AC-voltmeter with 200 mV range (20 mV range would be better)
     - Digital ohm-meter

     There are two different measuring methods :
     - Constant current measurement and
     - Constant voltage measurement

     The constant current method uses the following measuring set-up


	Ŀ  Ŀ   1 k
	          Ĵ           oo
	                                      |            |
	Sine wave   Power amp              Voltmeter    Driver
	generator                             |            |
	          Ĵ           oo
	  


     In order to calibrate the measurement set-up, a 10 Ohm precision
     resistor is connected as load. The amplification of the power
     amp has to be adjusted until the voltmeter reading is exactly
     100 mV. If this should not be possible, the 1 kOhm resistor can
     be reduced to 910 Ohms.

     The voltage drop can directly be converted in the impedance,
     using the following formula :

     R = [E] * 100 [Ohms)

     e.g. voltage drop = 10 mV -> impedance = 1 Ohm

     R = 0.01 * 100

     Note : If the maximum output voltage of the generator is 10 V
            or more, no power amp will be needed.



     The constant voltage method uses the following measuring set-up


	Ŀ  Ŀ       0.22 
	          Ĵ           o
	Sine-wave   Power amp                              |
	generator                 o--Voltmeter--o         Driver
	                                                     |
	          Ĵ           o
	  



     In order to calibrate the measuring set-up, a 10 Ohm precision
     resistor has to be connected as load. The amplification of the
     power amp has to be adjusted until the voltmeter reading is
     exactly 100 mV. The impedance is reciprocal to the voltage.

     R = 1/(V)  [Ohm]

     e.g. Measured voltage : 100 mV -> 0.1 V -> impedance : 10 Ohms

     Note:
     This measuring method requirs a power amp.

     Measurement :

     At first, the driver will be measured without test enclosure or
     added weight. The following parameters can be generated :

     - Re    Ohmic resistance of the driver.
             This parameter can be measured with a digital Ohm-meter.

     -Fs     Resonance frequency of the driver
             This parameter can be measred be altering the frequency
             of the generator until the first impedance maximum is
             found. The impedance at the resonance frequency is Zres.

     -Zres   See Fs

     -f1     f1 is the frequency below resonance where the value of
             the impedance is equal to the square root of (Zres*Re).
             Note :
             After entering the parameters Zres and Re in the input
             mask, f1 will be calculated automatically.


     -f2     f2 is the frequency above resonance where the value of
             the impedance is equal to the square root of (Zres*Re).
             Note :
             After entering the parameters Zres and Re in the input
             mask, f1 will be calculated automatically.


     -d      d is the diameter of the cone.
             The diameter is measured from the middle of the
             surround.

     The measured values have to be entered in the input mask. After-
     wards the following measurements can be generated by using the
     test volume - or the adding weight method. The method can be
     selected in the menu. The selected method will be displayed in
     the top right corner of the mask.


     Measurement with test-volume

     In order to measure the TSP's of a driver, the speaker has to
     be mounted i a specific sealed and undamped enclosure.
     The volume for drivers up to 17cm should be 5-10 liters. For
     larger drivers, the volume has to be increased respectively.
     The impedance response curve can be used to generate the
     following data :

     - Fs_new         Shifted resonance frequency of the driver.
                      The frequency can be found by altering the
                      frequency of the generator until an impedance
                      maximum is found. Please write down the fre-
                      quency and the value of the impedance.
                      (Zres_new)


     - Zres_new       see above chapter Fs_new

     Enter the values

     - Vol            The volume of the sealed enclosure

     After choosing calculate, the resulting TSP's will be calculated
     and entered in the RAM database. Please note that the entered
     data have to be saved, by choosing the save data function of
     the mask.

     Adding weight measuring method

     In this measuring method, the TSP's will be calculated by adding
     a specified weight to the moved mass of the cone. The best way
     of adding weight is to use adhesive rubber paste or small
     magnets with a specified weight.
     The weight of the added mass should be equivalent to the moved
     mass of the driver. The following parameters can be generated
     from the new impedance curve :

     - Fs_new            The shifted resonance frequency of the
                         driver. The frequency can be found by
                         altering the generator frequency until
                         the impedance maximum is found. Write
                         down the frequency and the value of the
                         impedance maximum.

     - Zres_new          The frequency at the new impedance maximum.

     Enter the values.

     - Ma                Added mass

     By choosing calculate, the resulting TSP's will be calculated
     and added to the RAM database. Please note that the data have
     to be saved, by choosing the appropriate command of the mask.

     $3.3  Graphic editor and Numeric editor

     This program point allows a pre-selection of driver data before
     starting a speaker project. It is possible to pre-view the
     graphic or numeric frequency response curves of a driver before
     starting a project or furthermore to edit the displayed data.
     Any data displayed will be saved in a file with the extention
     *.APL .

     Any available data of frequency response curves can be viewed
     or edited.
     The graphic mode allows an editing method similar to equalizer
     functions. Using the keys, cursor up, cursor down, page up and
     page down, frequency response curves can be edited. The cursor
     functions left and right can be used to select the frequency
     of the curve to be edited. The HOME and END functions of the
     keyboard can be used to go to the begin or the end of a fre-
     quency response curve. The TAB key allows the switching
     between diffrent curves. The position of the cursor will be
     marked by a small cricle. All four frequency response curves
     will be displayed in diffrent colors.
     After initializing a new curve, the impedance will be 8 Ohm
     linear, the spl 90 dB and the phase 0 degree.

     The frequency response curves can be loaded in the "File"menu.

     The frequency response curves can be edited by +/- 3dB using
     the page up/down- or +/- 0.25 dB using the cursor functions.

     The impedance curve can be edited by +/- 2 Ohms, using the
     page up/down functions or +/- 0.1  using the cursor functions.


     Frequency response curves numeric

     As an alternative to the graphic mode, the frequency response
     curves can also be edited in the numeric mode. Any value can
     be selected and edited by using mouse or cursor functions.

     $3.4 Simulation / Project

     This is the most powerful tool of the software package. It
     allows the simulation of a complete multi-way speaker system,
     consisting of up to five ways. The simulation respects
     the enclosure- , the crossover- and the individual driver
     functions, specified in the database, respecting spl, impedance,
     electrical- and acoustical phase. The tool can therefore be
     judged as a cost- and time saving instrument for the development
     of speaker systems.

     The effect of the enclosure can be left out of the simulation
     if only the frequency response curves of drivers, specified in
     the database, should be taken into consideration for the con-
     struction of crossover networks.

     The import of computer-aided measurements is possible, as well as
     individual data editing.

     The description of a multi-way speaker is defined as project.

     A project therefore comprises the speaker data and frequency
     response curves, the enclosure functions and the crossover
     networks specified for up to five ways.

     The professional speaker designer can use the existing
     measurement facilities of his own lab, and the amateur has
     the advantage to use the VISATON database or to edit driver
     data for the development of individual speaker projects.

     Please note the different modes for the import of impedance
     curves.

     1. Unspecified

     This mode should be used if the impedance curve has been
     measured a specified enclosure.

     2. Sealed / Vented / Bandpass

     If one of the above mentioned modes is aplied, the impedance
     of the driver will be simulated in accordance to the selected
     and specified enclosure.

     The influence of the enclosure on the frequency response curves
     will be simulated and hence respected for further project
     operations.  This includes the electrical and acoustical feed-
     back functions of the selected enclosure type.

     The resulting frequency response curves will be displayed.
     Any parameters can be alterd to judge the effect on the
     frequency response curves of a multi-way speaker system.

     The following parameters can be defined :

     - Woofer with specified enclosure and crossover
     - Low-midrange with specified enclosure and crossover
     - Midrange with specified enclosure and crossover
     - Highrange with specified enclosure and crossover
     - Super-highrange with specified enclosure and crossover

     The sequence of the specified drivers can be altered by the
     user e.g. in order to define a second woofer instead of using
     a super-tweeter, meaning that all five possible ways of the
     speaker simulation can be individually defined.
     The program also supports a parallel conection of drivers,
     regarding both, spl and impedance, of up to 99 drivers !
     It is either possible to define a parallel connection of
     drivers selecting "Parallel" or to define a bi-wiring connection
     by selecting "Alone".

     The sound origin of the driver will be taken into consideration,
     when simulating multi-way systems.

     Zobel- and Rc networks can be calculated or defined.

     Input boxes will allow to describe the project.

     Please note that at first a new project has to be defined or an
     existing project has to be loaded. If the "New project" menu has
     been chosen, any new input variables can be defined.

     Note :
     If the enclosure effects should not be considered for the
     simulation, the "Take over data" function can be ignored.


     $ Graphic print-outs

     A hard copy print-out of graphic displays is possible if an
     IBM compatable printer is used and the appropriate driver is
     available. For VGA, EGA and CGA cards, the GRAPHICS.COM
     comand should be entered under DOS before starting SPEAKER
     PRO 6.0 .

     If the print-out should not be possible, you can install
     SPEAKER PRO 6.0 under WINDOWS. Please read the instructions
     of your WINDOWS version in your WINDOWS manual.

     $5.1 Print-out of text and masks

     The ASCII code is used for printing out text files and masks,
     using the hard copy command of your computer.

     $7. Licence agreements

     The licence agreements considering the use of the SPEAKER
     PRO 6.0 software package are printed on page 24 of the
     Quick Introduction manual.











































