主题：常见电声设计软件

Many thanks to Angel Fdez.-Escalante Bárcena for the manuals/tutorial in Spanish and Roland Schirmer for the tutorial in German

Executable 
1) Download and unzip the file, drop the contents in the folder for LspCAD 6 in your PC. (No special key is needed this time.

Build history
LspCAD 6.31 (2006-08-29)
+ Crossover emulator
 + Digital input working (ASIO mode)
  + Int24, Int32 and Float32 support.
  + Security measure to avoid lockups under high CPU load conditions introduced.
 + Crash bugs related to store/recall and also project save/switch solved
 + Complexity of circular convolution reduced somewhat. 
 + Excessive memory usage in digital filters fixed.
 + Emulator streaming temporarly stopped when Recall buttons pressed
+ Optimizer
 + Opt switch in groups not saved in project files 
 + Store/Recall buttons disabled when optimizer running
+ Store/Recall buttons
 + Recall executed twice by mistake when recall button pressed.
 + Log10 sing error related to the use of GS, DCX, DBXpro and XTA components fixed.

上面是LSPCAD6.31最新升级包,可以直接下载!

LspCAD 6.30 (2006-06-07)
+ Optimizer
  + Setup of optimization simplified as "optimize with respect to .." setting is removed
  + XO point lock is improved with a lower risk of divergent behavior.
  + Grouped components has a main optimize checkbox option, this makes it
     possible to turn off optimization for entire filter sections with just
     one operation
+ Crossover emulator
  + ASIO support, possible to select input pair for multi channel input ASIO cards.
  + Emulator was not closed correctly in certain conditions.
  + Emulator is always on top.
  + Noise bursts when R1..R8 buttons used removed
+ Store/recall sets saved at correct locations, for instance if one click on S3 and
   save the project the set will be available at R3 when the project is opened again.
+ Possible to set orientation of T/S drivers, side mounted drivers now possible to model.
+ Snapshot, a few bugs fixed.
+ Schema, can be printed with option fit meaning that the schema printout fills the entire paper.

LspCAD 6.20 (2005-11-23)
+ Klippel TS import, Sd, Vas and Mmd was not imported properly

LspCAD 6.20 (2005-09-20)
+ KHF tool !, a universal tool for merging and adding SPL data.
+ New diffraction simulation , including 2nd order reflections and off-axis behavior.
+ Near boundary reflection simulation .
+ Advanced box simulation mode for closed/bassreflex/passive radiator and bandpass boxes.
  This is gives almost the same looks to the box modeling as in good old LspCAD 5!.
  This feature works for the boxes defined in the template section.
+ Voltage graph (pro version)
+ Current graph (pro version)
+ Transformer component takes N1:N2 ratio instead of 1:N ratio,
  component could sometimes give unstable results (fixed)
+ Schema scroll position unique for every project.
+ Store / Recall (S1...S8, R1..R8) presets completely redone.
  This time all components are stored/recalled, it is also possible to change topology between the sets.
+ Last opened project files displayed in the File menu
+ Recompute Mmd/Mms bug fixed.

LspCAD 6.10 (2005-03-31)
+ Optimizer, lockup problem fixed, problem related to imported targets only
+ Snapshot Open and Save As functionality
+ Nonlinear BL(x) and Cms(x) modeling (pro version only) , two options, SWEPT mode or based on PSD.
+ Nonlinear port modeling (pro version only).
+ Store / Recall, all components except Driver / TS driver components have store
   recall functionality.
   NOTE THAT The store recall sets are not saved with the project...
+ TS parameters, occasional odd values when parameters added
+ Negative angles possible in imported polar response
+ Port component, possible to increase loss

LspCAD 6.00 (2005-02-09)
+ Optimizer, some passive components was accidentally listed several times in the checklist box.
+ Complex impedance component, this component makes it possible to import e.g the measured impedance of an inductor. This can be useful in cases where e.g the skin effect of a real inductor makes the built in inductance model less accurate.
+ Dissipated power over resistors (pro version only). If termal modeling is enabled (see ch 8 in manual) the computed power dissipation in resistors is presented in the component list. Note that for best match with reality it is recommended to import one of the PSD files located in the lib folder as the power spectral density of the music clips has an impact on how the heat is distributed over the components.
+ Store/recall buttons. **This feature is still under construction**. One limitation is that the stores values are not yet saved. Another limitation is that this currently works ONLY FOR passive components. Both limitations above will be resolved in a later build.

LspCAD 6.00 (2005-02-02)
+ Inverting drivers did not have an effect in the crossover emulator + Optimizer, a checklist box is added where one can switch on or off the main optimization switch for passive components (click on the button with caption ">>>" in upper left corner in optimizer dialog to see list)

有很多改进和与众不同之处!

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 QB3 VENTED-BOX ALIGNMENTS

                 +----------------------------------------------+

                 | QL=7 |  Qts |  h   |   a   | f3/fs | Peak-dB |

                 |------+------+------+-------+-------+---------|

                 |      | 0.10 | 3.84 | 34.39 |  5.22 |   0.00  |

                 |      | 0.12 | 3.21 | 23.55 |  4.33 |   0.00  |

                 |      | 0.14 | 2.75 | 17.02 |  3.70 |   0.00  |

                 |      | 0.16 | 2.41 | 12.77 |  3.21 |   0.00  |

                 |      | 0.18 | 2.15 |  9.86 |  2.83 |   0.00  |

                 |      | 0.20 | 1.94 |  7.78 |  2.53 |   0.00  |

                 |      | 0.22 | 1.77 |  6.24 |  2.28 |   0.00  |

                 | QB3  | 0.24 | 1.63 |  5.07 |  2.06 |   0.00  |

                 |      | 0.26 | 1.51 |  4.15 |  1.88 |   0.00  |

                 |      | 0.28 | 1.40 |  3.43 |  1.72 |   0.00  |

                 |      | 0.30 | 1.31 |  2.84 |  1.57 |   0.00  |

                 |      | 0.32 | 1.24 |  2.37 |  1.44 |   0.00  |

                 |      | 0.34 | 1.17 |  1.97 |  1.33 |   0.00  |

                 |      | 0.36 | 1.11 |  1.64 |  1.22 |   0.00  |

                 |      | 0.38 | 1.06 |  1.36 |  1.12 |   0.00  |

                 |      | 0.40 | 1.01 |  1.11 |  1.02 |   0.00  |

                 |------+------+------+-------+-------+---------|

                 |      | 0.42 | 0.97 |  0.91 |  0.94 |   0.01  |

                 |      | 0.44 | 0.93 |  0.73 |  0.86 |   0.14  |

                 |      | 0.46 | 0.90 |  0.57 |  0.80 |   0.56  |

                 | SQB3 | 0.48 | 0.87 |  0.43 |  0.75 |   1.32  |

                 |      | 0.50 | 0.83 |  0.31 |  0.71 |   2.46  |

                 |      | 0.52 | 0.81 |  0.20 |  0.68 |   4.01  |

                 |      | 0.54 | 0.79 |  0.10 |  0.66 |   6.08  |

                 |      | 0.56 | 0.77 |  0.01 |  0.64 |   8.87  |

                 +----------------------------------------------+

 

 

C4 VENTED-BOX ALIGNMENTS

                 +----------------------------------------------+

                 | QL=7 |  Qts |  h   |   a   | f3/fs |Ripple-dB|

                 |------+------+------+-------+-------+---------|

                 |      | 0.26 | 1.05 |  3.68 |  2.23 |   0.00  |

                 |      | 0.28 | 1.08 |  3.24 |  1.94 |   0.00  |

                 |      | 0.30 | 1.10 |  2.80 |  1.71 |   0.00  |

                 |      | 0.32 | 1.11 |  2.40 |  1.53 |   0.00  |

                 | SC4  | 0.34 | 1.10 |  2.01 |  1.37 |   0.00  |

                 |      | 0.36 | 1.08 |  1.67 |  1.23 |   0.00  |

                 |      | 0.38 | 1.05 |  1.37 |  1.12 |   0.00  |

                 |      | 0.40 | 1.01 |  1.11 |  1.02 |   0.00  |

                 |      | 0.42 | 0.97 |  0.91 |  0.94 |   0.00  |

                 |      | 0.44 | 0.92 |  0.75 |  0.87 |   0.00  |

                 |------+------+------+-------+-------+---------|

                 |      | 0.46 | 0.88 |  0.63 |  0.81 |   0.01  |

                 |      | 0.48 | 0.84 |  0.54 |  0.76 |   0.03  |

                 |      | 0.50 | 0.80 |  0.46 |  0.72 |   0.07  |

                 |      | 0.52 | 0.77 |  0.41 |  0.68 |   0.12  |

                 |      | 0.54 | 0.74 |  0.36 |  0.65 |   0.19  |

                 |      | 0.56 | 0.72 |  0.33 |  0.63 |   0.27  |

                 |  C4  | 0.58 | 0.70 |  0.30 |  0.61 |   0.36  |

                 |      | 0.60 | 0.68 |  0.27 |  0.59 |   0.46  |

                 |      | 0.62 | 0.66 |  0.25 |  0.57 |   0.57  |

                 |      | 0.64 | 0.65 |  0.24 |  0.56 |   0.68  |

                 |      | 0.66 | 0.64 |  0.22 |  0.55 |   0.80  |

                 |      | 0.68 | 0.62 |  0.21 |  0.54 |   0.92  |

                 |      | 0.70 | 0.61 |  0.19 |  0.53 |   1.05  |

                 |      | 0.72 | 0.60 |  0.18 |  0.52 |   1.17  |

                 +----------------------------------------------+

 

 BB4 VENTED-BOX ALIGNMENTS

                 +----------------------------------------------+

                 | QL=7 |  Qts |  h   |   a   | f3/fs | Peak-dB |

                 |------+------+------+-------+-------+---------|

                 |      | 0.20 | 1.00 |  5.90 |  3.37 |   0.00  |

                 |      | 0.22 | 1.00 |  4.85 |  2.95 |   0.00  |

                 |      | 0.24 | 1.00 |  4.05 |  2.60 |   0.00  |

                 |      | 0.26 | 1.00 |  3.43 |  2.29 |   0.00  |

                 | SBB4 | 0.28 | 1.00 |  2.94 |  2.02 |   0.00  |

                 |      | 0.30 | 1.00 |  2.54 |  1.79 |   0.00  |

                 |      | 0.32 | 1.00 |  2.22 |  1.60 |   0.00  |

                 |      | 0.34 | 1.00 |  1.96 |  1.44 |   0.00  |

                 |      | 0.36 | 1.00 |  1.74 |  1.31 |   0.00  |

                 |------+------+------+-------+-------+---------|

                 |      | 0.38 | 1.00 |  1.54 |  1.21 |   0.01  |

                 |      | 0.40 | 1.00 |  1.39 |  1.13 |   0.14  |

                 |      | 0.42 | 1.00 |  1.25 |  1.07 |   0.37  |

                 |      | 0.44 | 1.00 |  1.13 |  1.02 |   0.66  |

                 |      | 0.46 | 1.00 |  1.03 |  0.98 |   1.00  |

                 |      | 0.48 | 1.00 |  0.94 |  0.94 |   1.36  |

                 |      | 0.50 | 1.00 |  0.86 |  0.91 |   1.74  |

                 |  BB4 | 0.52 | 1.00 |  0.79 |  0.89 |   2.13  |

                 |      | 0.54 | 1.00 |  0.73 |  0.87 |   2.53  |

                 |      | 0.56 | 1.00 |  0.67 |  0.85 |   2.93  |

                 |      | 0.58 | 1.00 |  0.63 |  0.84 |   3.33  |

                 |      | 0.60 | 1.00 |  0.58 |  0.83 |   3.73  |

                 |      | 0.62 | 1.00 |  0.54 |  0.82 |   4.12  |

                 |      | 0.64 | 1.00 |  0.50 |  0.81 |   4.51  |

                 |      | 0.66 | 1.00 |  0.47 |  0.80 |   4.90  |

                 |      | 0.68 | 1.00 |  0.44 |  0.79 |   5.27  |

                 |      | 0.70 | 1.00 |  0.41 |  0.78 |   5.65  |

                 +----------------------------------------------+

 

 

 DESIGN TABLES FOR VENTED-BOX ALIGNMENTS

 

      When designing  a vented-box  system, it  should be  kept in  mind that

      there are  many combinations  of h  and a  that can  be used  to obtain

      different low-frequency  response characteristics  for a  given  driver

      Qts. Various  compromises exist as to low-frequency extension, response

      flatness, box size, and transient response.

 

      There are  a number  of commonly  used alignments,  and  these  can  be

      subdivided into  those that  are flat or non-flat. Flat alignments will

      have a  better transient  performance than the non-flat alignments, and

      can be obtained by using drivers with low values of Qts. Note, however,

      that the "better" transient performance of some alignments results from

      the reduced  output that  is obtained  in the transition band above the

      cutoff frequency.  We will  now proceed  to describe  some of  the more

      popular alignments that have been mentioned in the literature.

 

      There are  three main  flat alignments. The Super Fourth-Order Boom Box

      alignment (SBB4)  is characterized by a large box, low tuning frequency

      and good transient response, albeit with less bass response through the

      transition band  just  above  cutoff.  The  Fourth-Order  Sub-Chebychev

      alignment (SC4) has a degraded transient response compared to the SBB4.

      The Quasi Third-Order Butterworth alignment (QB3) is popular because it

      results in  a smaller box and lower cutoff frequency for a given driver

      Qts. Its  transient response  is not as good as that of the SBB4 or SC4

      alignments.

 

      Corresponding to  the above,  there are  three non-flat alignments. The

      Fourth-Order Chebychev  alignment  (C4)  has  an  equi-ripple  response

      characteristic, and  can be  useful for  low values of ripple less than

      1 dB. The  Fourth-Order Boom  Box alignment  (BB4) has  a peak  in  the

      response near  cutoff, which  can prove  undesirable if  too large. The

      Super Third-Order Quasi-Butterworth alignment (SQB3) is a high value of

      Qts extension of the QB3 alignment.

 

      The following  three sets of tables describe the values of h and a that

      are required  to tune  a vented-box enclosure to a particular alignment

      for a driver of given Qts. Also shown are the ratio of cutoff frequency

      to driver  resonance f3/fs,  and the  peak or  ripple in  the  response

      characteristic. The  values of  h and  a were calculated for an assumed

      leakage loss factor of QL = 7. It should be kept in mind that there are

      many other  possible sets  of values of h and a that yield satisfactory

      low-frequency response  characteristics, particularly  when the effects

      of room  loading are  included. The  tabulated values  should provide a

      good starting point for an alignment to be used in the SVB submodule.

 

 

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有点意思!

elliptic-椭圆形的滤波器.

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软件链接在下面:

http://www.langyin.net/bbs/topic.php?forumid=1146830193&filename=f_31&page=last

包括以下软件:

FINE最新系列

LEAP5/CROSSOVER5

BASSBOX6/XOVER3

SPEAD1.0.4/REVSPEAD1.0.2

SPEAK2.5.112

LSPCAD5.25/6.20等