чтоб по формулам не видел.

Expression Evaluator

The Expression Evaluator is a versatile tool for manipulating and generating audio data.  Expressions can be entered by clicking on the buttons, using the keyboard, or selecting an expression from the Group and Expression name lists.  For more detailed information, refer to the goldwave.htm file.

For example, say you want to generate a sine wave.  The mathematical equation is:

y = sin(2pft)      where f is the frequency, t is the time and p = 3.14159...

To generate this function in the current sound:

1)      Choose Expression evaluator from the Tools menu
2)      Type in the expression in the large Expression edit box:
           sin(2*pi*f*t)
3)      Enter the desired frequency in the f edit box (500Hz, for example):
           500
4)      Choose the Start button.

Evaluation can be stopped at any time with the Cancel button.  Choosing Cancel a second time closes the Expression Evaluator.

You can also use the expression evaluator to implement new effects.

To create a tremolo effect:

1)      Choose Expression evaluator from the Tools menu
2)      Type in the following expression:
           wave(n)*(0.6+0.4*sin(2*pi*f*t))
3)      Enter the tremolo rate in the "f" edit box (4 per second, for example):
           4
4)      Choose the Start button.

You can alter the depth of tremolo by changing the values 0.6 and 0.4 (to 0.8 and 0.2, for example).

     GOLDWAVE.EXE      GoldWave application file
     GOLDWAVE.HLP      GoldWave help
     GOLDWAVE.HTM      GoldWave manual
     EXPRESS.EQX      Evaluator expressions
     GWPRESET.INI    Effects presets and shapes
     ORDER.DOC      Order form (in MS Word format)
     README.TXT      Important notes/information
     WHATSNEW.TXT      A list of new features