2.7.18 expWAV


Contents

Menu Information

File: Export: Sound (WAV)

Brief Information

Export data as Microsoft PCM wave file

Command Line Usage

expWAV fname:="sound.wav";

X-Function Execution Options

Please refer to the page for additional option switches when accessing the x-function from script

Variables

Display
Name 		Variable
Name 		I/O
and
Type 		Default
Value 		Description
Channel Mode mode

Input

int

mono

This variable specifies the channel mode.
Option list

  • mono:Mono
    Mono channel
  • stereo:Stereo
    Stereo channel
Input Worksheet iw

Input

Worksheet

<active>

Specify the input range to be converted to WAV

Left Channel left

Input

int

1

Specify which column of the worksheet is the left channel. And it will represent the Channel when Channel Mode selected as moto.

Right Channel right

Input

int

2

Specify which column of the worksheet is the Right channel. It is only avaliable when Channel Mode selected as Stereo

Start Row r1

Input

int

1

The begin of the data to be exported

End Row r2

Input

int

0

The end of the data to be exported

File Name fname

Input

string

fname$

Specify the path and filename of the output WAV file

Sample Bits bits

Input

int

bit16

Specify the Sample Bits of the output WAV file
Option list

  • 8 Bits
    8 Bits
  • 16 Bits
    16 Bits
  • 32 Bits
    32 Bits

Description

The expWAV function exports worksheet data as Microsoft PCM wave file. It can be accessed from menu or command window

Noted that the value of the Sampling Interval in the worksheet must be larger than 22Hz.

Examples

/*
This script shows how to import a sound wave file and do some processing then export the result. 
The sample data is located in exe_path\Samples\Signal Processing\.
1. Import a wav file to a new book.
2. Perform low-pass filters on the data to remove the high frequency part of the sound.
3. Export the data to a new wav file.
*/
// Import the wav file
fname$ = system.path.program$ + "Samples\Signal Processing\sample.wav";
newbook s:=0;
newsheet col:=1;
impWav options.SparkLines:=0;
string bkn$=%H;
// Remove the high frequency part
fft_filters [bkn$]1!col(1) cutoff:=2000 oy:=(<input>,<new name:="Low Frequency of the Sound">);
// Set the new wav column's format to be short(2) type
wks.col2.format=1;
wks.col2.numerictype=3;

// Export to a new wav file;
fname$="";
expWav iw:=[bkn$]1 left:=2;

Related X-Functions