I have a text file (...\config.txt) containing 2 lines which looks like:

Preamp: -4 dB
Include: surround.txt

I need to change "surround" to "headphones" in that config file. I really need to make 2 batch files. One for "headphones" and one for "surround".

The config file in question is a file related to EqualizerAPO that calls a separate file containing EQ settings for a particular listening environment. In the example above, "surround". However, there can be many others. That config file, when saved, automatically triggers the EQ settings it's calling under the "include" line. The reason I need this is because, if I need to change the listening environment to something else, I need to browse to the directory, open the config.txt file, edit the "Include" section to my needs, then save. It becomes tedious when I have to change it when the need arises. I really need a one-click solution. Any help would be greatly appreciated. Thank you!


The directory (containing that "config.txt" file referred to earlier):

C:\Program Files\EqualizerAPO\config\

contains 2 types of text files: EQ settings files (e.g. headphones, surround, theater, etc. Basically the files that users create and export in TXT format via software called Room EQ Wizard. We'll call them "reference" files.) The other is the actual single config file that EqualizerAPO uses to determine which "reference" file it needs to use and adjust it's EQ settings accordingly. EqualizerAPO attaches itself to the system effect infrastructure as an Audio Processing Object. All I need is a simple solution that would allow me to change the line "Include: surround.txt" to whatever other EQ file I need to use at that time. I am constantly switching between EQs, hence my coming here. If possible, I'd like to be presented with a list of choices.

For example:

Select from the following equalizers:

1. Headphones
2. Surround
3. Theater
4. ***
5. ***

Enter the number:_

And then exit when the number is chosen.

Ideally, it'd be nice to have a very minimal application of some sort running in the taskbar that allows a one-click solution, removing the use of batch files entirely. However, that is not a necessity. Batch files are fine for the time being.

  • I really need to make 2 batch files. One for "headphones" and one for "surround" What do you mean ? A batch file to change surround to headphones and another batch file to change headphones to surround ? And finally, is batch mandatory or Powershell is an available option ? Jan 12, 2014 at 1:49
  • 4
    Why not just make 2 copies of the file config.txt and config-2.txt and just rename them as needed?
    – cybernard
    Jan 12, 2014 at 1:53
  • +1 to cybernard ! This way your batch files will just use rename :) easy ! Jan 12, 2014 at 2:02
  • @user2196728 I've edited the OP for clarification. "A batch file to change surround to headphones and another batch file to change headphones to surround?" That's correct. Regarding Powershell, I've only used it once or twice before, but I don't see an issue with
    – Steve
    Jan 12, 2014 at 4:27
  • Regarding cybernard suggestion - it requires at least 2 RENAMEs per change. I suggest using a single COPY instead. So you could have headphones.txt and surround.txt, and simply copy either one to config.txt as needed.
    – dbenham
    Jan 12, 2014 at 15:26

2 Answers 2


See if this helps. I had this from when I needed to perform a search and replace on an XML file. The strings, as long as you enclose them in double-quotes, can have special characters such as greater than and less than (used as redirection by scripts, ignored here). If you don't like the usage of variables to define the files you want to modify, you could make them into arguments which you could pass to the script. But then you would have to change the logic to shift the parameters unless you explicitly say "parameter 1 is the file to be changed, parameter 2 is the string to be found, etc..."

Hope this helps someone. Windows XP or higher is required.

::Find and Replace script allows the user to 
::define a file path, file name and a string 
::to find and replace so as to create a new file.
::Original file is backed up with an added extension of *.bak, in case
::the user finds the need to go back to the original.

@echo off
::Use the path from whence the script was executed as
::the Current Working Directory
set CWD=%~dp0

::The variables below should be modified to the
::files to be changed and the strings to find/replace
::Include trailing backslash in _FilePath
set _FilePath=Path\To\File\
set _FileName=FileNameToModify
::_WrkFile is the file on which the script will make
set _WrkFile=BackupFileName
set OldStr="The string to be found and replaced, enclosed in double-quotes"
set NewStr="The new string to replace the value of OldStr, enclosed in double-quotes"

::Set a variable which is used by the
::search and replace section to let us
::know if the string to be modified was
::found or not.
set _Found=Not found


if not exist "%_FilePath%%_FileName%" goto :NotFound

::If a backup file exists, delete it
if exist "%_FilePath%%_WrkFile%" (
    echo Deleting "%_FilePath%%_WrkFile%" 
    del "%_FilePath%%_WrkFile%" >nul 2>&1

echo Backing up "%_FilePath%%_FileName%"...
copy "%_FilePath%%_FileName%" "%_FilePath%%_WrkFile%" /v

::Delete the original file. No worries, we got a backup.
if exist "%_FilePath%%_FileName%" del "%_FilePath%%_FileName%"
echo Searching for %OldStr% string...
for /f "usebackq tokens=*" %%a in ("%_FilePath%%_WrkFile%") do (
    set _LineChk=%%a
    if "!_LineChk!"==%OldStr% (
        SET _Found=Found 
        SET NewStr=!NewStr:^"=! 
        echo !NewStr!
        ) else (echo %%a)
        )>>"%_FilePath%%_FileName%" 2>&1

::If we didn't find the string, rename the backup file to the original file name
::Otherwise, delete the _WorkFile as we re-created the original file when the
::string was found and replaced.
if /i "!_Found!"=="Not found" (echo !_Found! && del "%_FilePath%%_FileName%" && ren "%_FilePath%%_WrkFile%" %_FileName%) else (echo !_Found! && del "%_FilePath%%_WrkFile%")
goto :exit

echo File "%_FilePath%%_FileName%" missing. 
echo Cannot continue...
:: Pause script for approx. 10 seconds...
PING -n 11 > NUL 2>&1
goto :Exit

exit /b

This should do the trick:

$filepath = "C:\Program Files\EqualizerAPO\config\config.txt";
$equalizer = "";
$equalizers = @("Headphones","Surround","Theater");  # Add all options here.

if( -not (test-path $filepath)) 
    Write-Host "File: `"$filepath`" not found";

if($args.count -gt 0)
    if($args[0] -ge 0 -and $args[0] -lt $equalizers.length)
        $equalizer = $equalizers[[int]$args[0]];
    elseif($equalizers -contains $args[0])
        $equalizer = $args[0];
        Write-Host "Invalid argument";
    Write-Host "Select from the following equalizers:";


    foreach( $option in $equalizers)
        Write-Host "$i. $option";
    $choice = Read-Host "Enter choice:";

    if($choice -ge 0 -and $choice -lt $equalizers.length)
        $equalizer = $equalizers[[int]$choice];
        Write-Host "Invalid choice";

Write-Host "Changing config file to use $equalizer";

(Get-Content $filepath) | %{

    $_ -replace '^Include: .*$', ("Include: $equalizer.txt")

} | Set-Content $filepath


Save as filename.ps1 and create a bat file named filename.cmd and place them both somewhere in your PATH, that way you can run the script by typing "filename" in either windows start menu or run.

paste the following in the bat file:

@echo off
if [%1]==[] goto none
powershell "& '%~dp0\filename.ps1' '%1'"
goto end
powershell "& '%~dp0\filename.ps1'"

PS: if you havent before be sure to enable running of powershell scripts:

powershell "set-executionpolicy remotesigned"
  • You should state at the beginning of your question that the code that follows is not a batch file. apart from 7 lines at the end
    – barlop
    Nov 5, 2015 at 12:59

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