DAU File Extension
Express Dictate Dictate Record
- File Type dau
- Developer NCH Software Pty Ltd
- Popularity
- Application Express Dictate
- Category Audio Files
What is a DAU file?
The DAU extension is related to Express Dictate Dictate Record and is classified in the Audio Files category, which contains 667 files.
DAU files are supported by Windows, as well as mobile phones such as Apple iOS. To play a DAU file, you can choose from 2 programs such as Express Dictate and Pocket Dictate.
How to open a DAU file?
If you cannot open a DAU file, it is most often due to missing software. Select a program from the list according to your operating system. Then go to the official website of the program developer, download it, and install it on your device.
Express Dictate and Pocket Dictate stand out as the preferred programs to manage DAU files effectively. To install the current version of Express Dictate, go directly to the official NCH Software website. The universal package for all operating systems is available there.
After successful installation, your operating system should seamlessly handle DAU files via Express Dictate.
Set Express Dictate as the default DAU program
Change Default Program on Mac
- Right click or Control + left click on the desired DAU file;
- Choose "Open in Application" and click "Other";
- Go to the lower section of the window, where you will find the "Enable" menu. By default, it is set to "Recommended Programs";
- Select "All Programs" from this menu and proceed to search for Express Dictate. Check the box next to "Always open in app" to set it as the default option.
Set default programs for Windows
- Start by right-clicking on your DAU file, then select the "Open with" option and choose "Choose another app" from the menu that appears;
- In the pop-up window, select the Express Dictate application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening DAU files.
Convert files to and from DAU
Be aware that converting a DAU file may reduce some features, but you can usually revert it to the original format.
Converting Files to DAU Format
Solve problems with DAU files
DAU files may present some challenges, but most can be easily addressed with minor software tweaks. See the troubleshooting tips below for guidance.
What are the ways to check if my DAU file is damaged?
DAU audio files that have become corrupted may display one or more of the following symptoms:
- The file does not respond or shows errors when opening it;
- The file exhibits poor performance during editing operations in Express Dictate;
- The file stops responding or freezes in Express Dictate or other programs;
- Unexplained DAU file size inflation;
- Actions performed on the file result in the appearance of error notifications;
Why does Express Dictate crash or shut down frequently?
Insufficient updates for NCH Software products can cause Express Dictate to crash. Be sure to regularly install the latest software updates.
Restarting your computer will solve many common problems, which is why it’s the first thing you should do before changing any settings related to the software.
Is there any specific software or utility that can help repair a damaged DAU file?
Use a recovery program to open the damaged DAU file, and in the menu, click "Repair" to start the repair operation. Wait for the recovery process to finish, allowing automatic repair of damaged audio files.
How to edit a DAU file?
To make changes to DAU files, you need specialized software that allows both opening and editing the audio files. Online DAU editors offer fewer capabilities than applications optimized for Express Dictate Dictate Record.
Best DAU Editor Software in 2026
With the mentioned criteria in mind, we have assembled a selection of DAU editors.
| DAU Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Pocket Dictate | NCH Software | Apple iOS | 4.6 out of 5 (41 review) |
| Express Dictate | NCH Software | Windows | 4.5 out of 5 (39 reviews) |