SDII File Extension
Sound Designer 2 Audio Format
- File Type sdii
- Developer Avid Technology
- Popularity
- Application Pro Tools
- Category Audio Files
- Format Binary
What is a SDII file?
The SDII extension is related to Sound Designer 2 Audio Format and is classified in the Audio Files category, which contains 667 files.
The Sound Designer 2 Audio Format (SDII) was developed by Avid Technology, which created file format and 8 programs to work with them.
SDII files are supported by Windows and Mac OS. To play a SDII file, you can choose from 3 programs such as Pro Tools, QuickTime Player and Apple Logic Pro.
Programs that support SDII files
Windows
How to open a SDII file?
If you cannot open a SDII 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.
Pro Tools, QuickTime Player and Apple Logic Pro stand out as the preferred programs to manage SDII files effectively. To install the current version of Pro Tools, go directly to the official Avid Technology website. The universal package for all operating systems is available there.
After successful installation, your operating system should seamlessly handle SDII files via Pro Tools.
Set Pro Tools as the default SDII program
Change Default Program on Mac
- Right click or Control + left click on the desired SDII 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 Pro Tools. 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 SDII file, then select the "Open with" option and choose "Choose another app" from the menu that appears;
- In the pop-up window, select the Pro Tools application;
- Check the "Always use this application" checkbox, and then click "OK" to apply the selected application as the default for opening SDII files.
Convert files to and from SDII
For difficult SDII files, try converting them to formats like WAV or similar formats to improve usability.
Be aware that converting a SDII file may reduce some features, but you can usually revert it to the original format.
Convert SDII to other file formats
Solve problems with SDII files
SDII 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 SDII file is damaged?
SDII 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 Pro Tools;
- The file stops responding or freezes in Pro Tools or other programs;
- Unexplained SDII file size inflation;
- Actions performed on the file result in the appearance of error notifications;
Why does Pro Tools crash or shut down frequently?
Insufficient updates for Avid Technology products can cause Pro Tools 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 SDII file?
Use a recovery program to open the damaged SDII 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 SDII file?
To make changes to SDII files, you need specialized software that allows both opening and editing the audio files. Online SDII editors offer fewer capabilities than applications optimized for Sound Designer 2 Audio Format.
Best SDII Editor Software in 2026
With the mentioned criteria in mind, we have assembled a selection of SDII editors.
| SDII Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| Apple Logic Pro | Apple | Mac OS | 4.7 out of 5 (37 reviews) |
| Pro Tools | Avid Technology | Windows | 4.7 out of 5 (37 reviews) |