Configuring Sound for Remote Desktop Server

To change program settings, select Preferences in the tray menu.

General settings

Disable Audio Sandbox for Chromium-based browsers and apps

This option is required for compatibility with such browsers as Google Chrome, Microsoft Edge and some Electron-based applications (e.g. Microsoft Teams, Zoom, etc.).

Audio device isolation mode

This setting allows you to adjust the isolation behavior for audio devices, providing different levels of isolation, compatibility, and functionality depending on your environment. Administrative rights are required to change the isolation mode.

This setting is shared across multiple FabulaTech products, including:
- USB for Remote Desktop
- Sound for Remote Desktop
- Webcam for Remote Desktop

By default, FabulaTech virtual audio devices redirected by Sound for Remote Desktop are isolated on a per-session basis (Strict isolation mode). This behavior affects the Windows native audio subsystem and effectively disables native Remote Desktop audio redirection.

Strict
Provides the highest level of isolation. FabulaTech audio devices are fully isolated and accessible only by the user who owns them. This ensures complete audio separation and prevents cross-session access.
- Guarantees maximum isolation
- Prevents cross-session interaction
- Important: Native Remote Desktop audio redirection is not supported in this mode
- Recommended for multi-user environments requiring strict separation

Session-isolated (compatible)
Provides session-based isolation with a compatibility layer. In most cases, audio devices remain isolated per session.
- Enables coexistence of FabulaTech and native Remote Desktop audio redirection
- Maintains isolation in most scenarios
- Recommended when native audio redirection must be used alongside FabulaTech

No isolation
Disables session isolation entirely. Audio devices are shared across all logged-on users.
- Recommended only for single-user environments
- If several users are logged in, all users can access the same audio devices
- May lead to conflicts in multi-user environments

Compression settings

The next two tabs contain similar compression settings for playback and recording.

You can select either lossless PCM compression for the best quality (if you are not limited in bandwidth) or Opus compression for optimal performance on slow networks. Different compression options are available for these encoders.

Cache size

Increasing this value will eliminate choppy sound on unstable networks, but has a direct impact on sound delay.

Allow cache size increase for better quality

If this feature is enabled, the buffer size may be increased automatically, when it is insufficient for continuous audio playback. This may result in increased delay.

Optimize for

Choose the proper optimization algorithm according to your audio content.

Bitrate

A higher value means better quality but higher bandwidth usage.

Frame length

The default 20 ms frames are a good choice for most applications.