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## Label Studio Enterprise 2.26.0
Time series sync, new Multichannel tag for time series, spectrograms, playground 2.0, annotation result filtering
*Jul 21, 2025*
Helm Chart version: [1.10.0](https://github.com/HumanSignal/charts/blob/master/heartex/label-studio/Chart.yaml)
### New features
#### Time series synchronization with audio and video
You can now use the sync parameter to align audio and video streams with time-series sensor data by mapping each frame to its corresponding timestamp.
For more information, see [Time Series Labeling with Audio and Video Synchronization](/templates/timeseries_audio_video).
#### Group multiple time series in one channel
There is a new [Multichannel tag](/tags/timeseries#MultiChannel) for visualizing time series data. You can use this tag to combine and view multiple time series channels simultaneously on a single channel, with synchronized interactions.
The Multichannel tag significantly improves the usability and correlation of time series data, making it easier for users to analyze and pinpoint relationships across different signals.
#### Spectrogram support for audio analysis
There is a new option to display audio files as spectrograms. You can further specify additional spectrogram settings such as windowing function, color scheme, dBs, mel bands, and more.
Spectrograms can provide a deeper level of audio analysis by visualizing frequency and amplitude over time, which is crucial for identifying subtle sounds (like voices or instruments) that might be missed with traditional waveform views.
#### Playground 2.0
The [Label Studio Playground](https://labelstud.io/playground/) is an interactive sandbox where you can write or paste your XML labeling configuration and instantly preview it on sample tasks—no local install required.
The playground has recently been updated and improved, now supporting a wider range of features, including audio labeling. It is also now [a standalone app](https://labelstud.io/playground-app) and automatically stays in sync with the main application.
!!! info Tip
To modify the data input, use a comment below the `` tags:
#### Filter on annotation results
When applying filters, you will see new options that correspond to annotation results.
These options are identified by the results chip and correspond to control tag names and support complex filtering for multiple annotation results. For example, you can filter by “includes all” or “does not include.”
This enhancement provides a much more direct, predictable, and reliable way to filter and analyze annotation results, saving time and reducing the chances of errors previously encountered with regex matching.
For more information, see [Filter annotation results](manage_data#Filter-annotation-results).
### Enhancements
#### Interactive view all
The **View All** feature when reviewing annotations has been improved so that you can now interact with all annotation elements side-by-side, making it easier to review annotations. For example, you can now play video and audio, move through timelines, and highlight regions.
#### Expanded email notifications
Users can now receive email notifications for various actions, including when they are invited to projects and workspaces, assigned tasks, and when a project is published or completed. You can opt out of notifications from the [Account & Settings page](user_account).
#### Support for JSONL and Parquet
Label Studio now supports more flexible JSON data import from cloud storage. When importing data, you can use JSONL format (where each line is a JSON object), and import Parquet files.
JSONL is the format needed for OpenAI fine-tuning, and the default format from Sagemaker and HuggingFace outputs. Parquet enables smoother data imports and exports for Enterprise-grade systems including Databricks, Snowflake, and AWS feature store,
This change simplifies data import for data scientists, aligns with common data storage practices, reduces manual data preparation steps, and improves efficiency by handling large, compressed data files (Parquet).
!!! note
**Parquet support:** We do not support importing Parquet files that include predictions and/or annotations.
#### Improved grid view configurability
You can now configure the following aspects of the Grid View in the Data Manager:
- **Columns**
- **Fit images to width**
#### Usage & License page visibility
The **Billing & Usage** page has been renamed the **Usage & License** page. Previously this page was only visible to users in the Owner role. A read-only form of this page is now available to all users in the Admin role.
#### Enhanced control and visibility for storage proxies
There are two UI changes related to [storage proxies](storage#Pre-signed-URLs-vs-Storage-proxies):
- On the **Usage & License** page, a new **Enable Storage Proxy** toggle allows organization owners to disable proxying for all projects within the organization. When this setting is disabled, source storages must enable pre-signed URLs. If they are not enabled, the user will be shown an error when they try to add their source storage.
- On the **Source Storage** window, the toggle controlling whether you use pre-signed URLs now clearly indicates that OFF will enable proxying.
#### Enhanced delete actions from the Data Manager
When deleting annotations, reviews, or assignments, you can now select a specific user for the delete action. Previously, you were only able to delete all instances.
With this change, you will have more granular control over data deletion, allowing for precise management of reviews and annotations.
This enhancement is available for the following actions:
- **Delete Annotations**
- **Delete Reviews**
- **Delete Review Assignments**
- **Delete Annotator Assignments**
#### Session timeout configuration
Organization owners can use the new **Session Timeout Policies** fields to control session timeout settings for all users within their organization. These fields are available from the **Usage & License** page.
Owners can configure both the maximum session age (total duration of a session) and the maximum time between activity (inactivity timeout).
#### Miscellaneous UX improvements
- Improved the message text seen when building templates using Ask AI.
- Improved the scrolling action for the workspace list, making it easier for orgs with very large workspace lists.
- Users on the Organization page are now sorted by email by default.
- The **Delete Annotator Assignments** action is now disabled when the tooltip is in automatic task distribution mode.
- The **Data Import** step has been redesigned to better reflect the drag and drop target. The text within the target has also been updated for accuracy and helpfulness.
- The empty states of the labeling interface panels have been improved to provide user guidance and, where applicable, links to the documentation.
### Security
- In the Django admin settings, when **Common login enabled** is deselected, signups and invites are now also restricted.
- Webhooks are restricted to administrators.
- Addressed multiple security vulnerabilities.
### Bug fixes
- Fixed UI issues associated with dark mode.
- Fixed UI issues related to whitelabeled environments.
- Fixed small UI issues related to column sizing and padding.
- Fixed an issue where certain popovers were not appearing when hovering.
- Fixed an issue that would cause the Data Manager to crash when interacting with the project link in the navigation bar.
- Fix various style issues related to error messages in the storage modal.
- Fixed a server error that would return when fetching project counts.
- Fixed an issue where clicking an option on the project role drop-down menu in the Members modal would cause the modal to close unexpectedly.
- Fixed an issue where in some situations users were not able to navigate after deleting a project.
- Fixed an issue where users were still able to resize TimeLineLabels regions even if locked.
- Fixed an issue where the COCO export option was appearing even if the labeling configuration was not compatible
- Fixed an issue where Label All Tasks was not updating for users in the Reviewer role.
- Fixed an issue which caused workspaces list styles to not apply to the full container when scrolled.
- Fixed an issue where exports were included when duplicating a project.
- Fixed an issue with `ls.tasks.get(TASK_ID)` function in SDK.
- Fixed a minor visual issue with the sidebar.
- Fixed an issue with the **Remove Duplicated Tasks** action where it failed when a user selected an odd number of tasks.
- Fixed an issue with CSV exports when the `Repeater` tag is used.
- Fixed an issue where inactive admins would appear in the project members list and could not be removed.
- Fixed an issue with overflow and the date picker.
- Fixed a validation error when updating the labeling configuration of existing tasks through the API.
- Fixed an issue where audio regions would not reflect multiple labels.
- Fixed an issue that was causing incorrect task overlap calculation.
- Fixed an issue where the Plugins editor was not visible at certain zoom levels.
- Fixed an issue with overflow and some drop-down menus.
- Fixed an issue where resolved and unresolved comment filters were not working due to a bug in the project duplication process.
- Fixed an issue where PDF files could not be imported through the Import action.
- Fixed an issue where predictions from Prompts were not always displayed in Quick View.
- Fixed an issue where some non-standard files such as PDFs were not correctly displayed in Quick View if using nginx.
- Fixed an issue where the review stream was opening a blank page when specific labeling configs ere used.
- Fixed a small UI issue related to how project-level roles appear between modals.
- Fixed an issue where the step parameter on the `` tag was not working as expected.
- Fixed an issue where NER entities were misplaced when using Prompts.
- Fixed an issue where the API call for rotating tokens was not setting the expiration correctly on new tokens.
- Fixed an issue where incorrect fonts were being used in the Labeling Interface settings.
- Fixed an issue where filters created in a project that had been duplicated would be shared back to the original project.
- Fixed an issue where information in **Show task source** would extend outside the modal.
- Fixed an issue where annotator limit and evaluation settings were not kept when duplicating projects.
- Fixed an issue where users will now see a warning if they try to configure a custom agreement metric that is incompatible with the current labeling configuration.
- Fixed an issue where users could not see Personal Access Token information after closing the create modal.
- Fixed an issue with tooltip alignment.
- Fixed an issue where nested toggles were not working as expected.
- Fixed an issue where there was overlap after duplicating and then flipping regions.
- Fixed an issue where Prompts would return an error when processing large PDFs.
- Fixed an issue where the agreement score popover did not appear for tasks that included a ground truth annotation.
- Fixed an issue where hovering over a relative timestamp did not display the numerical date.
- Fixed an issue where the hotkey for the Number tag was not working.
- Fixed an issue where the date picker for dashboards was extending beyond the viewport
- Fixed an issue where task agreement was not always calculated in cases where annotators skipped tasks.