Labeling Sound Classification Data

After a project is created, you will be redirected to the new-version ExeML and the project starts to run. When the data labeling phase changes to Awaiting operation, manually confirm data labeling in the dataset. You can also add or delete data in the dataset and modify labels.

Figure 1 Data labeling status

Labeling Sound Files

On the labeling phase of the new-version ExeML, click Instance Details. The data labeling page is displayed. Click an image to go to the labeling page.
On the labeling page, click the Unlabeled tab. All unlabeled sound files are displayed. Select the sound files to be labeled in sequence, or tick Select Current Page to select all sound files on the page, and then add labels to the sound files in the right pane.
Figure 2 Labeling a sound file
Add a label. Play a sound file, and select the sound file. In the Label area, enter a label name or select an existing label from the drop-down list on the right, and select a shortcut from the drop-down list on the left. Click OK. The selected sound file is labeled.
After all the sound files are labeled, view them on the Labeled tab page or view the list of All Labels in the right pane to learn the name and quantity of the labels.

Synchronizing or Adding Sound Files

On the data labeling phase, click Instance Details. The labeling page is displayed. When creating a sound classification project, you can select local data or synchronize data in OBS as the training data.

Add Audio: You can quickly add sound files on a local PC to ModelArts and synchronize the files to the OBS path specified during project creation. Click Add data to import data.

Only 16-bit WAV files are supported. The size of a sound file cannot exceed 4 MB. The total size of all sound files uploaded in one attempt cannot exceed 8 MB.
Synchronize Data Source: To quickly obtain the latest sound files in the OBS bucket, click Synchronize Data Source to add sound files in OBS to ModelArts.
Delete Audio: You can delete sound files one by one, or tick Select Current Page to delete all sound files on the page.

The deleted sound files cannot be recovered. Exercise caution when performing this operation.

Modifying Labeled Data

After labeling data, you can modify the labeled data on the Labeled tab page.

Modifying based on audio
On the dataset details page, click the Labeled tab. Select one or more audio files to be modified from the audio list. Modify the label in the label details area on the right.
- Modifying a label: In the File Labels area, click the editing icon in the Operation column, enter the correct label name in the text box, and click the check mark icon.
- Deleting a label: In the File Labels area, click the deletion icon in the Operation column. In the displayed dialog box, click OK.

Modifying based on labels
On the data labeling page, click Label Management on the right. You will see information about all labels.
- Modifying a label: Click the edit button in the Operation column. In the displayed dialog box, enter the new label name, select the new shortcut, and click OK. After the modification, the new label applies to the audio files that contain the original label.
- Deleting a label: Click the delete button in the Operation column. In the displayed dialog box, confirm the operation and click OK.
  
  Deleted tags cannot be restored.

Resuming Workflow Execution

After confirming data labeling, return back to the new-version ExeML. Click Next. Then, the workflow continues to run in sequence until all phases are executed.

Figure 3 Resuming the workflow execution