Resolve #3525028 "Speech to speech"

Closes #3525028

modules/ai_api_explorer/src/Plugin/AiApiExplorer/SpeechToSpeechGenerator.php

@@ -143,7 +143,8 @@ final class SpeechToSpeechGenerator extends AiApiExplorerPluginBase {
       $destination = 'temporary://ai-explorers/';
       $this->fileSystem->prepareDirectory($destination, FileSystemInterface::CREATE_DIRECTORY);
       $random = (string) rand();
-      $file_url = $this->fileSystem->saveData($audio_normalized, $destination . '/' . md5($random) . '.mp3');
+      $binary_data = $audio_normalized[0]->getBinary();
+      $file_url = $this->fileSystem->saveData($binary_data, $destination . '/' . md5($random) . '.mp3');
       $file_name = basename($file_url);
       $url = Url::fromRoute('system.temporary', [], ['query' => ['file' => 'ai-explorers/' . $file_name]]);
       $form['right']['response']['#context']['ai_response']['response'] = [