diff --git a/src/main/kotlin/com/epam/brn/dto/AudioFileMetaData.kt b/src/main/kotlin/com/epam/brn/dto/AudioFileMetaData.kt
index a139d8e80..34b51687d 100644
--- a/src/main/kotlin/com/epam/brn/dto/AudioFileMetaData.kt
+++ b/src/main/kotlin/com/epam/brn/dto/AudioFileMetaData.kt
@@ -22,4 +22,14 @@ data class AudioFileMetaData(
         this.speedCode = AzureRates.X_SLOW
         this.speedFloat = "0.65"
     }
+
+    fun setSpeedNormal() {
+        this.speedCode = AzureRates.DEFAULT
+        this.speedFloat = "1"
+    }
+
+    fun setSpeedFaster() {
+        this.speedCode = AzureRates.FAST
+        this.speedFloat = "1.2"
+    }
 }
diff --git a/src/main/kotlin/com/epam/brn/service/YandexSpeechKitService.kt b/src/main/kotlin/com/epam/brn/service/YandexSpeechKitService.kt
index 101298076..ef074c941 100644
--- a/src/main/kotlin/com/epam/brn/service/YandexSpeechKitService.kt
+++ b/src/main/kotlin/com/epam/brn/service/YandexSpeechKitService.kt
@@ -43,8 +43,8 @@ class YandexSpeechKitService(
     @Value("\${yandex.format}")
     lateinit var format: String
 
-    @Value("\${yandex.emotion}")
-    lateinit var emotion: String
+    @Value("\${yandex.emotions}")
+    lateinit var emotions: List<String>
 
     var iamToken: String = ""
     var iamTokenExpiresTime: LocalDateTime = LocalDateTime.now(ZoneOffset.UTC)
@@ -78,6 +78,7 @@ class YandexSpeechKitService(
      */
     fun generateAudioStream(audioFileMetaData: AudioFileMetaData): InputStream {
         val token = getYandexIamTokenForAudioGeneration()
+        val emotion = emotions.random()
         val parameters = ArrayList<NameValuePair>().apply {
             add(BasicNameValuePair("folderId", folderId))
             add(BasicNameValuePair("lang", audioFileMetaData.locale))
diff --git a/src/main/kotlin/com/epam/brn/service/impl/UserAnalyticsServiceImpl.kt b/src/main/kotlin/com/epam/brn/service/impl/UserAnalyticsServiceImpl.kt
index 1f7b3ae2b..919e691e3 100644
--- a/src/main/kotlin/com/epam/brn/service/impl/UserAnalyticsServiceImpl.kt
+++ b/src/main/kotlin/com/epam/brn/service/impl/UserAnalyticsServiceImpl.kt
@@ -66,32 +66,34 @@ class UserAnalyticsServiceImpl(
     }
 
     override fun prepareAudioStreamForUser(exerciseId: Long, audioFileMetaData: AudioFileMetaData): InputStream =
-        textToSpeechService.generateAudioOggStreamWithValidation(prepareAudioFileMetaData(exerciseId, audioFileMetaData))
+        textToSpeechService
+            .generateAudioOggStreamWithValidation(
+                prepareAudioFileMetaData(exerciseId, audioFileMetaData)
+            )
 
     override fun prepareAudioFileMetaData(exerciseId: Long, audioFileMetaData: AudioFileMetaData): AudioFileMetaData {
         val currentUserId = userAccountService.getCurrentUserId()
         val lastExerciseHistory = studyHistoryRepository
             .findLastByUserAccountIdAndExerciseId(currentUserId, exerciseId)
         val seriesType = ExerciseType.valueOf(exerciseRepository.findTypeByExerciseId(exerciseId))
-
         val text = audioFileMetaData.text
         if (!listTextExercises.contains(seriesType))
             audioFileMetaData.text = text.replace(" ", ", ")
-
-        if (text.contains(" ")) {
-            if (isDoneBad(lastExerciseHistory))
-                audioFileMetaData.setSpeedSlowest()
-            else
-                audioFileMetaData.setSpeedSlow()
-        } else if (isDoneBad(lastExerciseHistory)) {
+        if (lastExerciseHistory == null)
+            audioFileMetaData.setSpeedNormal()
+        else if (isDoneBad(lastExerciseHistory))
             audioFileMetaData.setSpeedSlow()
-        }
+        else if (isDoneWell(lastExerciseHistory))
+            audioFileMetaData.setSpeedFaster()
         return audioFileMetaData
     }
 
     fun isDoneBad(lastHistory: StudyHistory?): Boolean =
         lastHistory != null && !exerciseService.isDoneWell(lastHistory)
 
+    fun isDoneWell(lastHistory: StudyHistory?): Boolean =
+        lastHistory != null && exerciseService.isDoneWell(lastHistory)
+
     fun isMultiWords(seriesType: ExerciseType): Boolean =
         seriesType == ExerciseType.PHRASES || seriesType == ExerciseType.SENTENCE || seriesType == ExerciseType.WORDS_SEQUENCES
 
diff --git a/src/main/resources/application.properties b/src/main/resources/application.properties
index 1d311d189..804cc5707 100644
--- a/src/main/resources/application.properties
+++ b/src/main/resources/application.properties
@@ -63,8 +63,7 @@ yandex.generationAudioLink=https://tts.api.cloud.yandex.net/speech/v1/tts:synthe
 yandex.folderId=${YANDEX_FOLDER_ID:b1g0m877l9r22ngujisu}
 yandex.format=oggopus
 #yandex.emotion=good
-yandex.emotion=neutral
-yandex.speeds=0.8,1,1.2
+yandex.emotions=neutral,good
 yandex.folderForFiles=frontend/public
 
 brn.picture.file.default.path=pictures/%s.jpg
diff --git a/src/test/kotlin/com/epam/brn/service/UserAnalyticsServiceTest.kt b/src/test/kotlin/com/epam/brn/service/UserAnalyticsServiceTest.kt
index 92d593fbe..ccaec2986 100644
--- a/src/test/kotlin/com/epam/brn/service/UserAnalyticsServiceTest.kt
+++ b/src/test/kotlin/com/epam/brn/service/UserAnalyticsServiceTest.kt
@@ -131,8 +131,8 @@ internal class UserAnalyticsServiceTest {
         val metaDataResult = userAnalyticsService.prepareAudioFileMetaData(exerciseId, audioFileMetaData)
 
         // THEN
-        metaDataResult.speedFloat shouldBe "0.8"
-        metaDataResult.speedCode shouldBe AzureRates.SLOW
+        metaDataResult.speedFloat shouldBe "1.2"
+        metaDataResult.speedCode shouldBe AzureRates.FAST
         metaDataResult.text shouldBe "мама, папа"
     }
 
@@ -152,8 +152,8 @@ internal class UserAnalyticsServiceTest {
         val metaDataResult = userAnalyticsService.prepareAudioFileMetaData(exerciseId, audioFileMetaData)
 
         // THEN
-        metaDataResult.speedFloat shouldBe "0.8"
-        metaDataResult.speedCode shouldBe AzureRates.SLOW
+        metaDataResult.speedFloat shouldBe "1.2"
+        metaDataResult.speedCode shouldBe AzureRates.FAST
         metaDataResult.text shouldBe "мама папа"
     }
 
@@ -174,8 +174,8 @@ internal class UserAnalyticsServiceTest {
         val metaDataResult = userAnalyticsService.prepareAudioFileMetaData(exerciseId, audioFileMetaData)
 
         // THEN
-        metaDataResult.speedFloat shouldBe "0.65"
-        metaDataResult.speedCode shouldBe AzureRates.X_SLOW
+        metaDataResult.speedFloat shouldBe "0.8"
+        metaDataResult.speedCode shouldBe AzureRates.SLOW
         metaDataResult.text shouldBe "мама, папа"
     }
 
@@ -196,8 +196,8 @@ internal class UserAnalyticsServiceTest {
         val metaDataResult = userAnalyticsService.prepareAudioFileMetaData(exerciseId, audioFileMetaData)
 
         // THEN
-        metaDataResult.speedFloat shouldBe "0.65"
-        metaDataResult.speedCode shouldBe AzureRates.X_SLOW
+        metaDataResult.speedFloat shouldBe "0.8"
+        metaDataResult.speedCode shouldBe AzureRates.SLOW
         metaDataResult.text shouldBe "мама папа"
     }
 
@@ -217,8 +217,8 @@ internal class UserAnalyticsServiceTest {
         val metaDataResult = userAnalyticsService.prepareAudioFileMetaData(exerciseId, audioFileMetaData)
 
         // THEN
-        metaDataResult.speedFloat shouldBe "1"
-        metaDataResult.speedCode shouldBe AzureRates.DEFAULT
+        metaDataResult.speedFloat shouldBe "1.2"
+        metaDataResult.speedCode shouldBe AzureRates.FAST
         metaDataResult.text shouldBe "мама"
     }
 
@@ -242,6 +242,22 @@ internal class UserAnalyticsServiceTest {
         metaDataResult.speedCode shouldBe AzureRates.SLOW
     }
 
+    @Test
+    fun `should prepareAudioFileMetaData normal speed for single word`() {
+        // GIVEN
+        every { userAccountService.getCurrentUserId() } returns currentUserId
+        every {
+            studyHistoryRepository.findLastByUserAccountIdAndExerciseId(currentUserId, exerciseId)
+        } returns null
+        every { exerciseRepository.findTypeByExerciseId(exerciseId) } returns ExerciseType.SINGLE_SIMPLE_WORDS.name
+        val audioFileMetaData = AudioFileMetaData("text", BrnLocale.RU.locale, Voice.FILIPP.name, "1", AzureRates.DEFAULT)
+        // WHEN
+        val metaDataResult = userAnalyticsService.prepareAudioFileMetaData(exerciseId, audioFileMetaData)
+        // THEN
+        metaDataResult.speedFloat shouldBe "1"
+        metaDataResult.speedCode shouldBe AzureRates.DEFAULT
+    }
+
     @Test
     fun `should prepareAudioStreamForUser`() {
         // GIVEN
diff --git a/src/test/resources/application.properties b/src/test/resources/application.properties
index 9c35a137b..caa1209cc 100644
--- a/src/test/resources/application.properties
+++ b/src/test/resources/application.properties
@@ -49,7 +49,6 @@ yandex.generationAudioLink=https://tts.api.cloud.yandex.net/speech/v1/tts:synthe
 yandex.folderId=b1gqn2760f5ongt82lm3
 yandex.format=oggopus
 yandex.emotion=good
-yandex.speeds=1,1.2
 yandex.folderForFiles=audioTest
 
 brn.resources.default-pictures.path=pictures/