*/
int radio_get_channel_spacing(radio_h radio, int *channel_spacing);
+/**
+ * @brief Sets the radio volume.
+ * @since_tizen 3.0
+ * @param[in] radio The handle to radio
+ * @param[in] volume The volume to set [0.0 ~ 1.0](1.0 = 100%)
+ * @return @c 0 on success,
+ * otherwise a negative error value
+ * @retval #RADIO_ERROR_NONE Successful
+ * @retval #RADIO_ERROR_INVALID_PARAMETER Invalid parameter
+ * @retval #RADIO_ERROR_INVALID_OPERATION Invalid operation
+ * @retval #RADIO_ERROR_NOT_SUPPORTED Not supported
+ * @see radio_get_volume()
+ */
+int radio_set_volume(radio_h radio, float volume);
+
+/**
+ * @brief Gets the current volume of the radio.
+ * @since_tizen 3.0
+ * @param[in] radio The handle to radio
+ * @param[out] volume The current volume [0.0 ~ 1.0](1.0 = 100%)
+ * @return @c 0 on success,
+ * otherwise a negative error value
+ * @retval #RADIO_ERROR_NONE Successful
+ * @retval #RADIO_ERROR_INVALID_PARAMETER Invalid parameter
+ * @retval #RADIO_ERROR_INVALID_OPERATION Invalid operation
+ * @retval #RADIO_ERROR_NOT_SUPPORTED Not supported
+ * @see radio_set_volume()
+ */
+int radio_get_volume(radio_h radio, float *volume);
/**
* @}