class_audioserver.rst 31 KB

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  1. .. Generated automatically by doc/tools/makerst.py in Godot's source tree.
  2. .. DO NOT EDIT THIS FILE, but the AudioServer.xml source instead.
  3. .. The source is found in doc/classes or modules/<name>/doc_classes.
  4. .. _class_AudioServer:
  5. AudioServer
  6. ===========
  7. **Inherits:** :ref:`Object<class_Object>`
  8. **Category:** Core
  9. Brief Description
  10. -----------------
  11. Server interface for low level audio access.
  12. Methods
  13. -------
  14. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  15. | void | :ref:`add_bus<class_AudioServer_method_add_bus>` **(** :ref:`int<class_int>` at_position=-1 **)** |
  16. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  17. | void | :ref:`add_bus_effect<class_AudioServer_method_add_bus_effect>` **(** :ref:`int<class_int>` bus_idx, :ref:`AudioEffect<class_AudioEffect>` effect, :ref:`int<class_int>` at_position=-1 **)** |
  18. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  19. | :ref:`String<class_String>` | :ref:`capture_get_device<class_AudioServer_method_capture_get_device>` **(** **)** |
  20. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  21. | :ref:`Array<class_Array>` | :ref:`capture_get_device_list<class_AudioServer_method_capture_get_device_list>` **(** **)** |
  22. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  23. | void | :ref:`capture_set_device<class_AudioServer_method_capture_set_device>` **(** :ref:`String<class_String>` name **)** |
  24. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  25. | :ref:`AudioBusLayout<class_AudioBusLayout>` | :ref:`generate_bus_layout<class_AudioServer_method_generate_bus_layout>` **(** **)** const |
  26. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  27. | :ref:`int<class_int>` | :ref:`get_bus_channels<class_AudioServer_method_get_bus_channels>` **(** :ref:`int<class_int>` bus_idx **)** const |
  28. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  29. | :ref:`int<class_int>` | :ref:`get_bus_count<class_AudioServer_method_get_bus_count>` **(** **)** const |
  30. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  31. | :ref:`AudioEffect<class_AudioEffect>` | :ref:`get_bus_effect<class_AudioServer_method_get_bus_effect>` **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx **)** |
  32. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  33. | :ref:`int<class_int>` | :ref:`get_bus_effect_count<class_AudioServer_method_get_bus_effect_count>` **(** :ref:`int<class_int>` bus_idx **)** |
  34. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  35. | :ref:`AudioEffectInstance<class_AudioEffectInstance>` | :ref:`get_bus_effect_instance<class_AudioServer_method_get_bus_effect_instance>` **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx, :ref:`int<class_int>` channel=0 **)** |
  36. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  37. | :ref:`int<class_int>` | :ref:`get_bus_index<class_AudioServer_method_get_bus_index>` **(** :ref:`String<class_String>` bus_name **)** const |
  38. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  39. | :ref:`String<class_String>` | :ref:`get_bus_name<class_AudioServer_method_get_bus_name>` **(** :ref:`int<class_int>` bus_idx **)** const |
  40. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  41. | :ref:`float<class_float>` | :ref:`get_bus_peak_volume_left_db<class_AudioServer_method_get_bus_peak_volume_left_db>` **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` channel **)** const |
  42. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  43. | :ref:`float<class_float>` | :ref:`get_bus_peak_volume_right_db<class_AudioServer_method_get_bus_peak_volume_right_db>` **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` channel **)** const |
  44. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  45. | :ref:`String<class_String>` | :ref:`get_bus_send<class_AudioServer_method_get_bus_send>` **(** :ref:`int<class_int>` bus_idx **)** const |
  46. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  47. | :ref:`float<class_float>` | :ref:`get_bus_volume_db<class_AudioServer_method_get_bus_volume_db>` **(** :ref:`int<class_int>` bus_idx **)** const |
  48. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  49. | :ref:`String<class_String>` | :ref:`get_device<class_AudioServer_method_get_device>` **(** **)** |
  50. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  51. | :ref:`Array<class_Array>` | :ref:`get_device_list<class_AudioServer_method_get_device_list>` **(** **)** |
  52. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  53. | :ref:`float<class_float>` | :ref:`get_mix_rate<class_AudioServer_method_get_mix_rate>` **(** **)** const |
  54. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  55. | :ref:`float<class_float>` | :ref:`get_output_latency<class_AudioServer_method_get_output_latency>` **(** **)** const |
  56. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  57. | :ref:`SpeakerMode<enum_AudioServer_SpeakerMode>` | :ref:`get_speaker_mode<class_AudioServer_method_get_speaker_mode>` **(** **)** const |
  58. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  59. | :ref:`float<class_float>` | :ref:`get_time_since_last_mix<class_AudioServer_method_get_time_since_last_mix>` **(** **)** const |
  60. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  61. | :ref:`float<class_float>` | :ref:`get_time_to_next_mix<class_AudioServer_method_get_time_to_next_mix>` **(** **)** const |
  62. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  63. | :ref:`bool<class_bool>` | :ref:`is_bus_bypassing_effects<class_AudioServer_method_is_bus_bypassing_effects>` **(** :ref:`int<class_int>` bus_idx **)** const |
  64. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  65. | :ref:`bool<class_bool>` | :ref:`is_bus_effect_enabled<class_AudioServer_method_is_bus_effect_enabled>` **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx **)** const |
  66. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  67. | :ref:`bool<class_bool>` | :ref:`is_bus_mute<class_AudioServer_method_is_bus_mute>` **(** :ref:`int<class_int>` bus_idx **)** const |
  68. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  69. | :ref:`bool<class_bool>` | :ref:`is_bus_solo<class_AudioServer_method_is_bus_solo>` **(** :ref:`int<class_int>` bus_idx **)** const |
  70. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  71. | void | :ref:`lock<class_AudioServer_method_lock>` **(** **)** |
  72. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  73. | void | :ref:`move_bus<class_AudioServer_method_move_bus>` **(** :ref:`int<class_int>` index, :ref:`int<class_int>` to_index **)** |
  74. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  75. | void | :ref:`remove_bus<class_AudioServer_method_remove_bus>` **(** :ref:`int<class_int>` index **)** |
  76. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  77. | void | :ref:`remove_bus_effect<class_AudioServer_method_remove_bus_effect>` **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx **)** |
  78. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  79. | void | :ref:`set_bus_bypass_effects<class_AudioServer_method_set_bus_bypass_effects>` **(** :ref:`int<class_int>` bus_idx, :ref:`bool<class_bool>` enable **)** |
  80. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  81. | void | :ref:`set_bus_count<class_AudioServer_method_set_bus_count>` **(** :ref:`int<class_int>` amount **)** |
  82. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  83. | void | :ref:`set_bus_effect_enabled<class_AudioServer_method_set_bus_effect_enabled>` **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx, :ref:`bool<class_bool>` enabled **)** |
  84. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  85. | void | :ref:`set_bus_layout<class_AudioServer_method_set_bus_layout>` **(** :ref:`AudioBusLayout<class_AudioBusLayout>` bus_layout **)** |
  86. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  87. | void | :ref:`set_bus_mute<class_AudioServer_method_set_bus_mute>` **(** :ref:`int<class_int>` bus_idx, :ref:`bool<class_bool>` enable **)** |
  88. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  89. | void | :ref:`set_bus_name<class_AudioServer_method_set_bus_name>` **(** :ref:`int<class_int>` bus_idx, :ref:`String<class_String>` name **)** |
  90. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  91. | void | :ref:`set_bus_send<class_AudioServer_method_set_bus_send>` **(** :ref:`int<class_int>` bus_idx, :ref:`String<class_String>` send **)** |
  92. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  93. | void | :ref:`set_bus_solo<class_AudioServer_method_set_bus_solo>` **(** :ref:`int<class_int>` bus_idx, :ref:`bool<class_bool>` enable **)** |
  94. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  95. | void | :ref:`set_bus_volume_db<class_AudioServer_method_set_bus_volume_db>` **(** :ref:`int<class_int>` bus_idx, :ref:`float<class_float>` volume_db **)** |
  96. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  97. | void | :ref:`set_device<class_AudioServer_method_set_device>` **(** :ref:`String<class_String>` device **)** |
  98. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  99. | void | :ref:`swap_bus_effects<class_AudioServer_method_swap_bus_effects>` **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx, :ref:`int<class_int>` by_effect_idx **)** |
  100. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  101. | void | :ref:`unlock<class_AudioServer_method_unlock>` **(** **)** |
  102. +-------------------------------------------------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
  103. Signals
  104. -------
  105. .. _class_AudioServer_signal_bus_layout_changed:
  106. - **bus_layout_changed** **(** **)**
  107. Emitted when the :ref:`AudioBusLayout<class_AudioBusLayout>` changes.
  108. Enumerations
  109. ------------
  110. .. _enum_AudioServer_SpeakerMode:
  111. .. _class_AudioServer_constant_SPEAKER_MODE_STEREO:
  112. .. _class_AudioServer_constant_SPEAKER_SURROUND_31:
  113. .. _class_AudioServer_constant_SPEAKER_SURROUND_51:
  114. .. _class_AudioServer_constant_SPEAKER_SURROUND_71:
  115. enum **SpeakerMode**:
  116. - **SPEAKER_MODE_STEREO** = **0** --- Two or fewer speakers are detected.
  117. - **SPEAKER_SURROUND_31** = **1**
  118. - **SPEAKER_SURROUND_51** = **2** --- A 5.1 channel surround setup detected.
  119. - **SPEAKER_SURROUND_71** = **3** --- A 7.1 channel surround setup detected.
  120. Description
  121. -----------
  122. AudioServer is a low level server interface for audio access. It is in charge of creating sample data (playable audio) as well as its playback via a voice interface.
  123. Tutorials
  124. ---------
  125. - :doc:`../tutorials/audio/audio_buses`
  126. Method Descriptions
  127. -------------------
  128. .. _class_AudioServer_method_add_bus:
  129. - void **add_bus** **(** :ref:`int<class_int>` at_position=-1 **)**
  130. Adds a bus at ``at_position``.
  131. .. _class_AudioServer_method_add_bus_effect:
  132. - void **add_bus_effect** **(** :ref:`int<class_int>` bus_idx, :ref:`AudioEffect<class_AudioEffect>` effect, :ref:`int<class_int>` at_position=-1 **)**
  133. Adds an :ref:`AudioEffect<class_AudioEffect>` effect to the bus ``bus_idx`` at ``at_position``.
  134. .. _class_AudioServer_method_capture_get_device:
  135. - :ref:`String<class_String>` **capture_get_device** **(** **)**
  136. .. _class_AudioServer_method_capture_get_device_list:
  137. - :ref:`Array<class_Array>` **capture_get_device_list** **(** **)**
  138. .. _class_AudioServer_method_capture_set_device:
  139. - void **capture_set_device** **(** :ref:`String<class_String>` name **)**
  140. .. _class_AudioServer_method_generate_bus_layout:
  141. - :ref:`AudioBusLayout<class_AudioBusLayout>` **generate_bus_layout** **(** **)** const
  142. Generates an :ref:`AudioBusLayout<class_AudioBusLayout>` using the available buses and effects.
  143. .. _class_AudioServer_method_get_bus_channels:
  144. - :ref:`int<class_int>` **get_bus_channels** **(** :ref:`int<class_int>` bus_idx **)** const
  145. Returns the amount of channels of the bus at index ``bus_idx``.
  146. .. _class_AudioServer_method_get_bus_count:
  147. - :ref:`int<class_int>` **get_bus_count** **(** **)** const
  148. Returns the number of available buses.
  149. .. _class_AudioServer_method_get_bus_effect:
  150. - :ref:`AudioEffect<class_AudioEffect>` **get_bus_effect** **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx **)**
  151. Returns the :ref:`AudioEffect<class_AudioEffect>` at position ``effect_idx`` in bus ``bus_idx``.
  152. .. _class_AudioServer_method_get_bus_effect_count:
  153. - :ref:`int<class_int>` **get_bus_effect_count** **(** :ref:`int<class_int>` bus_idx **)**
  154. Returns the number of effects on the bus at ``bus_idx``.
  155. .. _class_AudioServer_method_get_bus_effect_instance:
  156. - :ref:`AudioEffectInstance<class_AudioEffectInstance>` **get_bus_effect_instance** **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx, :ref:`int<class_int>` channel=0 **)**
  157. .. _class_AudioServer_method_get_bus_index:
  158. - :ref:`int<class_int>` **get_bus_index** **(** :ref:`String<class_String>` bus_name **)** const
  159. Returns the index of the bus with the name ``bus_name``.
  160. .. _class_AudioServer_method_get_bus_name:
  161. - :ref:`String<class_String>` **get_bus_name** **(** :ref:`int<class_int>` bus_idx **)** const
  162. Returns the name of the bus with the index ``bus_idx``.
  163. .. _class_AudioServer_method_get_bus_peak_volume_left_db:
  164. - :ref:`float<class_float>` **get_bus_peak_volume_left_db** **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` channel **)** const
  165. Returns the peak volume of the left speaker at bus index ``bus_idx`` and channel index ``channel``.
  166. .. _class_AudioServer_method_get_bus_peak_volume_right_db:
  167. - :ref:`float<class_float>` **get_bus_peak_volume_right_db** **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` channel **)** const
  168. Returns the peak volume of the right speaker at bus index ``bus_idx`` and channel index ``channel``.
  169. .. _class_AudioServer_method_get_bus_send:
  170. - :ref:`String<class_String>` **get_bus_send** **(** :ref:`int<class_int>` bus_idx **)** const
  171. Returns the name of the bus that the bus at index ``bus_idx`` sends to.
  172. .. _class_AudioServer_method_get_bus_volume_db:
  173. - :ref:`float<class_float>` **get_bus_volume_db** **(** :ref:`int<class_int>` bus_idx **)** const
  174. Returns the volume of the bus at index ``bus_idx`` in dB.
  175. .. _class_AudioServer_method_get_device:
  176. - :ref:`String<class_String>` **get_device** **(** **)**
  177. .. _class_AudioServer_method_get_device_list:
  178. - :ref:`Array<class_Array>` **get_device_list** **(** **)**
  179. .. _class_AudioServer_method_get_mix_rate:
  180. - :ref:`float<class_float>` **get_mix_rate** **(** **)** const
  181. Returns the sample rate at the output of the audioserver.
  182. .. _class_AudioServer_method_get_output_latency:
  183. - :ref:`float<class_float>` **get_output_latency** **(** **)** const
  184. .. _class_AudioServer_method_get_speaker_mode:
  185. - :ref:`SpeakerMode<enum_AudioServer_SpeakerMode>` **get_speaker_mode** **(** **)** const
  186. Returns the speaker configuration.
  187. .. _class_AudioServer_method_get_time_since_last_mix:
  188. - :ref:`float<class_float>` **get_time_since_last_mix** **(** **)** const
  189. .. _class_AudioServer_method_get_time_to_next_mix:
  190. - :ref:`float<class_float>` **get_time_to_next_mix** **(** **)** const
  191. .. _class_AudioServer_method_is_bus_bypassing_effects:
  192. - :ref:`bool<class_bool>` **is_bus_bypassing_effects** **(** :ref:`int<class_int>` bus_idx **)** const
  193. If ``true``, the bus at index ``bus_idx`` is bypassing effects.
  194. .. _class_AudioServer_method_is_bus_effect_enabled:
  195. - :ref:`bool<class_bool>` **is_bus_effect_enabled** **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx **)** const
  196. If ``true``, the effect at index ``effect_idx`` on the bus at index ``bus_idx`` is enabled.
  197. .. _class_AudioServer_method_is_bus_mute:
  198. - :ref:`bool<class_bool>` **is_bus_mute** **(** :ref:`int<class_int>` bus_idx **)** const
  199. If ``true``, the bus at index ``bus_idx`` is muted.
  200. .. _class_AudioServer_method_is_bus_solo:
  201. - :ref:`bool<class_bool>` **is_bus_solo** **(** :ref:`int<class_int>` bus_idx **)** const
  202. If ``true``, the bus at index ``bus_idx`` is in solo mode.
  203. .. _class_AudioServer_method_lock:
  204. - void **lock** **(** **)**
  205. Locks the audio drivers mainloop. Remember to unlock it afterwards.
  206. .. _class_AudioServer_method_move_bus:
  207. - void **move_bus** **(** :ref:`int<class_int>` index, :ref:`int<class_int>` to_index **)**
  208. Moves the bus from index ``index`` to index ``to_index``.
  209. .. _class_AudioServer_method_remove_bus:
  210. - void **remove_bus** **(** :ref:`int<class_int>` index **)**
  211. Removes the bus at index ``index``.
  212. .. _class_AudioServer_method_remove_bus_effect:
  213. - void **remove_bus_effect** **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx **)**
  214. Removes the effect at index ``effect_idx`` from the bus at index ``bus_idx``.
  215. .. _class_AudioServer_method_set_bus_bypass_effects:
  216. - void **set_bus_bypass_effects** **(** :ref:`int<class_int>` bus_idx, :ref:`bool<class_bool>` enable **)**
  217. If ``true``, the bus at index ``bus_idx`` is bypassing effects.
  218. .. _class_AudioServer_method_set_bus_count:
  219. - void **set_bus_count** **(** :ref:`int<class_int>` amount **)**
  220. Adds and removes buses to make the number of buses match ``amount``.
  221. .. _class_AudioServer_method_set_bus_effect_enabled:
  222. - void **set_bus_effect_enabled** **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx, :ref:`bool<class_bool>` enabled **)**
  223. If ``true``, the effect at index ``effect_idx`` on the bus at index ``bus_idx`` is enabled.
  224. .. _class_AudioServer_method_set_bus_layout:
  225. - void **set_bus_layout** **(** :ref:`AudioBusLayout<class_AudioBusLayout>` bus_layout **)**
  226. Overwrites the currently used :ref:`AudioBusLayout<class_AudioBusLayout>`.
  227. .. _class_AudioServer_method_set_bus_mute:
  228. - void **set_bus_mute** **(** :ref:`int<class_int>` bus_idx, :ref:`bool<class_bool>` enable **)**
  229. If ``true``, the bus at index ``bus_idx`` is muted.
  230. .. _class_AudioServer_method_set_bus_name:
  231. - void **set_bus_name** **(** :ref:`int<class_int>` bus_idx, :ref:`String<class_String>` name **)**
  232. Sets the name of the bus at index ``bus_idx`` to ``name``.
  233. .. _class_AudioServer_method_set_bus_send:
  234. - void **set_bus_send** **(** :ref:`int<class_int>` bus_idx, :ref:`String<class_String>` send **)**
  235. Connects the output of the bus at ``bus_idx`` to the bus named ``send``.
  236. .. _class_AudioServer_method_set_bus_solo:
  237. - void **set_bus_solo** **(** :ref:`int<class_int>` bus_idx, :ref:`bool<class_bool>` enable **)**
  238. If ``true``, the bus at index ``bus_idx`` is in solo mode.
  239. .. _class_AudioServer_method_set_bus_volume_db:
  240. - void **set_bus_volume_db** **(** :ref:`int<class_int>` bus_idx, :ref:`float<class_float>` volume_db **)**
  241. Sets the volume of the bus at index ``bus_idx`` to ``volume_db``.
  242. .. _class_AudioServer_method_set_device:
  243. - void **set_device** **(** :ref:`String<class_String>` device **)**
  244. .. _class_AudioServer_method_swap_bus_effects:
  245. - void **swap_bus_effects** **(** :ref:`int<class_int>` bus_idx, :ref:`int<class_int>` effect_idx, :ref:`int<class_int>` by_effect_idx **)**
  246. Swaps the position of two effects in bus ``bus_idx``.
  247. .. _class_AudioServer_method_unlock:
  248. - void **unlock** **(** **)**
  249. Unlocks the audiodriver's main loop. After locking it always unlock it.