sendAudio

Sends an audio file to a user, group, or channel.

💡 Upload the file to the nandbox media server first and use the returned media_id as the audio value. The file must be .mp3.

Request

method is "sendAudio".

Field	Type	Required	Description
`chat_id`	String	Yes	The target chat or user.
`audio`	String	Yes	The `media_id` returned when you uploaded the audio file.
`app_id`	String	Yes	The app the message belongs to.
`reference`	Long	Yes	Your local id for the message. Echoed back in `messageAck` so you can match them up.
`title`	String	Optional	Track title, shown in the player.
`performer`	String	Optional	Artist or performer, shown in the player.
`caption`	String	Optional	Caption shown with the audio, 0–256 characters.
`to_user_id`	String	Optional	Target a single user inside a group or channel.
`reply_to_message_id`	String	Optional	Set this to send the audio as a reply to an existing message.
`echo`	Integer	Optional	`1` returns a copy of the sent message to you. Default `0`.
`web_page_preview`	Integer	Optional	`1` disable preview · `2` hide the link · `3` instant view · `4` instant view without the link.
`disable_notification`	Boolean	Optional	Deliver silently — the user gets no notification sound.
`menu_ref`	String	Optional	Attach an existing predefined menu, shown inline beneath the message.
`inline_menu`	Array of Menu	Optional	Attach a menu defined inline. Takes priority over `menu_ref` if both are set.
`chat_settings`	Integer	Optional	`1` routes the message to the Bot Manager, used for admin-only communication.

Preconditions

Your API needs the right permission, and the right standing in the chat.

Requirement	Needed for
`"Send Message"` permission	Sending at all.
`"Reply to Message"` permission	Only when using `reply_to_message_id`.
Chat type	Your API must be
---	---
User chat	Already started by the user
Group	A member
Channel	An admin

Response

When	Method	What it tells you
Always	`messageAck`	The server accepted the message. Carries the new `message_id` and echoes your `reference`.
If `echo = 1`	`message`	A full copy of the message as it was sent.
User chats only	`messageDelivered`	The user's device received it.
User chats only	`messageSeen`	The user opened it.

SDKs

SDK	Call	Callback
Java	`api.sendAudio(chatId, audioFileId, reference, caption, appId);`	`onMessagAckCallback(MessageAck msgAck)`
JavaScript	`api.sendAudio(chatId, audioFileId, reference, caption, appId);`	`onMessagAckCallback(msgAck)`
Python	`napi.send_audio(chat_id=chat_id, audio_file_id=audio_file_id, reference=reference, caption=caption, app_id=app_id)`	`on_message_ack_callback(self, msg_ack)`

💡 To set title and performer, build an AudioOutMessage directly and send it with the generic send — the short helpers above do not take them.

Example

Request

json
{
  "method": "sendAudio",
  "chat_id": "90089584764538542",
  "audio": "null9a2270d5964f64981fb1e91dd13e5941262817bdce873cf357c92adbef906b5d.mp4a",
  "title": "Welcome message",
  "performer": "Support Team",
  "reference": 111111135,
  "app_id": "90090684293000559",
  "echo": 1
}

java
String uploadedAudioId = MediaTransfer.uploadFile(TOKEN, filePath);
api.sendAudio(chatId, uploadedAudioId, reference, caption, appId);

javascript
MediaTransfer.uploadFile(TOKEN, filePath, config.UploadServer)
  .then((uploadedAudioId) => {
    api.sendAudio(chatId, uploadedAudioId, reference, caption, appId);
  })
  .catch((e) => console.log("Upload failed", e));

python
napi.send_audio(chat_id=chat_id, audio_file_id=uploaded_audio_id, reference=Utils.get_unique_id(), caption=caption, app_id=app_id)

Response

json
{
  "method": "messageAck",
  "ack": {
    "reference": 111111135,
    "date": 1741967304748,
    "gmid": null,
    "message_id": "d1_TSS4QraN126219"
  }
}

And, because echo was 1:

json
{
  "method": "message",
  "app_id": 90090684293000559,
  "message": {
    "message_id": "d1_TSS4QraN126219",
    "reference": 111111135,
    "date": 1741967304748,
    "type": "audio",
    "audio": {
      "id": "null9a2270d5964f64981fb1e91dd13e5941262817bdce873cf357c92adbef906b5d.mp4a",
      "duration": 42057,
      "size": 733645
    },
    "chat": {
      "id": "90091783822039252",
      "name": "My First API",
      "type": "Bot",
      "terminal": "API"
    },
    "sent_to": {
      "id": "90089584764538542"
    },
    "from": {
      "id": "90091783822039252",
      "name": "My First API",
      "type": "Bot",
      "terminal": "API"
    }
  }
}