Send voice files
Use this method to send audio files, if you want Telegram clients to display
the file as a playable voice message. For this to work, your audio must be
in an .ogg file encoded with OPUS (other formats may be sent with
sendAudio or sendDocument).
sendVoice(chat_id, voice, duration = NULL, caption = NULL, disable_notification = FALSE, reply_to_message_id = NULL, reply_markup = NULL, parse_mode = NULL)
| chat_id | Unique identifier for the target chat or username of the target channel. | 
| voice | Voice file to send. Pass a file_id as String to send a voice file that exists on the Telegram servers (recommended), pass an HTTP URL as a String for Telegram to get a voice file from the Internet, or upload a local voice file file by passing a file path. | 
| duration | (Optional). Duration of sent audio in seconds. | 
| caption | (Optional). Voice message caption, 0-1024 characters. | 
| disable_notification | (Optional). Sends the message silently. Users will receive a notification with no sound. | 
| reply_to_message_id | (Optional). If the message is a reply, ID of the original message. | 
| reply_markup | (Optional). A Reply Markup parameter object, it can be either: | 
| parse_mode | (Optional). Send 'Markdown' or 'HTML', if you want Telegram apps to show bold, italic, fixed-width text or inline URLs in your bot's message. | 
You can also use it's snake_case equivalent send_voice.
## Not run: 
bot <- Bot(token = bot_token("RTelegramBot"))
chat_id <- user_id("Me")
ogg_url <- "https://upload.wikimedia.org/wikipedia/commons/c/c8/Example.ogg"
bot$sendVoice(
  chat_id = chat_id,
  voice = ogg_url
)
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.