Optional
captionCaption, 0-1024 characters after entities parsing
Optional
caption_List of special entities that appear in the caption, which can be specified instead of parse_mode
Unique identifier for this result, 1-64 bytes
Optional
input_Content of the message to be sent instead of the voice recording
Optional
parse_Mode for parsing entities in the voice message caption. See formatting options for more details.
Optional
reply_Inline keyboard attached to the message
Recording title
Type of the result, must be voice
Optional
voice_Recording duration in seconds
A valid URL for the voice recording
Represents a link to a voice recording in an .OGG container encoded with OPUS. By default, this voice recording will be sent by the user. Alternatively, you can use input_message_content to send a message with the specified content instead of the the voice message.
Note: This will only work in Telegram versions released after 9 April, 2016. Older clients will ignore them.