ctors.go
func (api *TelegramBotAPI) NewOutgoingAudio(recipient Recipient, fileName string, reader io.Reader) *OutgoingAudio {
	return &OutgoingAudio{
		outgoingMessageBase: outgoingMessageBase{
			outgoingBase: outgoingBase{
				api:       api,
				Recipient: recipient,
			},
		},
		outgoingFileBase: outgoingFileBase{
			fileName: fileName,
			r:        reader,
		},
	}
}
func (api *TelegramBotAPI) NewOutgoingAudio(recipient Recipient, fileName string, reader io.Reader) *OutgoingAudio {
	return &OutgoingAudio{
		outgoingMessageBase: outgoingMessageBase{
			outgoingBase: outgoingBase{
				api:       api,
				Recipient: recipient,
			},
		},
		outgoingFileBase: outgoingFileBase{
			fileName: fileName,
			r:        reader,
		},
	}
}
// NewOutgoingAudio creates a new outgoing audio file.