Twilio has introduced single party call recordings, allowing developers to programmatically record only one side of a call, meeting specific privacy and compliance needs. This feature is particularly useful for call centers to monitor agent performance without capturing the entire conversation. Single party recording can be enabled using a new `recordingTrack` parameter in Programmable Voice APIs, with options to record either inbound or outbound audio tracks. The feature provides flexibility for developers to selectively record specific audio tracks while maintaining privacy and compliance requirements. Additionally, Twilio offers voice recording encryption and PCI-compliant call recordings to further enhance security and meet regulatory standards.