The controller is obliged to deliver a copy of the personal data being processed to the data subject. According to the current policy of the Office of the Data Protection Ombudsman, the data does not always have to be delivered in its original format if it can be delivered in another appropriate form. It is the controller's duty to assess which format is appropriate in any given case.
Depending on the circumstances, copies of recorded calls can be delivered in writing, e.g as a transcript, or electronically, e.g. as a recording. The transcript must be an accurate reflection of the content on the recording.
In addition, the controller can also offer the data subject the opportunity to listen to the recording, for example at the controller's office. However, the opportunity to listen to the recording may not be the only way by which the right to access the recorded call is realised.