Audio Attachments

Audio attachments carry the audio content of a voice message.

When an audio attachment is added to the Attachment List storage in the encrypted BLOB, it is encrypted. Depending on the original codec that is used to encode the audio attachment, the encrypted audio attachment carries the file name extension "umrmwav", "umrmwma", or "umrmmp3".

The content of the PidTagVoiceMessageAttachmentOrder property (section in an unprotected voice message contains the list of the file names of the audio attachments. This is true for protected voice messages, except that all of the attachment file names have the ".umrmwav", ".umrmwma", or ".umrmmp3" extension.