I have a Sony ICD-PX333 recorder which support the track mark functionality. Track mark allows one to place audio labels whilst recording. Once the audio file is connected to the PC, Sony's Sound Organizer application will show where the track marks are. This allows one to easily divide the audio file into multiple segments.
I would like to do the same thing using Audacity, however I cannot find clues of where the track mark may be hidden in the audio file. In fact, I have created a silent audio file and then manually added track marks using the Sound Organizer application. After that I looked at the waveform of my silent audio file and I still could not find any clues.
Here is the link to the empty audio file of duration 30 seconds with track marks at 10s and 20s.
link to mp3