the files exported by OP–1 field are in 32-bit PCM format. this format is not yet supported by ableton live, so for this reason, they appear in a strange way when imported. converting the audio files to a bit depth that ableton supports, for example 24-bit, will solve the issue. to do so, this free converter can be used. if the tape files need to be edited and converted, this audio editor could be a good option.
additional OP–1 field resources: