I have a Presonus Studio Live 16.4.2 Mixer connected with fire wire to an older Mac Pro (OSX 10.11). On this runs Capture 2. And Ultimate Control as driver. The recording of audio signals on the individual tracks (1-16) works wonderfully, also the playback of Capture 2 back via the mixer. However, if I export the recorded tracks (as WAV) from Capture 2 to be able to edit them afterwards in my DAW, I will only get empty audio files. No signal. What's going wrong? Who can help? 1000 thanks in advance.