I downloaded a uTube film ( gymnastic exercises with added background music ) and i added comments successfully with Voice Over . I did that in several times. But suddenly the purple track appears as before but the stay muted whatever Audio Adjustment i try I can hear them , see their purple track and manipulate the VoiceOver tracks

Hi Rounik, Please excuse me reacting so late. I am nevertheless very thankful to You. Before i found your answer I restarted dictating from scratch in new projects and I finally succeeded in putting 121 voiceovers in 3 projects (3 parts of a future dvd). Thus proving myself - if not the others - that I am not yet completely senile. To answer Your 3 questions: You did indeed understand me 100% : - The waveforms where visible everywhere. - After some time the purple NEW voice-over track was NOT playing back ANYMORE wherever i started dictating in the timeline (before - among or after the other-ok-purple tracks) ; - And YES there is an OTHER audio track (a sky-blue one with the music from the downloaded video) which can have been at the origin of the (muted) new tracks in the old project. My problem with added voice-over started in my project I presume by merrily forgetting to control ALL the different ducking possibilities when i decided : 1° to ad a Still Picture just at the beginning of the project 2° to detach a piece of audio so as the music now can start under the first Still. By doing this the selected sky-blue piece of track becomes purple and the ducking influences must be