Robert Tausk
You are making great progress as evidenced by the fact that you are now molding basic information into your own style and creating as you go.
You may be beyond the following, but I will post it for your consideration for if and when ever needed.
When you are trying to achieve fast or slow motion effects with Time Stretch, you can gain some limited success by selecting Maintain Audio Pitch in the Time Stretch dialog where you are setting the Speed %. You might be interested in how to minimize degraded or distorted audio when applying fast motion effect as described in the following
Many thanks for the update. Keep up the great work.
Best wishes
ATR