I’m not sure I quite understand what you want speaking of a step sequencer. Why can’t you use MIDI to trigger clips with these sounds within Live? Perhaps using follow actions to play one after the other?
The volume drop in Simpler is due to the volume envelope. How long are the samples that you want to play? Making sure the Sustain setting is at 0.0dB and holding the key the triggers the sample for the duration will ensure there is no volume drop.
Now I tried to put the clips into drum rack and I don´t have anymore that fade-out, which I had before in step sequencer.
I don´t know why hapenned that, also if my ADSR settings for sustain was set on high value (long time).
I wanted just to play my recordings using the Launchpad.
I wanted to use the step seq. as main device to play my sounds like I would play them using the keyboard.
That was my main idea.