Hi David,
After conducting research on YouTube and tutorials, I've identified three methods to accomplish this.
-The first method, which I often use, involves selecting all the tracks and quantizing everything to 16th notes. Then, I correct any artifacts directly by double-clicking on the transient in the track area.
-The second method is outlined in these links. One is recommended by Apple, and the other is from this guy:
https://support.apple.com/en-us/102087#:~:text=If you want to quantize,then apply your timing adjustments.
-The third option involves people using quantization in a manner similar to Beat Detective in Pro Tools:
this guy as well
So...
Now, I have a multitrack session. Regardless of whether I use slicing, rhythmic, or polyphonic modes, the sound of the drums worsens. For instance, the kick loses its attack, almost like there's a phase problem.
I've experimented with all the available options, but the issue persists.
I'm attaching two audio files here, one with Flex and one without.
If you listen closely, you can hear how the kick drum loses punch
no flex.mp3
with flex slice.mp3