Playtime: Hypothetical issue: Retrospective start of clip might conflict with lazy stop of old clip

[helgoboss]

Playtime currently has some tolerance when a clip with quantized start timing is triggered a tiny bit too late ... it will then start immediately at the correct position. However, quantized stop doesn't have this tolerance: If stop is triggered too late, it will schedule the clip for stop at the next quantized position.

This combination can lead to clips being played overlapped when they actually should be played exclusively (exclusive column mode).

Find a good way to deal with this.

[helgoboss]

For now, we completely disable retrospective start. Let's see how this feels in practice.

• Consequence: One needs to trigger quantized clips before the beat is reached, there's no tolerance anymore
• This circumvents the possible issue of overlapping.
• It clearly reveals timing issues related to quantized playing of clips, PDC stuff, transport sync etc.
• It also helps preventing false-positive bug reports of users complaining that first notes or transients are missing