[PD] a smooth crossfade for "equal" signals (freezing/unfreezing)

Hi Pd people, I need help from the masters.

I'm doing a freezing/unfreezing patch, and I'm dealing with cross fading into and out of the freeze state.

I'm actually using an oscilator bank that's being fed by sigmund~, it's actually freezing just perfectly the way I did, that's the easy part, just freeze the oscilators. Now when it unfreezes back, I need a cross fade to avoid clicks. So nothing too fancy. And I've done that alright by using delay~ to hold on a bit to the past and do the crossfade.

So the thing now is how to crossfade from the frozen signal to the slightly delayed frozen copy. This is not actually working that bad, but sometimes it is just not 100%, and you can fell a tiny difference. What to do, huh?

it's something like this

osc~ |
|
| delay~

then line~ obects for cross fading

After I freeze I go to the delayed signal, and cross fade back when I unfreeze

thanks for any help Alex