[PD] How's Pd limited?

[i go bananas]

>real-time zero-crossing detection with sample-rate precision.

this is something that is super simple to implement.

it's like:

if (incomingSignal > 0 && previousIncomingSignal < 0 || incomingSignal < 0
|| previousIncomingSignal > 0) return 1;
else return 0;

i also don't understand why such an easy tool has never been put into
vanilla pd.
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