New plugin: PianoRes, for adding damper resonance to sampled pianos

[hannesmenzel]

@jofemodo

It could add “delays” to the faster paths to compensate the delay of slower paths and ensure the final audio mix is perfectly synced

This is usually the case in other hosts. They rather differ about if they introduce an entire buffer (or more) per plugin or if they stuff the added latencies of all plugins in a chain inside a needed number of buffers.