We locked it at 256 in the standalone basically to have a smooth user experience over a wide range of iOS devices.
The % amount of latency improvement of buffer reduction is not that much midiwise: I personally allways use buffer 256 on desktop, originally because the videorecorder software doesn’t allow me to go lower CPU wise, but lateron I didn’t even care anymore.
The IAA option will vanish during from iOS quickly this year, since apple has deprecated it. We’ll see if we can manage a AUv3 version.
