@whale-av hello, I tried your patch on Mac when I stuck. It seems do not help. I still need to force close the app. I will try it on windows pd tomorrow.

In terms of you said "The audio settings should match the hardware of the computer". I cannot totally agree. The reason is that I have jack audio installed on Mac OS. If I select Jack audio in the setting, then you can change the audio frame size. Also it works fine on my Linux Pd.

Secondly, in the official document, it is clearly said: "You can also specify the audio block size in sample frames. This is 64 by default (except for MMIO for which it's 256), and may be 64, 128, or 256. " in pd document chapter 3. It works on default 64 bytes, and it fails and hangs the software when I increase the block size to 128 or 256 etc. Surely, when I increase the block size, I set it more relaxed rather than "tight". It is officially a bug that needs to be fixed.

I am trying to use Pd to test latency so to be able to fiddling the setting is important for me. Any further advice are very welcome.

pd will hang and has to be force quit on
pd 0.47.1
Especially when I change the sample block size, it will be triggered. I have tested pd on windows 10 and Mac10.11.6 have same problem.