Anybody used the Zoom H4n Pro handy recorder as I/O audio interface? I' m running Windows 11 version 21H2, build 22000.856 on a DELL DESKTOP-LE0VDD2 with a 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz 2.42 GHz processor. It works fine with Audacity, Windows Media player, Chrome, Musescore. Pd recognises the H4 and will select is as input & output device, but no audio goes in or out. Any suggestions very welcome Ollie

@drollie USBview is a portable program that will give you info to help with a diagnosis..... https://www.uwe-sieber.de/usbtreeview_e.html#download
I suggest trying the Asio4All driver....... https://www.asio4all.org/
It is a useful asio driver that can collate soundcards into an aggregate device so that they are all easily accessible at the same time..... and it might solve the problem.
Its interface gives information about problems with audio pins that you don't normally have access to.
You can turn inputs and outputs on and off individually, set buffers etc. and resample devices that are running at the wrong sample rate for Pd.
There is a recent update for widows11.
You then connect to Asio4All in the Pd audio settings.
For each audio program that accesses Asio4All the settings can be different (per program settings saved separately and automatically...... opened from the icon that appears in your tray after access by the program.).
David.

Thanks for the good advice. It was actually simpler than that. My brand new Zoom must have been old stock, it just needed a driver update! Sorry for the unnecessary post, and thanks again for your reply Ollie