I should add that I have run the ext memory test and it executes without errors. (https://github.com/PaulStoffregen/teensy41_psram_memtest/blob/master/teensy41_psram_memtest.ino)
Thanks for your reply and I am using your effect_delay_ext.cpp ,effect_delay_ext.h, extmem.cpp and extmem.h and my code compiles but no sound out of the delayed channel. Please see below code. It works if I use it as is but if I uncomment...
Have effect_delay_ext.cpp and effect_delay_ext.h been modified for use with 2 PSRAM chips soldered on the Teensy 4.1 board ? Will the Audio Design Tool AUDIO_MEMORY_xxxxx be updated to use those chips as well ?