Looking through the code I see the default is 48, i.e. a latency of 1mS plus that of the ADC and DAC. It seems to work with blocksize = 1 for the lowest latency but I’ve been caught out before with the Linux ALSA library on a Pi4 where FIFO sizes less than 9 sometimes give distortion.
So question is has anybody seen any issues with using blocksize = 1 ? If so what was the minimum safe value ?