I am running into what appears to be a MIDI buffer overload in Cubase12. I'm setting up a template with microtonal keyboards (Microzone, Lumatone) which render pitch bend microtuning of each played pitch on a separate MIDI channel (i.e. 8 MIDI channels = 8 notes polyphony). I've noticed that with VSTs and DAWs there doesn't appear to be a way to increase the size of a MIDI buffer (only audio buffers).
Question: If each multitimbral patch uses 1 channel of 14 bit pitch bend rendered microtuning per played note, how may (8 channel) multitimbral patches can be used before the transmission limit of the MIDI protocol is reached? I see that maximum MIDI transmission is 3125 bytes per second but I'm not sure how to translate that into the limit in terms of the maximum number of pitch bend rendered note/channels per cable.
If I'm not reaching a hard transmission limit, does anyone know of any way to increase the standard MIDI buffer size implemented in DAWs?