Apple iPad Pro 12.9-inch, 3rd gen, WiFi, 1 TB, Model MTFR2FD/A
The project is a mix of MIDI and audio tracks, in total 55 tracks.
Audio tracks <= track position 44 are played. Audio tracks >= track position 45 are silent. If I move a track from a position >= 45 to a position <= 44 this track is played.
There are no underrun/overrun issues and DSP/CPU load is ok, if either the internal audio device or a Focusrite Scarlet 18i20 2nd gen is used.
Audio out is routed to 1+2 + 7+8 for all tracks via Cubasis, or alternatively to 1+2 or 7+8 via AUM.
What could cause the audio track limit?