Thanks Grumpy_Mike.
I didn't think code alone could do this.
What I may not have said in my post was I tested the shiftIn code 10 mins prior to the SPI code. Midi connections were not changed from one to test to the other. Only the MISO, data and sck pins, so it is strange. Perhaps something touched something else without me noticing.
Once I obtain a replacement board I will regroup and try again.
Thank you Sir for your help, it has been invaluable. I do apologise if my questions have not given a bigger picture, I've just tried to keep questions simple and on-point.
Best Regards to you and your fellow forum helpers.