Others can debate the value and effectiveness, but to specifically answer your question about using a digital microscope, here’s a 5 min video by Mike Fremer who I consider a premier expert https://youtu.be/otysEyET6yE
You might also enjoy and learn from his one hour siminar on all aspects of turntable setup, including info on the microscope/SRA adjustment
https://www.youtube.com/watch?v=eQDa7suJn64&feature=share
Happy listening
You might also enjoy and learn from his one hour siminar on all aspects of turntable setup, including info on the microscope/SRA adjustment
https://www.youtube.com/watch?v=eQDa7suJn64&feature=share
Happy listening