i use both alcohol and daemon tools, sometimes the alcohol successes what daemon can’t do and i really don’t know which one creates a more qualified image. I also have the question that in dpm, is it important to choose the slowest option, because in alcohol you can choose 1x, but in daemon as far as i see the slowest is 4x. Also, while creating image 1x option is best quality? These are my questions. Thank you.
As a general rule for cds slower is better for dpm reading bur for dvds faster is better.
However, there are always exceptions to every rule.
Experiment with different speeds with your drive/s and see what works best for you. (e.g. one of my drives works best at 12x for cds).