Size Matters - Reed + yarn = fabric

How do you match the reed to the yarn? One of the the things I have notice with people new to weaving is a loom is threading with yarn that is too thin and the results are not what the new weaver intended. This recording was made to try and help you find a better fit for your yarn with your new loom. FYI the chart for yarn sett by Schacht Spindle Company should read 4/2 1680yd/lb not 840