The guitar in that pic above was to be my ticket to fame and fortune. Determined to become the next big rock star, back in high school I bought a guitar. A Sears Silvertone, black with an orange starburst . Pretty cheap, about $25. My good friend Ken and I began practicing, and the first obstacle emerged. I couldn’t tune the blasted instrument! Oh, I knew where to press the strings and frets to match the tones of adjacent strings, but my ear couldn’t hear the differences. A minor obstacle, but…