Apple Computer Tuesday cut the price of its cheapest digital music player, the iPod Shuffle, and launched a smaller-capacity version of its mid-priced iPod Nano. Apple said the 512-megabyte Shuffle will now sell for $69, down from $99 previously. The 1-gigabyte model will sell for $99, down from $129. The 512-megabyte version holds about 120 songs. The new 1-gigabyte Nano, the sleek iPod model that won rave reviews from critics and consumers when it was introduced last September, was priced at $149.