Cheap And Discounts XD99 Exploring World of Sound ADAU1401 Single Chip DSPmini Learning Board for DIY Enthusiasts Built in 28/56bit DSP,ADC,DAC Wholesale. Buy Directly From Merchant Shop1104122148 Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.