i2s (and other digital audio standards) based mono digital audio out with optional analog input mixing. Separate speaker input voltage allows for 3.3-5.5V in. Higher voltage provides for more wattage and efficiency. Can drive up to 2W and up to an 8ohm speaker in addition to headphone output. Designed to provide effects or stereo output in a pair.
Any software related will be released under BSD or MIT license. SAAS or cloud based software will be AGPL.