Mark Goodwin (born 17 October 1984), known by his stage name Mark db, is an Irish-born electronic musician and composer. He is known for his promotional and performance work in electronic music styles such as Dub-step and Drum and Bass since 2006, for which he won an IDMA award in 2011. He is also the founder of Play it by Ear Records and releases music under monikers such as Daigoro, Oedo