As part of his previous band, Lotus Lullaby, he and his bandmates competed in and won the Bank of Ireland National Student Music Awards in 2006, as well as the Murphy’s Battle of the Bands earlier the same year.

Following his success with “Commander Shepard”, Dunne eventually met with the marketing team from BioWare, the creative team behind the Mass Effect series, while he was at gamescom in Germany in August 2011. There he released another Mass Effect song, “Normandy”, based on the ending of Mass Effect 2. Coordinating with BioWare, Dunne became involved in the marketing campaign for the next game in the series, Mass Effect 3. Both voice actors for the male and the female Commander Shepard in the Mass Effect series (Mark Meer and Jennifer Hale, respectively) performed dramatic readings of parts of the song “Commander Shepard” before the release of the Mass Effect 3, to raise publicity. BioWare subsequently sent Dunne advance footage for use in making a song and accompanying music video based on Mass Effect 3, so that his release of “Take it Back” could coincide with the game’s launch. A line from his song “Commander Shepard” was also referenced in Mass Effect 3, with a character telling the player to “fight like a Krogan.” Dunne later made two additional songs based on the game; “Crucible” and “Kalros”.

From 2011 until February 2015, Dunne released new music videos on The Escapist (an online video gaming website) every two to four weeks, in addition to releasing them on his YouTube channel.

In late 2013, multiple copyright strikes were issued by YouTube against Dunne’s videos for use of his own music, as well as against other users who had used his music in their videos with permission. All of the strikes were initiated by INDMUSIC, on behalf of TuneCore, the company that distributed Miracle of Sound’s songs at the time. Though the incident was resolved successfully, Dunne commented that although TuneCore was trying to help artists, their efforts did more damage than good and that he depends on let’s plays and gaming videos to spread and popularise his music by word of mouth.

From November 2014 to September 2019, Dunne joined video game critic Jim Sterling and gaming journalist Laura Kate Dale (Laura K Buzz on social media) on a weekly podcast, the Podquisition, which primarily discussed video game and pop culture related news. He left the show after episode 250, citing being blocked on Twitter by unnamed figures in the videogame industry who had been criticized by Sterling and/or Dale on the podcast.

In traditional video game style, his albums are named in increasing levels – Level 1, Level 2 and so on. However, he has also released two other non-gaming-related albums. His instrumental album called Vistas had a mixed reception, receiving 3.5 out of 5 stars from Nick Mongiardo of Sputnik Music who said “Vistas has some issues with pacing and contains some jarring shifts in style, but anyone who enjoys chilled out instrumental music will love this.” His seventh album, Metal Up, a heavy metal compilation with some songs based on Irish folklore, topped the iTunes Metal chart for 2 days following its release in early 2015. Metal Up was described as mix of classic rock, hard rock, and metal, and was praised by Firstherd for its Celtic influences in some songs which were “very original when placed in a metal framework”. The album was also given a 5 out of 5 score by Rock Review.

Shortly before the Wasteland 2 Director’s Cut re-release in 2015, Dunne released a parody of the Dire Straits song “Money for Nothing”, titled “I want my RPG”. The lyrics of the song criticise modern free to play games, microtransactions and downloadable content and express the desire for more games of the old CRPG style. He did not include the song on any album, saying on Twitter that “It’s a parody of someone else’s song. Wouldn’t feel right to monetise it.” Dunne has also used his music to criticise quick time events in his Resident Evil 6 song “Wigglesticks”. It has been suggested that other indie games on limited budgets could improve the quality of their music by employing indie musicians such as Miracle of Sound.

In late 2016, he released “Pawns of War”, a Battlefield 1 inspired song where Dunne’s goal was to fuse the feel of the game’s soundtrack with old military marching tunes, creating a composition that focuses on soldiers doomed to be forgotten after being thrown into the “meat grinder” of WWI.