Retronyms, an iPhone- and iPad-software developing company, brought together four producers from across the electronic music spectrum, and commissioned them to create tracks using only one of its touch-friendly musical tools, the DopplerPad. Music makers Eskmo, Starkey, Exillon, and Jneiro Jarel each wrote a tune for the free downloadable EP, called Outer Spaces. Also, in celebration of the brand-new EP, the going price for the DopplerPad app has gone down to $7.99 at the App Store. You can download Outer Spaceshere.