billion a year as of Q1 2014). Versions Early versions Logic 5 featured significant improvements in user interface, and increased compatibility with more types of computers, operating systems, and a wide range of audio interfaces. Logic 5.5.1 was the last version to be released for Windows. From Logic 6 onwards, the software would only be exclusively available on Mac OS. With Logic 6, Emagic added the availability of separately packaged software products that were closely integrated add-ons developed specifically for use with Logic, including software instruments, the EXS sampler and audio processing plug-ins. The Logic 6 package also included the stand-alone program Waveburner, for burning redbook audio CD standard-compliant CDR masters for replication, however, that application was considered a free bonus feature; it was not advertised as part of the package and did not include printed documentation. PDF documentation was included on the installer disc. In March 2004 Apple released Logic Pro 6, which consolidated over 20 different Emagic products, including all instrument and effect plug-ins, Waveburner Pro (CD Authoring application), and Pro Tools TDM support, into a single product package. Apple also released a scaled down version of Logic called Logic Express, replacing two previous versions that filled that position called Logic Silver and Logic Gold. Apple began promoting Logic Pro as one of its flagship software ‘Pro’ applications for the Macintosh platform. Logic Pro 7 Logic Pro 7 was released September 29, 2004. Most notably, Apple modified the interface of Logic 7 to look more like a product that was developed by Apple. Additions to Logic Pro 7 included: the integration of Apple Loops, Distributed Audio Processing (a technology for combining the power of multiple computers on a network), 3 new instruments including Sculpture (a sound modeling synth) and Ultrabeat (a drum synth and sequencer), and 9 new effect plug-ins including Guitar Amp Pro (guitar amp simulator), and a linear phase corrected version of their 6 channel parametric equalizer. In total, Logic Pro 7 now included 70 effect plug-ins and 34 instrument plug-ins. Pro-Tools TDM compatibility, which had been a feature of Logic since version 3.5, was not supported by Logic 7.2 on Intel-based Mac computers; TDM support returned with the release of Logic 8. Logic Pro 8 On September 12, 2007, Apple released the Logic Studio suite that included Logic Pro 8. Logic Pro was no longer a separate product, although a limited version Logic Express 8