Logic Pro is a digital audio workstation (DAW) and MIDI sequencer software application for the macOS platform. It was originally created in the early 1990s as Notator Logic, or Logic, by German software developer C-Lab which later went by Emagic. Apple acquired Emagic in 2002 and renamed Logic to Logic Pro. It is the second most popular DAW – after Ableton Live – according to a survey conducted in 2015. A consumer-level version based on the same interface and audio engine but with reduced features, called Logic Express, was also available at a reduced cost. Apple's GarageBand comes free with all new Macintosh computers and iOS devices and is another application built on Logic's audio engine. On December 8, 2011, the boxed version of Logic Pro was discontinued, along with Logic Express, and as with all other Apple software for Macs, Logic Pro is now only available through the Mac App Store. Features Logic Pro provides software instruments, audio effects and recording facilities for music synthesis. It also supports Apple Loops – royalty-free, professionally recorded instrument loops. Logic Pro and Express once shared many functions and the same interface. Logic Express was limited to two-channel stereo mixdown, while Logic Pro can handle multichannel surround sound. Logic Express only handled up to 255 audio tracks, depending on system performance (CPU and hard disk throughput and seek time), while, as of version 10.4.5, Logic Pro can handle up to 1000. Logic Pro can work with MIDI keyboards and control surfaces for input and processing, and for MIDI output. It features real-time scoring in musical notation, supporting guitar tablature, chord abbreviations and drum notation. Advanced MIDI editing is possible through Logic Pro's MIDI Transform Window, where velocity, pitch, pitch-bends, note length, humanize, and precise note positioning can be edited. Software instruments The software instruments included in Logic Pro X include: Drum Kit Designer, Drum Machine Designer, ES, ES2, EFM1, ES E, ES M, ES P, EVOC 20 PolySynth, Sampler, Quick Sampler, Step Sequencer, Klopfgeist, Retro Synth, Sculpture, Ultrabeat, Vintage B3, Vintage Clav, Vintage Electric Piano. These instruments produce sound in various ways, through subtractive synthesis (ES, ES2, ES E, ES M, ES P, Retro Synth), frequency modulation synthesis (EFM1), wavetable synthesis (ES2, Retro Synth), vocoding (EVOC 20 PolySynth), sampling (Sampler, Quick Sampler, Drum Kit Designer), and component modeling techniques (Ultrabeat, Vintage B3, Vintage Clav, and Vintage Electric Piano, Sculpture). As of version 10.2,