Logic Pro X also includes Alchemy, a sample-manipulation synthesizer that was previously developed by Camel Audio. The software instruments are activated by MIDI information that can be input via a MIDI instrument or drawn into the MIDI editor. Audio effects Audio effects include amp and guitar pedal emulators, delay effects, distortion effects, dynamics processors, equalization filters, filter effects, imaging processors, metering tools, modulation effects, pitch effects, and reverb effects. Among Logic's reverb plugins is Space Designer, which uses convolution reverb to simulate the acoustics of audio played in different environments, such as rooms of varying size, or emulate the echoes that might be heard on high mountains. Distributed processing The application features distributed processing abilities (in 32-bit mode), which can function across an Ethernet LAN. One machine runs the Logic Pro app, while the other machines on the network run the Logic node app. Logic will then offload the effects and synth processing to the other machines on the network. If the network is fast enough (i.e., on the order of gigabit Ethernet), this can work in near real-time, depending on buffer settings and CPU loads. This allows users to combine the power of several Macintosh computers to process Logic Pro's built-in software instruments and plug-ins, and 3rd party processing plug-ins. As of version 10.0.7, Logic can access 24 processing threads, which aligns with the capabilities of Apple's flagship 12-core Mac Pro. History Creator and Notator In 1987, C-Lab released Gerhard Lengeling's MIDI sequencer program for the Atari ST platform called Creator. From version 2.0 onwards, released in 1988, a version with added musical notation capabilities was also available, called Notator, made with the help of Chris Adam. A later bundled multitasking utility called Soft Link rebranded the packages as Creator SL and Notator SL. In the United States, its main rivals at the time included Performer and Vision, whereas in Europe its main rivals were Steinberg's Pro 24 and later Cubase. Most MIDI sequencers presented a song as a linear set of tracks. However, Notator and Vision were pattern-based sequencers: songs were built by recording patterns (which might represent for example Intro, Verse, Chorus, Middle-8, Outro) with up to 16 tracks each, then assembling an Arrangement of these patterns, with up to 4 patterns playing simultaneously at any one time in the song. This more closely resembled working principles of hardware sequencers of the 1970s and 1980s. When it