Acid Pro (often stylized ACID) is a professional digital audio workstation (DAW) software program currently developed by Magix Software. It was originally called Acid pH1 and published by Sonic Foundry, later by Sony Creative Software as Acid Pro, and since spring 2018 by Magix as both Acid Pro and a simplified version, Acid Music Studio. Acid Pro 8 (the current version ) supports 32-bit and 64-bit architectures, and has MIDI, ASIO, VST, VST3, DirectX Audio, and 5.1 surround sound support. History Acid was first launched in 1998, as Acid pH1, by Sonic Foundry in Madison, Wisconsin. It was a loop-based music sequencer, in which Acid Loop files could be simply drag-and-dropped then automatically adjust to the tempo and key of a song with virtually no sonic degradation. A website for budding musicians using Acid technology was set up, named AcidPlanet.com. The software became very popular in the late 1990s and early 2000s among composers, producers, and DJs interested in quickly creating beats, music textures, or complete compositions and orchestrations, that would work with virtually any tempo or key signature. Sonic Foundry sold its Acid, Vegas, Sound Forge, CD Architect, Siren, VideoFactory, ScreenBlast, and Batch Converter product lines to Sony Pictures Digital in July 2003; the merger resulted in the new Sony Creative Software division. Sony's Acid Pro 6 (released in the third quarter of 2006) introduced a full-digital audio workstation that also included MIDI and multitrack audio recording with full support for ASIO computer-audio and VST synthesizer-plugin standards. On May 20, 2016, German company Magix Software GmbH announced they had acquired the majority of the products in the Sony Creative Software portfolio. These include Acid Pro, Vegas Pro, Movie Studio, and Sound Forge Pro. Acid Pro 8, the first version since Magix's acquisition, was announced on January 21, 2018 and released in spring 2018. The update came with new modern features including an enhanced interface, support for 64-bit, additional samples, VST3 support, over 20 DirectX audio effects, the ability to mix in 5.1 surround sound, and new features named Media Manager, BeatMapper, and Chopper. In one version or another, Acid Pro runs on PCs with all versions of Microsoft Windows since Windows 2000; Acid Pro 8 requires Windows 8.1 or later. Versions do not exist for macOS or Linux. Acid Loops Acid Loop (trademark), also Acidized or Acidified loop (generic terms), refers to a sound clip which can be repeated