scanning of the keyboard and control panel. There is little public documentation available on these cards, as their design was the unique asset of the Synclavier. However, their structure was similar to other digital synthesizers of the mid-late 1970s realized in Medium Scale Integration (MSI) hardware, such as the Bell Labs Digital Synthesizer. Black panel models On 1970s–late 1980s: Synclavier I (1977) Hand Operated Processor (HOP box): a troubleshooting tool for the Synclavier system, connected to ABLE computer via "D01 Front Panel Interface Card". Synclavier II (1980): 8-bit FM/additive synthesis, 32-track memory recorder, and ORK keyboard. Earlier models were entirely controlled via ORK keyboard with buttons and wheel; a VT100 terminal was subsequently introduced for editing performances. Later models had a VT640 graphic terminal for graphical audio analysis (described below). Original Keyboard (ORK, c.1979): original musical keyboard controller in a wooden chassis, with buttons and silver control wheel on the panel. Sample-to-Disk (STD, c.1982): a first commercial hard disk streaming sampler, with 16-bit sampling at up to 50 kHz. Sample-to-Memory (STM): later option to sample sounds and edit them in computer memory. Direct-to-Disk (DTD, c.1984): an early commercial hard disk recording system. Signal File Manager: a software program operated via VT640 graphic terminal, enabling 'Additive Resynthesis' and complex audio analysis. Digital Guitar Interface SMPTE timecode tracking MIDI interface Synclavier PSMT (1984): a faster ABLE Model C processor-based system, with a new 'Multi-Channel-Distribution' real-time digitally controlled analog signal routing technology, and 16-bit RAM-based stereo sampling subsystem. The monaural FM voice card was doubled up and enabling software panning for stereo output was introduced. Velocity/Pressure Keyboard (VPK, c.1984): a weighted velocity/after-pressure sensitive musical keyboard controller, was introduced. This had a black piano lacquer finished chassis, a larger display, additional buttons and a silver control wheel. Ivory panel models In late 1980s–1993; operated via Macintosh II as terminal. Synclavier 3200 Synclavier 6400 Synclavier 9600 Synclavier TS (Tapeless Studio): consists of Synclavier and Direct-to-Disk Synclavier Post Pro: consists of Direct-to-Disk Synclavier Post Pro SD (Sound Design): consists of small Synclavier and Direct-to-Disk Notable users Laurie Anderson is credited with using the Synclavier on her albums Mister Heartbreak (1984), United States Live (1984) and the 1986 soundtrack album Home of the Brave. Wally Badarou: used the Synclavier II on Level 42 and solo studio albums, as well as on the 1985 Kiss of the Spider Woman movie additional soundtrack. Tony Banks of Genesis used a