GEM WS400 Piano Workstation Overview

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GEM WS400 Piano Workstation Overview

December 26, 2020 | | No Comments


Based on the renowned GEM WS2 Keyboard technology, the GEM WS400 enhanced the already excellent WS2 features, with a 88 note dynamic weighted keyboard.

Issues: The WS Series has SRAM for internal storage. This SRAM (Static RAM), uses a rechargeable NiCd backup battery which is prone to leaking and the battery acid when leaking, often corrodes the PCB and components.  Recommend changing the NiCd battery immediately for a separate battery pack, mounted away from the PCBs.

Upgrades: The Operating System (Firmware), is stored in EPROM (erasable programmable read-only memory).  Various releases were made and can updated to the latest (at the time).  The EPROM releases can be found in GEM & LEM EPROM Information and all EPROM BIN files can be found in the GEMClub Members Downloads area.

Disks: A large range of GEM and GEMClub members disks can be found in the GEMClub Members Downloads area.

  • 2 Megabytes of PCM samples and waveforms
  • 128 User programmable voices, complete with multi-sampled Grand Piano
  • 128 User programmable GLOBAL presets
  • 2 User programmable Digital Effects Processors with 128 Reverberations + 128 other effects (Chorus, Flanger, Delay, Phaser)
  • Dynamic 88 note weighted keyboard
  • 5 Splits / 5 Layers / 3 level Dynamic Switch
  • High level user interface for Real-Time performances, including Pitch Ball, Pedalboard and programmable Function pedals
  • 32 Internal Styles ; up to 32 User programmable Styles
  • 64 percussion sounds divided into 5 Drum sets: Rock Dance Jazz Ethnic Human
  • Multi Track Sequencer with professional editing for Real-time, Songs, Style Songs, Pattern Songs
  • Chain Compose function
  • Optional 3.5″ Disk Drive (up to 10 complete dumps of Voices, Globals, Styles, Patterns, Songs, on each disk)
  • Pre-programmed disks available
  • 40 W + 40 W stereo, 3 way, 6 speakers
  • Digital Pre-amplifier
  • Dimensions WS 400 ( H x L x D ) mm. 842 x 1440 x 470


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Dave Williams

Original and sole proprietor of GEMWorks Europe, later renamed to GEMClub - Generalmusic Owners Club.

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