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KS1 - One Keyboard MIDI stack



Although many organists will regard two keyboards as an absolute minimum, there are a few situations where this one-keyboard "stack" may prove useful, for example:
- where something very portable is needed
- for use as a "digital harmonium"
- to stand on top of an existing MIDI-capable instrument to provide an additional manual

The KS1 one-keyboard stack has 16 organ pistons (the same as the two-keyboard version) which can be used as combination pistons, couplers, or other organ controls. They can even carry out Hauptwerk menu commands.

The stack plugs directly into the USB ports of your computer. It incorporates reliable, well-proven M-Audio MIDI keyboard technology, but re-packaged in a much more organist-friendly format. Use the stack on its own, or combined with a MIDI pedalboard. Can be placed on a table, desk or other convenient surface, or built into an existing console.

The stack is guaranteed for one year.  See Our Selling Policy for the terms of our guarantee.

Features at a glance
* one full-size 61 note keyboard
* 16 pistons arranged in four groups of
* semi-weighted touch
* substantial bolted MDF chassis - no wobble!
* requires no external power supply and no batteries (draws power from USB connections)
* requires no MIDI-to-USB converter
* non-scratch feet (which may be removed if stack is to be bolted down)
* option to connect swell pedals
* option to attach additional pistons
* option to add music stand
* finished in black  (goes with anything!) Other colours are available
* can be transported in boot or back seat of most cars
* fully compatible with Hauptwerk
* a generic pdf User Guide is available from our Downloads page
* needs 2 available USB ports

Computer requirements
The KS1 should work with any reasonably up-to-date computer whether PC or Mac. The necessary drivers may already be installed. If not, they can easily be downloaded free from the M-Audio website ( If in doubt, go to the M-Audio website, select your operating system and check that drivers are available for the following devices:
Keystation 61
* Ekeys

The stack is not in itself a musical instrument. It only works in conjunction with suitable software (eg Hauptwerk or Miditzer). Obviously, your computer must also meet the requirements for your chosen software.

 Note: You will need 2 free USB ports to connect the stack (and you may need a further 2 for the Hauptwerk dongle and a MIDI pedalboard.) If your computer does not have sufficient ports, you can use a USB hub to expand it.

Physical dimensions
Overall width (side to side)                880 mm

Overall depth (front to back)              280 mm
Height with feet                                  110 mm
Height without feet                             100 mm
Length of keys                                  137 mm
Bolt down sockets (with feet removed)  4 X M4

 Keyboard touch
The keys are taken from M-Audio Keystation 61 MIDI keyboards and have exactly the same touch, which the manufacturer describes as “semi-weighted". We wouldn’t claim that this touch is completely perfect from an organist’s point of view -  the contact point is a little too low - but in our opinion it still provides a perfectly workable solution and an enjoyable playing experience.

The 16  pistons can be configured to do almost anything in Hauptwerk. Most obviously they can be used as combination pistons, but they can also carry out menu commands. Particularly useful ones are to advance the registration sequencer, or to start and stop the built-in recording. The pistons are not numbered, but they are grouped into fours for ease of identification.

 Swell pedal connection
The rear panel of the KS1 includes two stereo jack sockets to which standard keyboard expression pedals can be attached. Useful if your pedalboard has no swell pedals (or not enough). Simply bolt additional expression pedal(s) to your pedalboard and pass the lead(s) up to the back of the stack.

 Auxiliary piston ports
The rear panel of the KS1 provides two 9-way D sockets to which up to sixteen additional pistons (or other switch-type inputs) can be attached. One use for this feature is to add toe pistons to a pedalboard which doesn't have any (or not enough).

 MIDI output channel
Keyboard MIDI output is on channel 1. For a small additional cost an extra piston can be fitted which allows selection of channel (1-16).  This is not required for Hauptwerk use. Pistons always output on channel 1.




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