Editing Musical keyboard (section)

===Electronic keyboards===
[[File:Korg Monologue Synthesizer.jpg|thumb|The [[Korg Monologue]] synthesizer has 25 slim keys and an E-E range.]]

Simpler electronic keyboards have switches under each key. Depressing a key connects a circuit, which triggers tone generation. Most keyboards use a [[keyboard matrix (music)|keyboard matrix circuit]], in which 8 rows and 8 columns of wires cross — thus, 16 wires can provide 8 × 8 = 64 crossings, which the keyboard controller scans to determine which key was pressed.<ref>Dave Dribin. [http://www.dribin.org/dave/keyboard/one_html/ "Keyboard Matrix Help"], (June 24, 2000).</ref> The problem with this system is that it provides only a crude binary on/off signal for each key. Better electronic keyboards employ two sets of slightly offset switches for each key. By determining the timing between the activation of the first and second switches, the velocity of a key press can be determined, greatly improving the performance dynamic of a keyboard. The best electronic keyboards have dedicated circuits for each key, providing polyphonic aftertouch.

Advanced electronic keyboards may provide hundreds of key touch levels<ref name="fp80">[http://www.rolandus.com/products/details/1276/specs/ Digital piano specs] (100 pressure levels specified).</ref> and have 88 keys, as most pianos do.