Portable electronic musical instrument

An electronic musical instrument which comprises:

• (a) an oscillator for producing a fundamental frequency,
• (b) frequency division means for providing a plurality of frequencies that may be combined to produce chords from the fundamental frequency on a plurality of outputs from said frequency division means,
• (c) a chord keyboard connected to the plurality of outputs from said frequency division means for selectively supplying said plurality of frequencies as a chord to an output of said chord keyboard in response to key closures on said chord keyboard,
• (d) means connected to at least enough of the plurality of outputs from said frequency division means to provide signal frequencies corresponding to a scale of notes from the chord signals on the outputs as connected,
• (e) a scale keyboard connected to said scale note frequency providing means for selectively gating scale note frequencies to an output of said scale note frequency providing means in response to key closures on said scale keyboard, and
• (f) a sound producing means connected to the output of said chord keyboard and to the output of said scale note frequency providing means.

A self contained, portable electronic musical instrument, which comprises a static system including:

• (a) a keyboard having a plurality of scale keys, a plurality of chord keys, and keys for selecting a key of notes from which the chord keys may be used to generate chords,
• (b) means for generating a fundamental frequency,
• (c) a prescaler frequency divider connected to said fundamental frequency generating means and to said key of notes selection keys for dividing the fundamental frequency by different divisors depending on selective actuation of said key of notes selection keys,
• (d) a programmable frequency divider network connected to receive a selected output frequency from said prescaler frequency divider and to said scale and chord keys and capable of producing different output frequencies depending on which of said chord and said scale keys of said keyboard are activated, and
• (e) sound generation means connected to receive output frequencies from said programmable frequency divider network.

An electronic musical instrument, which comprises:

• (a) an oscillator for producing a fundamental frequency,
• (b) a keyboard including a plurality of scale keys and plurality of chord keys,
• (c) a prescaler frequency divider connected to receive the fundamental frequency from said oscillator and said scale keys of said keyboard for dividing the fundamental frequency by different divisors depending on selective actuation of said scale keys, to transform otherwise dissonant scale notes being played to compatible scale notes,
• (d) a programmable frequency divider network connected to receive a selected output frequency from said prescaler frequency divider and to said scale keys and said chord keys and capable of producing different output frequencies depending on which of said scale keys and said chord keys are activated, and
• (e) sound generation means connected to receive output frequencies from said programmable frequency divider network.

An electronic musical instrument which comprises:

• an oscillator for producing a fundamental frequency,
• a keyboard including a plurality of scale keys and a plurality of chord keys,
• a programmable frequency divider connected to said oscillator for dividing said fundamental frequency to produce different output frequencies on a plurality of outputs depending on scale and chord key closures,
• sound generation means connected to receive the different output frequencies on the plurality of outputs from said programmable frequency divider, and
• means connected to said programmable frequency divider and to groups of the scale keys within which the playing of more than one scale note together would produce dissonant sounds for transforming any more than one note within each group being played together to another note outside the group.