An intonation training device for training musicians in just intonation.
As disclosed, the device is a pocket-sized portable device with an audio
output and a user interface which includes an LCD display and a device
such as a push button for selecting an item from a menu. When the device
is turned on, the LCD display indicates a key and the device emits a
sustained pure chord in the key. In a preferred embodiment, the pure
chord is a perfect fifth in the just scale for the key. To train his or
her intonation, the user then plays a sequence of notes in the key,
adjusting his or her intonation while playing to eliminate beats between
the note being played and the chord being emitted by the training device.
In other embodiments, the device may emit a third in the just scale for
the key. The user can use the menu item selection device to select
another key and the training device then continuously emits the chord in
the just scale for that key. The selected key appears in the LCD
display.The user interface permits specification of many modifications of
the chord emitted by the training device. The chord may be augmented or
diminished, major or minor, may include additional intervals, may have
timbres ranging from dark to bright, may be sounded in one of a number of
octaves, and may be calibrated to a number of different concert "A"s. The
modifications are selected from lists and the currently-selected
modification is visible in the LCD.Implementations disclosed include an
implementation that employs stored samples of the chords, an
implementation in which the chords are generated from waveforms, and an
implementation in a portable pocket-sized multimedia asset player.