Patent ID: 8124864

Claim:
A user interface apparatus for instructing, via input means, and displaying information on a display screen, the information supplied from musical tone signal processing means that processes an input musical signal with one or more channels, the information displayed on a portion of the display screen as a localization-frequency plane having a localization axis indicating the output direction of the input musical signal and a frequency axis indicating a frequency of the input musical signal, the apparatus comprising: first information acquisition means for acquiring localization information and a level of each of a plurality of frequency bands of the input musical signal, the localization information indicating an output direction of the input musical signal with respect to a reference localization that has been set in advance, the localization information calculated from the input musical tone signal; first display location calculation means for calculating a first display location of the output direction of the input musical tone signal for each of the frequency bands corresponding to the localization information, the first display location for display on the display screen; first level distribution calculation means for calculating (i) a primary first level distribution, based on the first display locations of each of the frequency bands and the levels of the frequency bands corresponding to each of the first display locations, in which the level of the frequency band that corresponds to each of the first display locations is expanded and obtained using a specified distribution in each of the frequency bands, and (ii) a secondary first level distribution aggregating all of the frequency bands; and first display control means for controlling the levels of the secondary first level distribution as heights with respect to the localization-frequency plane, and for displaying, on the display screen, the secondary first level distribution from a direction of the heights, wherein the respective heights are displayed so as to be discriminated from each other.