Lissajous is a real-time audio reactive graphics application built in Max/MSP and inspired by the work of Jules Antoine Lissajous.
Lissajous was first released as a standalone application and MaxForLive device on Audiobulb Records and is now fully compatible with theIsotonik World Collection with the addition of the included World Viewer which allow you to combine the outputs of various World Modules into one window.
The software shows sound oscillations as XY matrix functions and creates complex graphics curves. Lissajous graphically describes sound and allow observation of constantly varying signal voltage of two audio signals as function of time. Video generated by sound can be controlled in endless ways by giving to the user the possibility of a whole-new range of interactions.
This software generates sounds from the main two VCOs (VCO1, VCO2). Each of those complex VCOs moves from more flute-like to more electric guitar-like behavior giving the way to enrich the timbre. VCO-1, FQ1 & FQ2 control the frequency of VCO-1 and VCO-2, FQ1 & FQ2] control the frequency of VCO-2.
The Rotation parameter allows to slightly change the frequency of the VCO-2 only (in this case the VCO2-F2) creating an acustic beat effect and phase modulation.
The guitar-like VCOs can be transposed in frequency as overtones of a flutelike VCOs and triggered by the keaboard. The flonum set the way to multiply the guitarlike VCO frequency in order to get different overtones.
Pluck Position, Pluck AMP and Body Size are powerfull excitation methods for both electric guitar and the flute. It can be possible to color the pluck on the instrument with the Body Size parameter, to choose the position of the pluck with The Pluck Position parameter and the Pluck AMP control which set the strenght of the pluck on the physically modelled strings.
The outputs from guitar-like & flute-like strings are summed and combined with whatever breath Pressure the player provides and then fed into the “distortion unit”.
The LFO controls the Amplitude of the VCOs. It’s possible to sync or unsync the Freq with Ableton Live clock. The FQ LFO controls the speed of the LFO and the AMP LFO controls the amplitude
Feedback, Distortion and Filter Ratio parameters are used to square the Lissajous shapes. Feedback changes the internal Karlplus-Strong feedback coefficent and in this modeled system causes the sound to “build up” overtime. Filter Ratio interpolates between the one-pole filter of the flute and the lowpass filter of the plucked string. It’s also possible to add a noise signal with the Noise Gain control.
The delay section is designed following the looping process of the tape delay effect. It’s possible to change its Delay Time, FQ MOD parameter or overload the machine with the Feedback coefficent. LP–Filter is a Low-pass Filter on delay lines.
A Keyboard interface is provided to control VCOs Frequencies (it’s possible to use Ableton Live to send midi notes to the app).
Zoom is to control the distance of the rendering video zomming in and out from 0% to 300%. Change the Framesize to draw from 10 to 3072 points in time of the audio functions to be rapresented.
Other interesting and usefull video controls are the Shadow Trail, which controls the sharpness, the Line Width the size of the functions and the Drawing Style which sets the style of the drawings (Points, Lines, Line Strip,Trinagles).
DOWNLOAD – Lissajous User Guide