“Landscape Mixtures” is a composition based on sonographic analysis of soundscape recordings of the streets of Bogota, Colombia. It involves tape music, live electronics and 15 acoustic instruments, including two flutes, two clarinets, horn, strings and percussion.

Technical notes:

Soundscape and instrumental recordings were performed using a Zoom H4 handheld digital recorder featuring condenser microphones arranged in XY technique (24 bits-44.1 KHz). Sonographic analysis was made via SPEAR 0.7.4, a software for audio analysis based on the traditional McAulay-Quatieri technique. Sampled-based spectral data was manipulated through the software, in order to benefit the creation of compositional procedures and harmonic groups based on pitches and melodic lines shown by the partials of soundscape and instrumental recordings. Signal processing patches programmed via Pure Data provided the means for timbre stretching and timbre stamp techniques, along with the use of reverberation and delay networks. Such techniques were key in the development of the electroacoustic discourse within the composition. Pure Data was also used to create an interface for playing back the tape part during the work live execution; an additional performer is intended to trigger a series of tape samples according to time marks in the musical score and the instruction of the ensemble's conductor.