Project #15.1 Guitar As Controller

Demo

Abstract

In this project we present a series of algo­rithms devel­oped to detect the fol­low­ing gui­tar play­ing tech­niques : bend, hammer-on, pull-off, slide, palm mut­ing, har­monic, pluck­ing point. Via the detec­tion of these infor­ma­tion, the instru­ment can be extended as a nat­ural way to con­trol exter­nal con­tent (i.e. loops, audio effects, videos, light changes, etc.). The gui­tar used is a Godin Mul­tiac with an under-saddle RMC hexa­phonic piezo pickup (one pickup per string, i.e six mono sig­nals, one per string). Two exhaus­tive data­bases have been recorded by two dif­fer­ent gui­tarists with dif­fer­ent play­ing tech­niques (fin­ger style pick­ing and plec­trum style pick­ing) to test the dif­fer­ent algorithms.

Off-line imple­men­ta­tion of the algo­rithms are show­ing good results. A global imple­men­ta­tion on a ded­i­cated soft­ware seems to be the solu­tion to pro­vide a more robust solu­tion to real-time hexa­phonic use. Imple­men­ta­tion on FPGA have been inves­ti­gated as well, in order to asses the prob­lem of the big amount of process– ing power needed for hexa­phonic detection.

Doc­u­ments

  • [2011,inproceedings] bib­tex Go to document
    Rebour­sière Loïc, Lähdeoja Otso, Bose Ricardo Chesini, Drug­man Thomas, Dupont Stéphane, Picard-Limpens Cécile, Riche Nico­las, « Gui­tar As Con­troller », in « QPSR of the nume­di­art research pro­gram », 2011, pp. 41–54.
    @INPROCEEDINGS{numediart_2011_s15_p1_report,
      author = {Lo\"{i}c Reboursi\`{e}re and Otso L\"{a}hdeoja and Ricardo Chesini Bose and Thomas Drugman and St\'{e}phane Dupont and C\'{e}cile Picard-Limpens and Nicolas Riche},
      title = {Guitar As Controller},
      booktitle = {{QPSR} of the numediart research program},
      year = {2011},
      editor = {Thierry Dutoit},
      volume = {4},
      number = {3},
      pages = {41-54},
      month = {9},
      organization = {numediart Research Program on Digital Art Technologies},
      url = {http://www.numediart.org/docs/numediart_2011_s15_p1_report.pdf}
    }