Echolot search­es for hid­den sound­ing and musi­cal mate­r­i­al that is saved in books. Writ­ten words that trans­mit seman­tic mean­ing are for us scores for sound and music. Trans­formed through the voice of the vis­i­tors into sound, the short and play­ful record­ings get over­layed, (de)composed, sent, resent and received by the lis­ten­er in musi­cal­ized form. An ini­tial­ly „sim­ple“ sem­bling record­ing of one voice trans­forms into a four-part fugue, into a mix of music and lan­guage and then into a rhyth­mic-elec­tron­ic