Pessoal, boa tarde! Em 15 de março a r-br completará 5 anos. Meus parabéns aos mantenedores da lista e todos seus usuários por essa importante fonte de aprendizado. Abaixo vai um código que encontrei na rede e que permite tocar o "Parabéns pra você" no R. ### <code r> # browseURL(" http://stackoverflow.com/questions/31782580/how-can-i-play-birthday-music-us... ") library("dplyr") library("audio") notes <- c(A = 0, B = 2, C = 3, D = 5, E = 7, F = 8, G = 10) pitch <- "D D E D G F# D D E D A G D D D5 B G F# E C5 C5 B G A G" duration <- c(rep(c(0.75, 0.25, 1, 1, 1, 2), 2), 0.75, 0.25, 1, 1, 1, 1, 1, 0.75, 0.25, 1, 1, 1, 2) bday <- data_frame(pitch = strsplit(pitch, " ")[[1]], duration = duration) bday <- bday %>% mutate(octave = substring(pitch, nchar(pitch)) %>% {suppressWarnings(as.numeric(.))} %>% ifelse(is.na(.), 4, .), note = notes[substr(pitch, 1, 1)], note = note + grepl("#", pitch) - grepl("b", pitch) + octave * 12 + 12 * (note < 3), freq = 2 ^ ((note - 60) / 12) * 440) tempo <- 120 sample_rate <- 44100 make_sine <- function(freq, duration) { wave <- sin(seq(0, duration / tempo * 60, 1 / sample_rate) * freq * 2 * pi) fade <- seq(0, 1, 50 / sample_rate) wave * c(fade, rep(1, length(wave) - 2 * length(fade)), rev(fade)) } bday_wave <- mapply(make_sine, bday$freq, bday$duration) %>% do.call("c", .) play(bday_wave) ### </code> ​ ================================================ Éder Comunello Agronomist (UEM), MSc in Environ. Sciences (UEM) DSc in Agricultural Systems Engineering (USP/Esalq) Brazilian Agricultural Research Corporation (Embrapa) Dourados, MS, Brazil |<O>| ================================================ GEO, -22.2752, -54.8182, 408m UTC-04:00 / DST: UTC-03:00