Le LA en musique est un signale de 440Hz<\/p>\n\n\n\n
1\/F= 0,002272727 ms <\/p>\n\n\n\n Le format WAV Wikipedia WAV Le LA en musique est un signale de 440Hz 1\/F= 0,002272727 ms<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-5537","page","type-page","status-publish","hentry"],"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false},"uagb_author_info":{"display_name":"admin","author_link":"https:\/\/workboot.fr\/ciela\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"Le format WAV Wikipedia WAV Le LA en musique est un signale de 440Hz 1\/F= 0,002272727 ms","_links":{"self":[{"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/pages\/5537","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/comments?post=5537"}],"version-history":[{"count":7,"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/pages\/5537\/revisions"}],"predecessor-version":[{"id":6004,"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/pages\/5537\/revisions\/6004"}],"wp:attachment":[{"href":"https:\/\/workboot.fr\/ciela\/wp-json\/wp\/v2\/media?parent=5537"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"https:\/\/workboot.fr\/ciela\/wp-content\/uploads\/2025\/12\/Audacity_la440-1024x518.png\")
<\/a><\/figure>\n\n\n\n![\"\"](\"https:\/\/workboot.fr\/ciela\/wp-content\/uploads\/2025\/12\/laokteta-1024x518.png\")
<\/a><\/figure>\n\n\n\n\/*****************************************************************************************\n ___ ________ ___ ___ ___ ___ ________ ___ ___ ________\n |\\ \\ |\\ __ \\ |\\ \\ |\\ \\|\\ \\ |\\ \\|\\ __ \\|\\ \\|\\ \\|\\_____ \\\n \\ \\ \\ \\ \\ \\|\\ \\ \\ \\ \\\\_\\ \\ \\ \\\\_\\ \\ \\ \\|\\ \\ \\ \\\\\\ \\\\|___\/ \/|\n \\ \\ \\ \\ \\ __ \\ \\ \\______ \\ \\______ \\ \\ \\\\\\ \\ \\ __ \\ \/ \/ \/\n \\ \\ \\____\\ \\ \\ \\ \\ \\|_____|\\ \\|_____|\\ \\ \\ \\\\\\ \\ \\ \\ \\ \\ \/ \/_\/__\n \\ \\_______\\ \\__\\ \\__\\ \\ \\__\\ \\ \\__\\ \\_______\\ \\__\\ \\__\\\\________\\\n \\|_______|\\|__|\\|__| \\|__| \\|__|\\|_______|\\|__|\\|__|\\|_______|\n******************************************************************************************\/\n#include <stdio.h>\n#include <stdlib.h>\n#include <math.h>\n#include <stdint.h>\n#include <string.h>\n#include <unistd.h>\n#include <fcntl.h>\n#include <sys\/types.h>\n#include <sys\/stat.h>\n\n#ifndef M_PI\n#define M_PI 3.14159265358979323846\n#endif\n\nvoid write_wav_header(int fd, uint32_t sample_rate, uint32_t data_size) \n{\n uint32_t file_size = data_size + 36; \/* 44 - 8 *\/\n uint32_t fmt_size = 16;\n uint16_t audio_format = 1; \/* PCM *\/\n uint16_t num_channels = 1; \/* mono *\/\n uint32_t byte_rate = sample_rate * num_channels * 8 \/ 8;\n uint16_t block_align = num_channels * 8 \/ 8;\n uint16_t bits_per_sample = 8;\n \n \/* \u00c9criture de l'en-t\u00eate RIFF *\/\n write(fd, \"RIFF\", 4);\n write(fd, &file_size, 4);\n write(fd, \"WAVE\", 4);\n \n \/* \u00c9criture du chunk fmt *\/\n write(fd, \"fmt \", 4);\n write(fd, &fmt_size, 4);\n write(fd, &audio_format, 2);\n write(fd, &num_channels, 2);\n write(fd, &sample_rate, 4);\n write(fd, &byte_rate, 4);\n write(fd, &block_align, 2);\n write(fd, &bits_per_sample, 2);\n \n \/* \u00c9criture du chunk data *\/\n write(fd, \"data\", 4);\n write(fd, &data_size, 4);\n return;\n}\n\nint main(int argc, char **argv) \n{\n const char *filename = \"la440.wav\";\n const uint32_t sample_rate = 8000;\n const uint32_t duration = 1;\n const double frequency = 440.0;\n const double amplitude = 127.0;\n const double offset = 128.0;\n \n const uint32_t num_samples = sample_rate * duration;\n const uint32_t data_size = num_samples;\n\n uint32_t i;\n double time;\n double sample;\n uint8_t audio_sample;\n \n \/* Ouverture du fichier avec open() *\/\n int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);\n if (fd == -1) {\n printf(\"Erreur: impossible de cr\u00e9er le fichier %s\\n\", filename);\n return EXIT_FAILURE;\n }\n \n \/* \u00c9criture de l'en-t\u00eate manuellement *\/\n write_wav_header(fd, sample_rate, data_size);\n \n \/* G\u00e9n\u00e9ration des donn\u00e9es audio *\/\n for ( i = 0 ; i < num_samples; i++) \n {\n time = (double)i \/ sample_rate;\n sample = sin(2.0 * M_PI * frequency * time);\n audio_sample = (uint8_t)(offset + amplitude * sample);\n write(fd, &audio_sample, 1);\n }\n \n \/* Fermeture du fichier *\/\n close(fd);\n \n printf(\"Fichier %s cr\u00e9\u00e9 avec succ\u00e8s!\\n\", filename);\n printf(\"Format: 8 bits mono, %d Hz, 1 seconde\\n\", sample_rate);\n printf(\"Fr\u00e9quence: %.1f Hz (La4)\\n\", frequency);\n \n return EXIT_SUCCESS;\n}<\/pre>\n","protected":false},"excerpt":{"rendered":"