var edit = function (item) {
    var documentEditAudio = new XMLHttpRequest();
        documentEditAudio.open('GET', 'https://api.vk.com/method/audio.edit?aid=' + item.aid
                                            + '&owner_id=' + item.owner_id
                                            + '&artist=' + item.artist.toUpperCase()
                                            + '&title=' + item.title.toUpperCase()
                                            + '&no_search=' + 0
                                            + '&access_token=' + accToken, true);

        documentEditAudio.onload = function () {
            var answer = JSON.parse(documentEditAudio.response);
                console.log(answer);
    };

    documentEditAudio.send();
}

audios.response.forEach(function (item) {
    setTimeout(edit(item), 1000);
});