.AudioCustomButton .btn { width: 100%; height: 100%; }
.spinner {
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-left-color: #fff;
    border-radius: 50%;
    width: 16px;
    height: 16px;
    animation: spin 1s linear infinite;
    display: inline-block;
    margin-left: 10px;
    position:relative;
    top:-30px;
    left:176px;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}