#player {
    position: relative;
}

#btn_start {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 200px;
    height: 115px;
    margin-left: -100px;
    margin-top: -57px;
    z-index: 2;
}

#instruments {
    position: relative;
}

#instruments img {
    line-height: 0;
    vertical-align: top;
}

.instrument {
    margin: 16px 11px;
    position: relative;
}

/* stretch image a little to fit wider layout */
.waveform {
    width: 724px;
    height: 39px;
    padding-top: 4px;
}

.description {
    position: absolute;
    top: 10px;
    left: 100px;
    font-size: 20px;
    font-weight: bold;
    text-shadow: 1px 1px 4px #000;
}

#playhead {
    position: absolute;
    top: 0;
    left: 95px;
    width: 4px;
    height: 100%;
    background: #fff;
    border-radius: 2px;
    box-shadow: 1px 1px 5px 0 #000;
}