sounds_demo/css/index.css

.container {
  width: 1600px;
  margin: 25px auto;
}

.wrapper {
  display: flex;
  justify-content: space-around;
  align-items: center;

  width: 1600px;
  /* height: 400px; */
  margin: 10px 0;
  /* border: 1px solid black; */
}

.wrapper_span {
  display: block;
  padding: 15px 5px;
  font-size: 25px;
  writing-mode: vertical-lr;
  border: 1px solid rgb(32,116,98);
}
.pcmGraph_wrapper{
  display: flex;
  justify-content: space-around;
  align-items: center;

  width: 800px;
  height: 200px;
  margin: 10px 0;
}

/* .pcmGraph_wrapper span {
  display: block;
  padding: 15px 5px;
  font-size: 25px;
  writing-mode: vertical-lr;
  border: 1px solid rgb(32,116,98);
} */

#pcmGraph {
  width: 730px;
  background-color: #bfa;
}

#fftGraph,
#stftGraph {
  width: 730px;
  height: 512px;
  background-color: #bfa;
}