r="ch1" class="text-xl">CH1</label>
            <div class="flex items-center space-x-2">
              <button
                id="solo1_btn"
                type="button"
                class="toggle"
                data-target="solo1"
                aria-pressed="false"
                onclick="toggleButton(this)"
              >
                SOLO
              </button>
              <input type="hidden" id="solo1" name="solo1" value="0" />
              <button
                id="mute1_btn"
    