Volume Up

<svg
    xmlns="http://www.w3.org/2000/svg"
    width="512"
    height="512"
    viewBox="0 0 512 512"
>
    <linearGradient
        id="a"
        x1="75.066"
        x2="436.934"
        y1="436.934"
        y2="75.066"
        gradientUnits="userSpaceOnUse"
    >
        <stop offset="0" stop-color="#e81e25" />
        <stop offset=".108" stop-color="#ea3522" />
        <stop offset=".416" stop-color="#f1711c" />
        <stop offset=".678" stop-color="#f59d17" />
        <stop offset=".881" stop-color="#f8b814" />
        <stop offset="1" stop-color="#f9c213" />
    </linearGradient>
    <path
        fill="url(#a)"
        d="M256 0C114.841 0 0 114.841 0 256s114.841 256 256 256 256-114.841 256-256S397.159 0 256 0zm0 496C123.664 496 16 388.336 16 256S123.664 16 256 16s240 107.664 240 240-107.664 240-240 240zm24.324-357a15.011 15.011 0 0 0-15.161 0l-78.055 45.066a8 8 0 0 0-7.9-6.776h-38.582a8 8 0 0 0-8 8v141.417a8 8 0 0 0 8 8h38.585a8 8 0 0 0 7.9-6.775L265.164 373a15.16 15.16 0 0 0 22.736-13.133V152.133A15.006 15.006 0 0 0 280.324 139zM171.211 318.7h-22.585V193.293h22.585zM271.9 358.414l-84.692-48.9v-107.03l84.692-48.9zM391.373 256a8 8 0 0 1-8 8H353.53v29.843a8 8 0 1 1-16 0V264h-29.842a8 8 0 0 1 0-16h29.842v-29.842a8 8 0 0 1 16 0V248h29.843a8 8 0 0 1 8 8z"
    />
</svg>