160 MHz ( at the cost of just 50mW )

// https://github.com/cnlohr/ws2812esp8266/blob/master/user/user_main.c

// user_init
REG_SET_BIT(0x3ff00014, BIT(0));
os_update_cpu_frequency(160);

Update WS2812b driver to new CPU speed

// https://github.com/cnlohr/ws2812esp8266/blob/master/user/ws2812.c

void ICACHE_FLASH_ATTR SEND_WS_0()
{
    uint8_t time;
    time = 5;
    while(time--) WRITE_PERI_REG( PERIPHS_GPIO_BASEADDR + GPIO_ID_PIN(WSGPIO), 1 );
    time = 17;
    while(time--) WRITE_PERI_REG( PERIPHS_GPIO_BASEADDR + GPIO_ID_PIN(WSGPIO), 0 );
}
void ICACHE_FLASH_ATTR SEND_WS_1()
{
    uint8_t time;
    time = 19;
    while(time--)WRITE_PERI_REG( PERIPHS_GPIO_BASEADDR+GPIO_ID_PIN(WSGPIO),1);
    
    time = 7;
    while(time--) WRITE_PERI_REG( PERIPHS_GPIO_BASEADDR + GPIO_ID_PIN(WSGPIO), 0 );
}

Adjust udpserver_recv ( I have 14 leds , meaning N_LEDS=14 and the dB is scaled accordingly in the winamp plugin )

// https://github.com/cnlohr/ws2812esp8266/blob/master/user/user_main.c

udpserver_recv(void *arg, char *pusrdata, unsigned short len)
{
    struct espconn *pespconn = (struct espconn *)arg;

    if( len ==0 || len>20)
        return;

    s_inDb = atoi(pusrdata);

    if( s_inDb>N_LEDS)
        s_inDb = N_LEDS;

// DBG ..... 
}

Udate WS2812B, the HSVtoHex is from the top routine made by cnlohr ( the base for this hack )

// https://github.com/cnlohr/ws2812esp8266/blob/master/user/user_main.c

static void ICACHE_FLASH_ATTR
procTask(os_event_t *events)
{
    int i=0;
    uint32_t hex; // color
    system_os_post(procTaskPrio, 0, 0 );
    if( events->sig == 0 && events->par == 0 )
    {
        //Idle Event.
    }
  
    if( s_ledDb !=s_inDb)
    {
        s_ledDb = s_inDb;
        for( i = 0; i <s_ledDb; i++ )
        {
            // see cnlohr top, to play with patterns
            hex=HSVtoHEX( i*.05 + frame*.01, 1, 1.0 ); 
            buffer[0+i*3] = (hex>>8);
            buffer[1+i*3] = (hex);
            buffer[2+i*3] = (hex>>16);
        }
        // OFF 
        for( i=s_ledDb; i<N_LEDS; ++i)
        {
            hex=0; //"black"
            buffer[0+i*3] = (hex>>8);
            buffer[1+i*3] = (hex);
            buffer[2+i*3] = (hex>>16);
        }

        WS2812OutBuffer( buffer, N_LEDS*3 );
        frame++;
    }

}

Hack a winamp plugin/ gstreamer ....or use ADC to produce "s_inDb"

// http://sourceforge.net/projects/vu-meter/
// In Svis.c  by Boris Ribov
// Analog VU Meter for Winamp - Version 1.50

// Global
int                  client_s=0;    // Client socket descriptor
struct sockaddr_in   server_addr;   // Server Internet address
int                  addr_len;      // Internet address length
char                 out_buf[4096]; // Output buffer for data
WSADATA wsaData;


// init
WORD wVersionRequested = MAKEWORD(1,1);       // Stuff for WSA functions
WSAStartup(wVersionRequested, &wsaData);
client_s = socket(AF_INET, SOCK_DGRAM, 0);
server_addr.sin_family = AF_INET;             // Address family to use
server_addr.sin_port = htons(7777);           // Port num to use
server_addr.sin_addr.s_addr = inet_addr("192.168.4.1"); // IP address to use


// render, UDP send dB  

// quick & dirty calculation to match 14 led
aCurPeak =  (5*log((output0+output1)/2 )+0.5)-8;

if( aCurPeak<0 )
    aCurPeak = 0;
        
if( aPrevPeak != aCurPeak )
{
    aPrevPeak = aCurPeak;
    sprintf(out_buf,"%d",(int)aCurPeak);

    sendto(client_s, out_buf, (strlen(out_buf) + 1), 0,
    (struct sockaddr *)&server_addr, sizeof(server_addr));
}

Ip adress is default 192.168.4.1 and port 7777 since it is based on https://github.com/cnlohr/ws2812esp8266.

// https://github.com/cnlohr/ws2812esp8266/blob/master/user/user_main.c

wifi_set_opmode( 2 ); //We broadcast our ESSID, wait for peopel to join.

Connect PC to Esp8266 and start Winamp + plugin .....ready to rock !!