fun void fourthshepard()
{
    SinOsc saw => Gain gain => dac;
    18000 => saw.freq;
    2. => saw.gain;
    while ( true )
    {
    1000::ms => now;
}
    // overall gain
    
}  


fun void fifthshepard()
{
    SinOsc saw => Gain gain => dac;
    18001 => saw.freq;
    2. => saw.gain;
    while ( true )
    {
        1000::ms => now;
    }
}

 
    spork ~fourthshepard();
    spork ~fifthshepard();

7.5::second => now;