// po-tweet! // patchSinOsc s => dac;// gain.4 => s.gain; // call chirpchirp( 127, 20, 1::second ); // call chirp (with tinc)chirp( 20, 120, 1.5::second, 100::ms ); // chirp functionfun void chirp( float src, float target, dur duration ){    chirp( src, target, duration, 1::ms );} // chirp function (with tinc)fun void chirp( float src, float target, dur duration, dur tinc ){    // initialize freq    src => float freq;    // find the number of steps    duration / tinc => float steps;    // find the inc    ( target - src ) / steps => float inc;    // counter    float count;     // do the actual work over time    while( count < steps )    {        // increment the freq        freq + inc => freq;        // count        1 +=> count;         // set the freq        Std.mtof( freq ) => s.freq;         // advance time        tinc => now;    }}