slicer
Sample slicer. This object is to be used in conjunction with table/read and such objects. It produces two ramp signals (phase can be fed inside a window object, pos can go into a conv/interp and then into table/read interp to enable playback), and is easily chainable. The object is programmed to play the sample at the correct speed, based on the sized of the sample (hence the size menu). You can specify the start position and the (relative) length of the slice. Speed allows to tune the sample playback speed (not chromatically, unfortunately), reverse enables reversed playback. In case you want to chain several object, you can select the sample to play by feeding an integer (0, 1, 2 ...) inside sel inlet.
Inlets
bool32.rising trig
frac32.positive defphase
frac32.positive defpos
int32 sel
Outlets
int32 sel
bool32.pulse trig
frac32.positive phase
frac32.positive pos
Parameters
frac32.s.map speed
bool32.tgl reverse
frac32.u.map.ratio start
frac32.u.map.ratio len
Attributes
combo size
bool ttrig;
bool env;
int32_t freq;
uint32_t phase;
uint32_t phase_old;
int32_t pos;
int32_t sample_len;ttrig = 0;
env = 0;
freq = 0;
phase_old = 0;
phase = 0;
pos = 0;
sample_len = 1 << attr_size;freq = (4294967296 /
(___SMMUL(___SMMUL((1 << 27) - param_start << 3, param_len << 3),
sample_len << 4) +
1)) *
16;
freq += ___SMMUL(freq, param_speed) << 5;
if (inlet_trig && !ttrig && !inlet_sel) // se viene premuto il tasto
{
ttrig = 1;
env = 1;
phase = 0;
} else if (inlet_trig && !ttrig && inlet_sel) // se viene premuto il tasto
{
ttrig = 1;
env = 0;
phase = 0;
} else if (!inlet_trig) // se viene rilasciato il tasto
ttrig = 0;
if (!env) // se non siamo in fase di inviluppo
{
outlet_phase = inlet_defphase;
outlet_pos = inlet_defpos;
} else {
phase += freq; // il contatore avanza di un tot
if (phase >= phase_old) // se il contatore non ha resettato
{
phase_old = phase; // ok, continuiamo a contare
if (!param_reverse)
pos = param_start +
___SMMUL(phase >> 1,
___SMMUL((1 << 27) - param_start << 3,
param_len << 3)); // calcoliamo la nuova posizione
else
pos = param_start +
___SMMUL((1 << 27) - param_start << 3, param_len << 2) -
___SMMUL(phase >> 1,
___SMMUL((1 << 27) - param_start << 3, param_len << 3));
} else // se invece il contatore ha resettato
{
ttrig = 0; // rendiamo di nuovo disponibile il campione
env = 0; // non siamo più in fase di inviluppo
phase = 0;
phase_old = 0;
}
outlet_pos = pos;
outlet_phase = phase >> 5;
}
outlet_trig = inlet_trig;
outlet_sel = inlet_sel - 1;