RTcmix Documentation

MSHAKERS

the "Shakers" PhISEM and PhOLIES physical model (in package insts.stk)

MSHAKERS realizes the sound of many 'shaken' instruments (maracas, sleigh bells, change rattling in coffee mugs, etc.) using a "stochastic modelling" approach that Perry Cook developed. There are a large number of diverse sounds available through this one instrument -- try 'em all!

It was originally adapted from Perry Cook and Gary Scavone's STK, the Synthesis ToolKit for doing amazing physical model stuff.

Here's what Perry says about "Shakers":

PhOLIES (Physically-Oriented Library of Imitated Environmental Sounds) is a similar approach for the synthesis of environmental sounds. This class implements simulations of breaking sticks, crunchy snow (or not), a wrench, sandpaper, and more.

p-fields:

/* MSHAKERS - the "Shakers" physical model instrument in
        Perry Cook/Gary Scavone's "stk" (synthesis tookkit).

   p0 = output start time
   p1 = duration
   p2 = amplitude multiplier
   p3 = energy (0.0-1.0)
   p4 = decay (0.0-1.0)
   p5 = # of objects (0.0-1.0)
   p6 = resonance freq (0.0-1.0)
   p7 = instrument selection (0-22 -- see "instruments" file for listing)
   p8 = percent of signal to left output channel [optional, default is .5]

*/

Sample scorefile #1:

rtsetparams(44100, 2)
load("MSHAKERS")

st = 0
numobjs = 0
for (i = 0; i < 20; i = i+1)
{
        MSHAKERS(st, 0.5, 20000, 0.8, 0.8, numobjs, 0.1, 0)
        numobjs = numobjs + 0.05
        st = st + 0.2
}

st = st + 0.5
energy = 0
for (i = 0; i < 20; i = i+1)
{
        MSHAKERS(st, 0.5, 20000, energy, 0.8, 0.5, 0.1, 0)
        energy = energy + 0.05
        st = st + 0.2
}

st = st + 0.5
decay = 0
for (i = 0; i < 20; i = i+1)
{
        MSHAKERS(st, 0.5, 20000, 0.8, decay, 0.5, 0.1, 0)
        decay = decay + 0.05
        st = st + 0.2
}

st = st + 0.5
resofreq = 0
for (i = 0; i < 20; i = i+1)
{
        MSHAKERS(st, 0.5, 20000, 0.8, 0.8, 0.5, resofreq, 0)
        resofreq = resofreq + 0.05
        st = st + 0.2
}

Sample scorefile #2:

rtsetparams(44100, 2)
load("MSHAKERS")
t = 0
inst = 0
for (j = 0; j < 23; j = j+1)
{
        for (i = 0; i < 20; i = i+1)
        {
                MSHAKERS(st, 0.5, 20000, 0.9, 0.8, 0.5, 0.7, inst)
                numobjs = numobjs + 0.05
                st = st + 0.2
        }
        inst = inst + 1
}