Advanced Python - Sample Slicer

Using custom python functions to multiple amphibian variables

This example uses custom functions to generate 4 amphibian variables at once. It also uses presets, initialized values, and sample lists. The Sample Slicer is a complete livecoding program, ready to use. You can also extend it, add more samples to slice, add more amphibian variables, add more parameters, etc.

Description

Custom functions randomize the selection of which sample file to use and then randomize start and end points in the sample file (sample slicing).
Output of the functions is assigned to Amphibian values for sampleName:index, begin, end, period.
Amphibian variables are referenced in the @swim function.
There is a simple command to "reset" the amphibian variables, based on which sampleList you choose.
During a running @swim, reseting will change the sample slice and @swim period -- which can dramatically alter the sound.

""" 
Sample Slicer: llustrates the use of custom python functions that generate Sardine amphibian variable values. 

Instructions
1. Load Presets, Initialize, and Functions.
2. Set the amphibian variables once before starting @swim. You will see the values print out. 
3. Start the @swim function.
4. Reset amph variables and change @swim parameters at will.
5. Try adding your own sampleList -> have fun! 
"""
########## PRESETS #########################
rev0 = {'room':1.5, 'size':0.8, 'dry':0.8}
verb0 = {'verbwet':0.8, 'verbtime':0.7, 'verbgain':0.8}
del0 = {'delay':0.5, 'delaytime':0.4, 'delayfeedback':0.6}

########## Initialize ######################
from random import * 
clock.tempo=60 # assumed for period calculations

# Sample lists - fm:3 is the ~dirt.samples format. Floats values are the sample length in secs.
# Any list of samples loaded in SuperDirt will work.
sampleListFm = [["fm:3", 4.197], ["fm:4", 1.92], ["fm:7", 1.97], ["fm:9", 4.42], ["fm:14", 1.73] ]
sampleListBirds = [["birds:0", 2.0], ["birds:1", 2.0], ["birds:2", 3.0], ["birds:3", 2.5], ["birds:4", 4.0], ["birds:5", 1.0], ["birds:8", 1.75], ["birds:9", 1.75] ]
sampleListDiphone = [["diphone:0", 0.9], ["diphone:1", 0.9], ["diphone:2", 0.9], ["diphone:3", 0.9], ["diphone:4", 0.9], ["diphone:5", 0.9], ["diphone:8", 0.9], ["diphone:9", 0.9], ["diphone:10", 0.9], ["diphone:11", 0.9] ]

########## FUNCTIONS #############################
def setSampleVals(sampleDurIn, directionIn):
# generates random start and end points and calculates the period duration
   endRand = random()
   beginRand = random() * endRand
   periodDur = (endRand - beginRand) * sampleDurIn # sets period length
   if (directionIn == -1):
       return(endRand, beginRand, periodDur) # switch end and begin for reverse play
   else:
       return(beginRand, endRand, periodDur)

def genSampSlice(sampListIn, directionIn):
# random selects the sample from the sample list
   sampListIndex = randint(0, len(sampListIn)-1) # rand pick a sample from list
   sampName = sampListIn[sampListIndex][0]
   beginN, endN, periodDurT = setSampleVals(sampListIn[sampListIndex][1], directionIn)
   print(sampListIn[sampListIndex], round(beginN,3), round(endN,3), round(periodDurT,4))
   return(sampName, beginN, endN, periodDurT)

######### LIVE CODING Section  #############################
### set / reset Amphibian Variables - execute one of the Amph Variables assignment statements
# Amph Variables: V.s = sampleName:index, V.b = begin, V.e = end, V.p = period
# execute one line to initialize all amphibian variables before starting the @swim 
# execute one line while @swim is playing to reset the amph vars - this will change the sound and rhythm, often radically
# change the direction argument: 1=forward, -1=reverse

# Execute any one of these statements before and then when @swim is playing.
V.s, V.b, V.e, V.p = genSampSlice(sampleListFm, 1) # drum beats
V.s, V.b, V.e, V.p = genSampSlice(sampleListDiphone, 1) # speech 
V.s, V.b, V.e, V.p = genSampSlice(sampleListBirds, 1) # birds

V.s, V.b, V.e, V.p = ['diphone:4', 0.662, 0.902, 0.21] # hard code the amph vars

# @swim function: start play, then execute one of the lines above to change parameters.
# Uncomment / comment lines to change parameter values. Adjust clock.tempo.

@swim
def sampleSlicer(p=1, i=0):
   D('(v s)', 
   begin='(v b)', end='(v e)', **rev0, 
   #**del0, # delay preset
   speed='1 0.5 1.5',
   #freq=randint(150,400), 
   #freq='[150:270,10] [270:240,4] [240:270,4] [272:150,15]',
   pan='0 1', amp=0.9, d=1, rate=1, i=i)
   again(sampleSlicer, p=P('(v p)'), i=i+1)

clock.tempo=60
silence(sampleSlicer)

Sardine Documentation

Advanced Python - Sample Slicer

Description