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tutorial

from infsynth import *
import numpy as np

use sin, squ and saw to generate basic signal

o = sin(440) # generate 440hz sine wave
o = squ(440) # generate 440hz square wave
o = saw(440) # generate 440hz sawtooth wave

the frequency of the basic signal could be an another signal varying with time.

freq = saw(2) * 20 + 440
o = sin(freq) 

use + to mix signals

o = sin(440) + saw(440)

use >> and << to shift signal

o = sin(440) >> 1 # delay the signal 1 second

use * to modulate signal with envelope or reduce signal amplitude

env = adsr() 
o = sin(440) * env
o = o * 0.9

use lpf,hpf,lsf,hsf,bpf,bsf and pnf to get basic filter effects

# generate a bass drum loop
freq= ad([0.01, 0.1], [0.1, 0.1], T=2) * 50 + 60
bd_env = ad([0.01, 0.5], [0.4, 0.1], T=2)
bd = lpf(sin(freq)* bd_env, 100) # low-pass filter with 100hz cut-off frequency 

you can get the value of your signal any time point by calling the signal.

val = o(np.pi) # get the value of your signal on 3.1415... second

you can use any sampling rate to sample your signal as follow:

sr = 44100 # sampling rate
o = sin(440) # your signal
duration = 5 # sampling duration 
t = np.arange(0, duration, 1/sr) # Sampling time point
arr = o(t) # sampling the signal  

now! we can generate one music loop clip.

freq= ad([0.01, 0.1], [0.1, 0.1], T=2) * 50 + 60
bd_env = ad([0.01, 0.5], [0.4, 0.1], T=2)
lead_env = ad(T=2)
bd = lpf(sin(freq)* bd_env, 100) 
lead = lpf(saw(50) * lead_env, 1000) * 0.1

drum = imp(bd, '1111')
melody = imp(lead, '1010 0010 1001 0010')
song = drum + melody

play(song, 10)