PulseArchitect.jl

PulseArchitect.jl uis a Julia based Synthesizer, alolowing the generation and modification of audio signals from melodies and by defining process Chains. The audio is played via play without blocking the execution of further code.

Installation

Install it using

using Pkg
Pkg.add("PulseArchitect")

Usage

A quick example, first defining a melody, the wave_generator for it and then an effect Chain including the parallel execution of two effects, and finally playing the sound and saving it to disk.

using PulseArchitect

# Define a simple melody.
parallel_melody = [
    ("C4", 0.5, 1.0),
    ("E4", 0.5, 1.0),
    ("G4", 0.5, 1.0),
    ("C5", 1.0, 1.0),
    ("--", 3.0, 1.0)
]

# Generate the melody.
res_parallel = generate_melody(parallel_melody, 100;
    waveform = soft_square,
    portamento_time = 0.15,
    fs = 96000,
    decay_func = t -> exp(-2*t)
)

# Build two effect pipelines:
branch1 = AudioChain(vibrato; strength = 0.04, rate = 7.0)
branch2 = AudioChain(delay_reverb; delay_time = 0.25, feedback = 0.5, mix = 0.7)

# Create a parallel branch using the Splitter.
# Passing a vector of AudioChains creates a Splitter that processes the input in parallel.
chain = AudioChain(Splitter([0.5, 0.5], [branch1, branch2]))
push!(chain, bandpass; low_cutoff=200, high_cutoff=2500)

res = chain(res_parallel)
# Process and play the sound asynchronously.
play(res, volume = 0.5)
println("Parallel branch melody played with Splitter.")
save(res, "parallel_melody")

Authors

• Michael Schilling