For time-delayed audio, we need to create what's called a "circular buffer" or a "ring buffer", an array of samples to which we record continuously in a loop, and which we can then use always to access the most recently recorded sound from the past.
This patch shows the lookup tables (a.k.a. transfer functions) being used on three formal levels: 1) the microscopic level, to determine the timbre of the waveform, 2) the note level, to determine the amplitude (and timbre) envelope, and 3) at the phrase level, to control the amplitude over a 15-second time span.
First, turn on audio (below), then start the tempo object.
This patch demonstrates a few different ways of reading audio from buffer~.
The buffer~ object can hold any audio data—or, for that matter, any collection of floating-point numbers. Most often it's used for audio playback, but it can also store a curve of any desired shape, to be used as a control signal. In this example, it will be used to store a control signal that will influence the pitch of an oscillator. The replace message to buffer~ will load in data from a sound file.
To play short grains of sound, especially ones randomly chosen from a sound file, it's usually necessary to impose some sort of "window"—an amplitude envelope—to taper the ends of the grain in order to avoid clicks. This patch shows how to generate four types of window function, and read through them with a phasor.
This patch demonstrates a method of storing and recalling sound in RAM using the buffer~ object and the various objects that can access a buffer.
This patch demonstrates a method of storing and recalling sound in RAM using the buffer~ object and the various objects that can access a buffer.
To avoid an initial spike on the sync output of a groove~ object, make sure that its associated buffer~ is given a nonzero size.
This patch demonstrates the technique of wavetable synthesis: using one cycle of a stored waveform as the wave type for a synthesizer tone. The cycle~ object with no argument produces a cosine wave; however, cycle~ can also refer to a waveform stored in a buffer~, and use that as a wavetable. To do that, you need to create a buffer~, store a waveform in it, and then refer to that buffer~ by creating a cycle~ with the same name.
Use the timer object to measure the time between when you turn on recording and when you stop recording.