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nanoalsa's Introduction

NanoALSA

Date: 2019-01-10

This library is under development. Do not expect any stability. The API (Application Programming Interface) may change at any time.

Simple, small, user space, file descriptor based library for Pulse Code Modulation (PCM) interface of the Linux kernel sound subsystem (Advanced Linux Sound Architecture, or simply ALSA).

I.e. A simple library to record and play sound on Linux.

I.e. A smaller TinyALSA.

For a more complete library, yet simple, see tinyalsa. For the standard ALSA library, see alsa-lib.

TinyALSA: https://github.com/tinyalsa/tinyalsa

alsa-lib: http://git.alsa-project.org/?p=alsa-lib.git

What is PCM?

PCM stands for Pulse Code Modulation, which is a digital representation of a wave where amplitude is converted to a number at regular intervals:

 3|                                o
 2|  sample                   o         o
 1|   /
 0|  o                   o                   o
-1|
-2|       o         o
-3|            o
     |    |    |    |    |    |    |    |    |

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