naudio/NAudio
NAudio
NAudio is a .NET audio library that provides playback, recording, format conversion, and signal processing capabilities for Windows applications. It serves as an audio format converter between common formats like WAV, MP3, AAC, and AIFF using ACM or Media Foundation codecs, and functions as an audio playback and recording API through Windows audio APIs including WaveOut, DirectSound, ASIO, and WASAPI.
The library includes an audio stream processor that can mix, trim, loop, fade, resample, and adjust pitch or channel count of audio streams with a floating-point engine. It also provides an audio signal generator for creating synthetic waveforms like sine waves with portamento effects, and a MIDI file reader and player that can parse standard MIDI files and send or receive real-time MIDI messages to external devices.
Additional capabilities include audio visualization and monitoring through waveform rendering and real-time recording level meters, device enumeration for audio input and output devices, and audio file concatenation and offset operations. The library supports both audio playback from files, URLs, and streams, as well as audio recording from input devices or system output using various Windows audio APIs.
Features
- .NET Libraries - An audio library for .NET that provides playback, recording, format conversion, and signal processing capabilities.
- Audio Mixing - Combines multiple audio streams into a single output using a 32-bit floating mixing engine.
- Audio Capture and Playback - Plays and records audio through Windows audio APIs including WaveOut, DirectSound, ASIO, and WASAPI.
- Audio Playback - Plays back audio from files, URLs, or streams using output APIs like WaveOut, DirectSound, ASIO, or WASAPI.
- General Format Conversion - Transcoding audio between common formats like WAV, MP3, AAC, and AIFF using ACM or Media Foundation codecs.
- Format Converters - Transforms audio between file formats and uncompressed forms by changing codecs, bit depth, channel count, or sample rate.
- Audio Recording - Captures audio from input devices or system output using WaveIn, WASAPI, and ASIO recording APIs.
- Audio Playback Engines - Provides audio playback engines supporting local files, URLs, and streaming via WaveOut, DirectSound, ASIO, and WASAPI.
- Audio Stream Manipulation Engines - Provides a floating-point engine for mixing, trimming, looping, fading, resampling, and pitch-shifting audio streams.
- Audio Device Enumerators - Lists all available audio output devices on the system for selection.
- Audio Trimmers - Skips a portion from the beginning or end of an audio stream and adjusts its start position.
- MIDI Event Parsers - Parses and reads individual MIDI events from a MIDI file.
- Audio Format Decoders - Decodes an MP3 file and saves the output as a WAV file.
- Audio Concatenation - Joins multiple audio files end-to-end into a single continuous audio stream.
- Audio Fades and Crossfades - Gradually increases or decreases the volume at the start or end of an audio stream.
- ASIO Playback Interfaces - Implements ASIO driver output for low-latency professional audio playback.
- Raw Audio Streamers - Interprets a raw byte array or file as an audio stream with a specified format.
- WASAPI Playback Interfaces - Provides WASAPI-based audio output for high-fidelity playback in shared or exclusive mode.
- Signal Generation - Creates synthetic audio waveforms like sine waves with optional portamento effects.
- Stream Resampling - Changes the sample rate of an audio stream to match a different output format or device.
- Time-Stretching and Pitch-Shifting - Alters the pitch of an audio stream while preserving its original playback speed.
- ASIO Recording Interfaces - Implements ASIO driver input for low-latency professional audio recording.
- System Audio Capture - Captures system audio output including audio from other applications using WASAPI loopback.
- Channel Count Converters - Changes the channel count of an audio stream from stereo to mono or mono to stereo.
- Media Foundation Encoders - Encodes audio streams into compressed formats using the Media Foundation framework.
- Audio Processing Pipelines - Chains multiple audio processing components into pipelines for playback or transformation.
- Audio Synthesis - Creates audio signals like sine waves with portamento for testing or sound synthesis.
- Waveform Oscillators - Creates a continuous sine wave tone programmatically for testing or sound synthesis.
- Synthetic Signal Generation - Creates synthetic audio waveforms like sine waves with portamento effects for testing or sound synthesis.
- MIDI File Readers - Read and write MIDI events and files to control musical instruments and music applications.
- MIDI Data Exchange - Transmits and receives real-time MIDI messages to and from external MIDI devices.
- MIDI Event Parsers - Reads individual MIDI event data from a stream or file for processing.
- MIDI File Parsers - Parsing standard MIDI files and sending or receiving real-time MIDI messages to external devices.
- MIDI File Readers - Loads and parses a standard MIDI file to access its tracks and events.
- Audio And Music - Audio and MIDI library for .NET.
- Media Processing - Comprehensive library for audio format playback and encoding.
