Real-Time Audio Effects for .NET Applications¶

Video Capture SDK .Net Video Edit SDK .Net Media Blocks SDK .Net

VisioForge Media Framework provides over 30 audio effects for real-time audio processing in C# and .NET applications. Built on GStreamer, the cross-platform effects include equalizers, reverb, echo, dynamic compression, filters, pitch shifting, AI-based noise reduction, and more — all running on Windows, macOS, Linux, iOS, and Android.

SDKs and Platforms¶

Cross-Platform Effects¶

• SDKs: Media Blocks SDK, Video Capture SDK (VideoCaptureCoreX), Media Player SDK (MediaPlayerCoreX)
• Platforms: Windows, macOS, Linux, iOS, Android
• Namespace: VisioForge.Core.Types.X.AudioEffects

Classic DSP Effects¶

• SDKs: Video Capture SDK (VideoCaptureCore), Media Player SDK (MediaPlayerCore), Video Edit SDK (VideoEditCore)
• Platforms: Windows only
• Namespace: VisioForge.Core.DSP

DirectSound Effects¶

• SDKs: Video Capture SDK, Media Player SDK, Video Edit SDK (Classic cores)
• Platforms: Windows only
• Namespace: VisioForge.Core.Types.X._Windows.AudioEffects

For detailed parameters and properties of each effect, see Audio Effects Reference.

Effect Categories¶

Volume and Dynamics¶

• VolumeAudioEffect — Basic volume control with mute functionality
• AmplifyAudioEffect — Audio signal amplification with clipping control
• CompressorExpanderAudioEffect — Dynamic range compression and expansion
• DynamicAmplifyAudioEffect — Adaptive gain control with attack/release times

Equalization¶

• Equalizer10AudioEffect — 10-band graphic equalizer with fixed frequencies
• EqualizerParametricAudioEffect — Parametric equalizer with configurable bands
• TrebleEnhancerAudioEffect — High-frequency boost
• TrueBassAudioEffect — Low-frequency boost

Filters¶

• HighPassAudioEffect — High-pass filter for removing low frequencies
• LowPassAudioEffect — Low-pass filter for removing high frequencies
• BandPassAudioEffect — Band-pass filter for specific frequency ranges
• NotchAudioEffect — Notch filter for removing specific frequencies
• ChebyshevLimitAudioEffect — Chebyshev low/high-pass filters with sharp cutoffs
• ChebyshevBandPassRejectAudioEffect — Chebyshev band-pass/reject filters

Spatial and Stereo¶

• BalanceAudioEffect — Stereo balance control (pan left/right)
• WideStereoAudioEffect — Stereo width enhancement
• Sound3DAudioEffect — 3D spatial audio effects
• HRTFRenderAudioEffect — Head-Related Transfer Function spatial audio
• PhaseInvertAudioEffect — Phase inversion for polarity correction

Time-Based Effects¶

• EchoAudioEffect — Echo and delay effects
• RSAudioEchoAudioEffect — Enhanced echo with advanced controls
• ReverberationAudioEffect — Room reverberation (Freeverb algorithm)
• FadeAudioEffect — Fade in/out volume automation

Modulation Effects¶

• PhaserAudioEffect — Phaser effect with LFO modulation
• FlangerAudioEffect — Flanging effect with delay modulation

Pitch and Tempo¶

• PitchShiftAudioEffect — Pitch shifting without tempo change
• ScaleTempoAudioEffect — Tempo change without pitch shift

Special Effects¶

• KaraokeAudioEffect — Vocal removal for karaoke
• RemoveSilenceAudioEffect — Automatic silence detection and removal
• CsoundAudioEffect — Advanced Csound-based audio processing

Noise Reduction and Measurement¶

• AudioRNNoiseAudioEffect — AI-based noise reduction using RNN
• AudioLoudNormAudioEffect — EBU R128 loudness normalization
• EbuR128LevelAudioEffect — EBU R128 loudness measurement

Channel Management¶

• ChannelOrderAudioEffect — Channel remapping and routing
• DownMixAudioEffect — Multi-channel to stereo/mono downmixing

DirectSound Effects (Windows Only, Classic SDKs)¶

• DS Chorus — Multiple delayed and modulated copies
• DS Distortion — Audio distortion/overdrive
• DS Gargle — Gargling/tremolo modulation
• DS Reverb (I3DL2) — Professional reverb with environmental modeling
• DS Waves Reverb — Simplified reverb

GStreamer Elements¶

All cross-platform audio effects are built on top of GStreamer multimedia framework. Each effect wraps one or more GStreamer elements:

Common Usage Patterns¶

Adding Effects (Cross-Platform SDKs)¶

// Create an audio effect
var volumeEffect = new VolumeAudioEffect(1.5); // 150% volume

// VideoCaptureCoreX / MediaPlayerCoreX
core.Audio_Effects_AddOrUpdate(volumeEffect);

Combining Multiple Effects¶

Effects are processed in the order they are added:

// Create a processing chain
core.Audio_Effects_AddOrUpdate(new HighPassAudioEffect(80));           // Remove rumble
core.Audio_Effects_AddOrUpdate(new CompressorExpanderAudioEffect());   // Compress dynamics
core.Audio_Effects_AddOrUpdate(new Equalizer10AudioEffect(levels));    // EQ adjustments
core.Audio_Effects_AddOrUpdate(new ReverberationAudioEffect());        // Add reverb

Real-Time Parameter Updates¶

Most effects support real-time parameter changes:

var volumeEffect = new VolumeAudioEffect(1.0);
core.Audio_Effects_AddOrUpdate(volumeEffect);

// Later, during playback:
volumeEffect.Level = 0.5; // Reduce volume to 50%
volumeEffect.Mute = true; // Mute audio
core.Audio_Effects_AddOrUpdate(volumeEffect); // Apply changes

Media Blocks SDK Usage¶

For Media Blocks SDK pipeline-based usage with dedicated audio effect blocks, see Audio Processing and Effect Blocks.

Performance Considerations¶

• CPU Usage: Complex effects like reverberation, Csound, and multiple equalizers can be CPU-intensive
• Effect Order: Place computationally expensive effects after simpler ones to reduce processing load
• Real-Time Processing: All effects are designed for real-time audio streaming

Frequently Asked Questions¶

// 10-band EQ: all bands at 0 dB (neutral)
var eq = new Equalizer10AudioEffect(new double[] { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 });
core.Audio_Effects_AddOrUpdate(eq);

See Also¶

• Audio Effects Reference
• Audio Sample Grabber
• Audio Encoders
• Audio Processing Blocks (Media Blocks SDK)