Class Oversampler

Namespace

NAudio.Dsp

Assembly

NAudio.Core.dll

Integer-factor (1×, 2× or 4×) oversampler for a single channel. Zero-stuffs and low-pass filters on the way up, low-pass filters and decimates on the way down, so a non-linear stage (saturation, clipping) can run at a higher rate where the alias products it generates fall above the original Nyquist and are filtered out. A factor of 1 is a transparent pass-through.

public sealed class Oversampler

Inheritance

object

Oversampler

Inherited Members

object.Equals(object)

object.Equals(object, object)

object.GetHashCode()

object.GetType()

object.ReferenceEquals(object, object)

object.ToString()

Constructors

Oversampler(int, int)

Creates an oversampler.

public Oversampler(int factor, int sampleRate)

Parameters

factor int

Oversampling factor: 1, 2 or 4.

sampleRate int

The (base) sample rate in Hz.

Properties

Factor

The oversampling factor.

public int Factor { get; }

Property Value

int

Methods

Downsample(ReadOnlySpan<float>)

Low-pass filters the high-rate samples and returns the single decimated output sample. source must be exactly Factor long.

public float Downsample(ReadOnlySpan<float> source)

Parameters

source ReadOnlySpan<float>

Returns

float

Reset()

Clears the anti-alias filter state.

public void Reset()

Upsample(float, Span<float>)

Upsamples one input sample into destination, which must be at least Factor long.

public void Upsample(float input, Span<float> destination)

Parameters

input float

destination Span<float>