Copyright © 2011-2018 MultiMedia Soft

SoundGenerator.SlidingWaveToneGenerate method

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Remarks

 

Generates a noise audio stream.

 

For further details about sound generation see the SoundGeneratorMan class and the How to generate wave tones, noises, DTMF tones and text to speech tutorial.

 

 

Syntax

 

[Visual Basic]

Public Function SlidingWaveToneGenerate (

nWaveType as enumSoundGenSlidingWaveTypes,

nSampleRate as Int32,

nChannels as Int32,

fFrequencyStart as Single,

fFrequencyEnd as Single,

fAmplitudeStart as Single,

fAmplitudeEnd as Single,

bLogInterpolation as bool,

nDurationMs as Int32,

nFadeInMs as Int32,

nFadeOutMs as Int32

) as enumErrorCodes


 

[C#]

public enumErrorCodes SlidingWaveToneGenerate (

enumSoundGenSlidingWaveTypes nWaveType,

Int32 nSampleRate,

Int32 nChannels,

float fFrequencyStart,

float fFrequencyEnd,

float fAmplitudeStart,

float fAmplitudeEnd,

bool bLogInterpolation,

Int32 nDurationMs,

Int32 nFadeInMs,

Int32 nFadeOutMs

);


 

[C++]

public: enumErrorCodes SlidingWaveToneGenerate (

enumSoundGenSlidingWaveTypes nWaveType,

Int32 nSampleRate,

Int32 nChannels,

float fFrequencyStart,

float fFrequencyEnd,

float fAmplitudeStart,

float fAmplitudeEnd,

bool bLogInterpolation,

Int32 nDurationMs,

Int32 nFadeInMs,

Int32 nFadeOutMs

);


 

Parameter

Description

 

 

nWaveType

Type of wave tone.

Supported values are the following:

Mnemonic Value

Value

Meaning

SOUNDGEN_SLIDING_WAVE_TYPE_SINE

0

Sine wave

SOUNDGEN_SLIDING_WAVE_TYPE_SQUARE

1

Square wave

SOUNDGEN_SLIDING_WAVE_TYPE_SAWTOOTH

2

Sawtooth wave

SOUNDGEN_SLIDING_WAVE_TYPE_SQUARE_NO_ALIAS

3

Square wave without aliasing

nSampleRate

Sample rate of the stream, e.g. 44100

nChannels

Number of channels of the audio stream.

Supported values are the following:

Value

Meaning

1

Mono audio stream

2

Stereo audio stream

4

3.1 audio stream

6

5.1 audio stream

8

7.1 audio stream

fFrequencyStart

Initial wave tone frequency expressed in Hertz, e.g. 700

fFrequencyEnd

Final wave tone frequency expressed in Hertz, e.g. 1000

fAmplitudeStart

Initial wave tone amplitude.

- value 0.0 means that sound volume is muted

- values higher than 0.0 and smaller than 1.0 attenuates the sound volume

- value 1.0 sets the sound at full volume

- values higher than 1.0 amplifies the sound volume

fAmplitudeEnd

Final wave tone amplitude.

- value 0.0 means that sound volume is muted

- values higher than 0.0 and smaller than 1.0 attenuate the sound volume

- value 1.0 sets the sound at full volume

- values higher than 1.0 amplify the sound volume

bLogInterpolation

Boolean value indicating if the sliding should use linear or logarithmic interpolation.

Supported values are the following:

Mnemonic Value

Meaning

false

Uses linear interpolation

true

Uses logarithmic interpolation

nDurationMs

Duration of the wave tone expressed in milliseconds.

nFadeInMs

Duration of the fade-in at the beginning of the wave tone expressed in milliseconds. Set this value to 0 if you don't need to apply a fade-in at the beginning of the audio stream.

nFadeOutMs

Duration of the fade-out at the end of the wave tone expressed in milliseconds. Set this value to 0 if you don't need to apply a fade-out at the end of the audio stream.

 

 

Return value

 

Value

Meaning

 

 

Negative value

An error occurred (see the LastError property for further error details)

enumErrorCodes.NOERROR (0)

The method call was successful.