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This version (10 Feb 2021 12:46) was approved by Sanjeeva Reddy.
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Table of Contents
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Cross Fade
Description
The Cross Fade block creates a smooth transition between two input signals. The volume of one signal is decreased while the other input signal level increases, creating a gradual switch (cross-fade) between the inputs.
Usage
The output signal is selected by setting a value on the input control pin (top orange pin) to the desired input's index, between 0.0 and 1.0. 0.0 selects the lower input pin2, 1.0 selects the upper input pin1, and 0.5 mixes 0.5 times pin1 with 0.5 times pin2, etc.
When the control input value changes, a crossfade is initiated between the current output and the newly selected input signal. The cross-fade transition rate (slew rate) can be adjusted using the numerical control on the block, (the maximum SW Slew Rate value is 23, which is a very slow fade).
Targets Supported
| Name | ADSP-214xx(Sample) | ADSP-214xx(Block) | ADSP-215xx/ADSP-SC5xx(Sample) | ADSP-215xx/ADSP-SC5xx(Block) |
|---|---|---|---|---|
| Cross Fade | No | Yes | No | Yes |
Pins
Input
| Name | Type | Description |
|---|---|---|
| SourceSelect | Control | Controls the transition of data |
| Input0 | Audio | Input channel 0 |
| Input1 | Audio | Input channel 1 |
Output
| Name | Type | Description |
|---|---|---|
| Output0 | Control | Output channel 0 |
Configurable Parameters
| GUI Parameter Name | Default Value | Range | Function Description |
|---|---|---|---|
| Step | 12 | 1 to 23 | Step size for transition from one input to other input |
| NumChannels | 2 | 20 | Number of input and output channels. Change in this value requires re-compilation |
DSP Parameters
| Parameter Name | Description | ADSP-214xx/SC5xx/215xx |
|---|---|---|
| step | scaling of the inputs | Float |
DSP Parameter Computation
step = 2^(-1/step)
/srv/wiki.analog.com/data/pages/resources/tools-software/sigmastudiov2/modules/muxesanddemuxes/crossfade.txt · Last modified: 05 Apr 2021 15:16 by John Joseph