This version (18 May 2021 08:59) was approved by Sreesha Y M.
Table of Contents
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RMS Index Selectable
Description
This block uses an rms dynamics processor that lets you control the rms TC (time constant) and Soft Knee behavior, and opens the compression curve graph for your curve drawing.
RMS works on a longer average than peak processors, thus allowing some fast loud transients to pass without compression, but operating more on longer segments that exceed the threshold.
This module has stage growth and each stage can have its own compression ratio set using the compressor plot individually. The index selection pin selects the desired stage to be used on the target.
Targets Supported
| Name | ADSP-214xx | ADSP-215xx/SC5xx | ADAU145x/146x |
|---|---|---|---|
| ——————————————————-- | —————————- | ——————————-- | —————————- |
| RMS Index Selectable | NA | B | NA |
Pins
Input
| Name | Type | Description |
|---|---|---|
| ————————————— | —————————— | ———————————————— |
| IndexInput | Control | Index Selection Input |
| Input0 | Audio | Input channel1 |
| ExtDetectInput | Control | Ext Detector Input |
Output
| Name | Type | Description |
|---|---|---|
| ————————————— | —————————— | ———————————————— |
| Output0 | Audio | Output channel1 |
Configurable Parameters
| GUI Parameter Name | Default Value | Range | Function Description |
|---|---|---|---|
| ———————————————- | —————————- | ————————————- | —————————————————————- |
| Hold_StageX | 0 ms | 0 to 2000 ms | Controls the time (in ms) the compressor maintains its current output gain setting before it starts decreasing as the input level decrease. |
| Decay_StageX | 10 dB/s | 0 to 10000 dB/s | Controls the rate at which the compressor gain decreases in response to decrease in the input signal level, e.g. the “Release” time. |
| SoftKnee_StageX | False | True/False | Soft-knee lets the compressor ease into action, making a less-abrupt change from unprocessed signal to compressed signal. If it is not activated, the default is hard-knee behavior, in which compression rate reduces or increases abruptly with the threshold level |
| Table | All values are 1 by default | - | Table values are the output to input gain level points |
| IsDBps_StageX | True | True/False | Enable /Disable the Control Decay to be either in dB or linear scale |
| NumChannels | 1 | 1 to 20 | Number of input and/or output channels. Change in this value requires re-compilation |
| NumStages | 1 | 1 to 10 | Number of Stages of Compressor. Change in this value requires re-compilation |
Note : _StageX - Refers to parameters of each stage. X represents the stage index.
DSP Parameters
| Parameter Name | Description | ADSP-214xx/SC5xx/215xx | ADAU145x/146x |
|---|---|---|---|
| ———————————— | —————————————— | ——————————————- | ———————————————- |
| Hold_StageX | Hold value | Float | 8.24 format |
| Decay_StageX | Decay value | Float | 8.24 format |
| Table_StageX | Table values | Float | 8.24 format |
| TimeConstant_StageX | Time Constant | Float | 8.24 format |
Note : _StageX indicates the dsp parameters associated with a particular stage. X represents the stage index
DSP Parameter Computation
Decay = (20000/Decay)/(FS + 0.0000001) (When Decay is in dBps) or Decay/(FS + 0.0000001) (When Decay is in linear)
Hold = FS * Hold/1000
Where FS is the sampling rate
resources/tools-software/sigmastudiov2/modules/dynamicsprocessors/rmsindexselectable.txt · Last modified: 12 May 2021 09:36 by John Joseph