This version (18 May 2021 08:59) was approved by John Joseph.The Previously approved version (27 Feb 2020 05:44) is available.
Table of Contents
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Signal Envelope
Description
The Signal Envelope block measures the rms average value of the input signals.Holds the signal level for time specified in Hold Control(ms) before starting increase/decrease the output signal level,when there is a change in input signal level.
Targets Supported
| Name | ADSP-214xx | ADSP-215xx/SC5xx | ADAU145x/146x |
|---|---|---|---|
| ——————————————— | —————————- | ——————————-- | —————————- |
| Signal Envelope | B/S | B/S | B/S |
Pins
Input
| Name | Type | Description |
|---|---|---|
| ————————————— | —————————— | ———————————————— |
| Input | Audio | Input channel |
Output
| Name | Type | Description |
|---|---|---|
| ————————————— | —————————— | ———————————————— |
| Output | Audio | Output channel |
Configurable Parameters
| GUI Parameter Name | Default Value | Range | Function Description |
|---|---|---|---|
| ———————————————- | —————————- | ————————————- | —————————————————————- |
| RmsTC | 120 | 1 to 10000 | Controls the time constant (TC) in dB/second that is used for calculating the RMS input value. The time constant determines how rapidly the compressor will respond to input signal level changes, e.g. the “Attack” time. |
| Hold | 0 | 0 to 2000 | Controls the time (ms)the envelope maintains the output level before it starts decreasing as the input level decreases |
| Decay(NA for Ext Decay) | 10 | 1 to 10000 | Controls the rate at which envelope signal decreases in response to the decrease in the input signal |
DSP Parameters
| Parameter Name | Description | ADSP-214xx/SC5xx/215xx | ADAU145x/146x |
|---|---|---|---|
| ———————— | ————————————————————————————- | ——————————————- | ———————————————- |
| RmsTC | Controls the time constant (TC) in dB/second that is used for calculating the RMS input value. | Float | 8.24 format |
| Hold | Controls the time (ms)the envelope maintains the output level before it starts decreasing as the input level decreases | Float | 8.24 format |
| Decay | Controls the rate at which envelope signal decreases in response to the decrease in the input signal | Float | 8.24 format |
DSP Parameter Computation
RmsTC = Abs(1 - 10^(RmsTC/(10 * Sampling Rate)
Hold = (int) Sampling Rate * Hold/1000
Decay = 1/10^(Decay * 2 /(10 * Sampling Rate))
resources/tools-software/sigmastudiov2/modules/dynamicsprocessors/signalenvelope.txt · Last modified: 12 May 2021 09:37 by John Joseph