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Q&A from Analog Devices EngineerZone: SigmaDSP/SigmaStudio and DSP discussions (18 topics).
18 topics · 101 messages
Filtered by: #rms ✕
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SigmaDSP Standard RMS Compressor Algorithm Reference
Currently using the standard independent RMS module to implement Dynamic Range Compressor/Limiter Now, I will describe the specific situation in detail The transfer function of the current compressor
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Computing RMS values
I am curious about my measuring methods and interpretation, and wanted to get feedback on what I'm doing. I'm attaching an illustration of a small project. It takes either a DC value or a sine tone as
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LKFS Metering
I am looking into if it is possible to implement stereo LKFS Metering (or a close approximation of) in SigmaDSP. Here is the standard: https://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.1770-3-20120
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ADAU1761 - RMS Table RMS TC and Decay do not correspond when set to the same rate
I expect the output graph to look like the one at the bottom in the image, however, the result is asymmetrical like in the top graph in the image. Am I understanding the RMS Table settings incorrectly
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''Discrete'' RMS Table block for specific needs/settings (IEC 61672 fast and slow time weighting)
Hi All, I need the functionality of the RMS table block (Level Detectors/Lookup Tables > RMS Table > Range (-93 to +3 dB) > RMS Table), but for my application the available dB/s range and precision is
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adau 1772
Hello everyone! we are currently designing a new product, based on ADAU 1772 audio processor. We need to measure RMS value of the signal for at least 0.05s. We trued the Single Level Detector (SigmaSt
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I have a Question about Limiter Release Time in Sigma Studio
Hi everyone, I use a board with ADAU1452 dsp. I wants to control the Attack Time and Release Time in Limiter. but I don't know How to get Attack Time and Release Time . Can you answer my question? Ple
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sigma studio rms table
Hi all How do I calculate the value of the RMS TC (attack) and the Decay value in real time? what is the formola requiered . And what are the last 2 values in the RMS table data structure how do I cal
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adau1701 internal peak and rms levels wrong!
I am using the circuit blocks RTA thats supposed to show level in db and PEAKENV in conjunction with READBACK to display the HEX of the peak value. I have calibrated the input level such that the RMS
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RMS compression curve vs PARAM file values
Hello all, I am using AD ADAU1452 DSP in multimedia system and need to control the compression curve of the RMS limiter while the system is running (accessing the registers of the DSP via SPI). I am u
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Auto-select the mux input with signal (help)?
There maybe something on this already in this forum, if so I apologies for the repeat but I couldn't find it. My application is this: I have two stereo analog inputs that run into an indexed multiplex
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A Poor Engineer's Distortion Analyzer
Yes, there are poor engineers. Where I work audio is a sideline, so we do not yet have a dedicated distortion analyzer. I've been toying with buying a used one on eBay, but it's interesting to see wha
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ADAU1442 - Vrms input measurement
Hi Srs., It's my first post here and I’m working with adau1442 dsp to develop a sound level meter with frequency analyzer. I know making a frequency analyzer in sigmastudio, but I don't know how to re
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RMS Table range
Hello, I'm experiencing some unexpected results from a RMS Table block inside a Sigma (3.1) DSP project for 1701. What is the table output for signals exceeding +6dB RMS amplitude? Is it the clipped t
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Bug in Peak and RMS Compressor?!
Hello, in my recent project I would like to use those Peak- and RMS- compressors with its nice user interface. Unfortunately these two blocks seem to have bugs. Or I am missing something. 1. Standard
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Typical values for RMS Time Constant, Decay Constant in Speech applications
Hello, In several SigmaStudio Algorithms, time constant parameters like RMS TC, Decay are used to set attack / release / hold times for audio signal processing. 1) When dealing with human speech input
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Calculating the difference (in decibels) between the RMS levels of two signals
Comparing the linear level of two signals is fairly simple in SigmaStudio. You can basically calculate the envelope of each signal (using peak, MS, or running average), and then subtract the two outpu
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ADAU1761 RMS detector problem
Hello, I have found what I believe is an issue with the RMS Table. It works as expected until it's input level drops below ~-75dBFS. Below this level the table appears to wrap and does not produce the