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Q&A from Analog Devices EngineerZone: SigmaDSP/SigmaStudio and DSP discussions (30 topics).
30 topics · 121 messages
Filtered by: #microphone ✕
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Help with Measuring Input Volume and Setting that Volume as Output
Hello all, I recently bought an ADAU1467 Eval Board and, as a newbie to this kind of thing, am trying to get familiar with this tech and the SigmaStudio software. I am trying to make a schematic in Si
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ADAU1701 as Dynamic Mic Preamp
Good day I have a ADAU1701 board from Dayton audio. I wanted to ask if anyone here i using this a Mic preamp. Is this possible? would i need to just cascade gain blocks to get up to the 60db range? Au
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Microphone -20 dB stop
Hello, I'm looking for a block that doesn't allow a sound of -20db to pass through until it reaches -22db. I need it for a microphone because I use it for announcements and you can always hear the cli
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ADAU1467 eval and 6 I2S microphones
Dear developers, I am trying to connect 6 digital microphones to the adau1467 evaluation board. The microphones are all INMP441 on a breakout board. They are connected to SDATA, LRCLK and BCLK at IN0
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microphone noise
Adau 1467 Hello everyone, there is a function with which I can fix the rattling of the microphone. I had to turn the microphone and the music very loudly in sigma, otherwise there was hardly any music
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ADAU1787 digital mems microphone - no I2S clock
I have two questions about the ADAU1787 dev kit: I am connecting digital MEMS microphones to use as the ANC mics. It is the Infineon IM73D122V01. Unfortunately the Dmic input is not working. I cannot
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ADAU1701 ADC external resistor minimal value
Hello! I'm explaning all things but I would be glad if someone could just confirm or disprove the following third sentence ;-). I'm working on a wearable voice amplifier project for which volume and w
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Another 1787 PDM question please
I'm trying to implement a very simple setup: PDM mic inputs on the ADAU1787 eval board to an analogue output, see this project:1787 PDM TEST.dspproj Problem is it isn't working. I've read the previous
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Not able to hear output sound using NR example for ADAU1467
Hi everyone I want to use ANC feature using ADAU167 I have bought PDM mic for input. So at first I was testing with single mic and pair of headphones Here is my setup PDM mic connections CLK -> BCLK_I
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Left microphone not working with ADAU1761 headphone implementation
Dear AD team, I'm working with the ADAU1761 implementing it in a headphone design with two digital microphones (left and right). In our design implementation, the right microphone is quite close to th
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PDM microphone clock frequency settings and left, right channels data
Hi Team, Two more questions on this subject. 1) PDM microphones that are connecting to the J2 LRCLK_IN2 and J2 BCLK_IN2 pins on the EVAL-ADAU1452 board. The PDM microphones have 2.4 MHz typical freque
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One LEFT digital PDM microphone input but signal goes to both LEFT and RIGHT outputs
Hi Team, Please help. I am connecting only one digital PDM microphone to the LRCLK_IN2 and BCLK_IN2 on PDM channel 0 (with LR selection signal raised for LEFT side in my digital microphone) but the ou
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Connect microphone and headphones to ADUA1467Z
Hi! I'm having some problems with connecting my microphone and headphones to an ADAU1467Z. I'm trying to connect the microphone through input jack 1, IN1, with a TRS 3.5 mm and then the headphones are
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Dual Microphone Noise Suppression (Spectral Subtraction)
Hello Forum I want to try and setup a dual microphone system that does some sort of subtraction in order to enhance speech quality. The aim is to implement a communication system on a wearable sportsv
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Applying dynamic EQ filtering based on signal amplitude
Hi! I'm working on a project with some small size PA speakers that are intended to be used mostly for live speech (e.g. conferences) I would like to experiment with the idea of applying dynamic filter
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EVAL-Adau1787Z design error?
I was trying to use connectors J6 or J7 to connect to the digital microphone inputs on the ADAU1787 eval board. After having no success, I eventually connected the microphone to J5 which worked for me
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Digital Mic input clock domain on ADAU1452.
Hello everyone, I have a question about clock domain for digital mic input. I will use a distant microphone on a measurement system and wish to us a PDM Mic to optimise cable costs (2 pairs of "numeri
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Getting digital microphones to work on EVAL-ADAU1777Z ?
I am trying to get a digital microphone input to work on EVAL-ADAU1777Z. I have successfully brought up examples using 4 analog input channels through the ADCs. I have some digital PDM mems microphone
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What is the proper way to use the beamforming block with more than 3 microphones?
I am using the Griffith's Jim Beamforming block. I would like to use it with a linear array of 6 microphones. This post SigmaDSP Two Microphone Beamformer implies that the block can be cascaded, but I
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ADAU1761 - How would you maximize Signal-to-Noise ratio for small acoustical signals?
Hi everyone, I need to measure very low Sound Pressure Level signals (range -15 to max 30 dB(SPL)). I have designed a very good pre-amp with differential connection to the DSP ADCs, I setted the gain
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SigmaDSP ADAU17xx - Microphone signal to Loudspeaker signal loopback/feedback
Hi, I have 2 microphones and a loudspeaker included in an earpiece. I have 2 earpieces built this way ( one in each ear). When I process the microphone signal it somehow gets back in the Loudspeaker s
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Trying to set the proper registers for Dig Mic input with the ADAU1761Z eval board
I am trying to do something simple, attach a INMP421 (formerly AD's microphone) digital mic to the ADAU1761Z board. It should be simple, but I can't seem to make a correspondence between the documenta
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Is it possible to attach 4 digital mics on a ADAU1781?
Hi there, the ADAU1781 has two analog microphone inputs LMIC and RMIC which can also be used with two digital microphones, each. My question: Is it possible to use all 4 channels within the processor
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ADAU1761 setup for digital microphone
I have setup an ADAU1761 to work with a digital microphone ADMP421. The microphone input signal works fine and I can route it to the serial port or the SigmaDSP processing unit. However, I am still wo
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ADAU1761] Microphone input to I2S output
Hello, I intend to develop a microphone module with ADAU1761. When mic input is routed to I2S output, it seems like any module of included in sigmastudio is not applicable. That is, mic input is bypas