Questions tagged [i2s]
For questions regarding the I2S serial bus interface standard for connecting digital audio devices.
45
questions
0
votes
1answer
21 views
PCM1808 I2S arecord gets1153x too much data
I have a stock Pi 3B with all Raspbian updates. From various sources I've tried to cobble together alsa recording from an inexpensive PCM1808 device at 8K 24 bit stereo. To do this, I've used the ...
0
votes
0answers
13 views
Cannot capture screen with i2s audio - help needed
First time here and new to RPi.
I have set up an SPH0645 i2s mic and can record and playback using Audacity without a problem.
I am trying to screen capture and have tried Vokoscreen, recordmyscreen ...
0
votes
0answers
30 views
Stop and Start I2S in Raspberry Pi 4
Is there any way to stop and start the I2S block of Raspberry Pi without rebooting? or any power-down mechanism?
I need to make sure that NO clock pulse is coming out of LRCLK and BCLK until we start ...
0
votes
0answers
22 views
preempt_rt audio
I patched my pi4 with preempt_rt in an attempt to reduce xruns. Now arecord -l no longer lists my i2s mems microphone. I also tried a few other usb microphones and they don't show up either. The ...
0
votes
0answers
58 views
Raspberry Pi I2S duplex audio setup
I'm using a Raspberry pi 2b+ for an audio project where I need stereo in and out at the same time.
I've had success with cheap USB interfaces but they have a lot of noise and are prone to dropouts.
My ...
0
votes
0answers
60 views
How do i use I2S on MEMS-Mics using C++?
I might as well have seen every forum post about this topic with no luck...
It should be simple: I just want to get two ivensense ICS43432-MEMS-mics feeding samples into the raspberry pi 4 using c++, ...
0
votes
0answers
83 views
Raspberry Pi Looking to control I2S DAC via C++
Hello stack exchange community!
I have a project underway in which I am planning to produce sine wave audio output using a Pi 3B and a PCM 1780 DAC. I'm in the very early stages and am trying to ...
2
votes
0answers
49 views
I2S MEMS Microphone pop sound at the beginning of the recording
I am using Adafruit I2S MEMS Microphone in Raspberry Pi 4 running raspbian buster. I installed it successfully following adafruit guide. It is working well for recording using arecord.
However, every ...
0
votes
2answers
167 views
Slow audio playback with PCM5102A I2S DAC
I'm using the same PCM5102A DAC board on a Pi B Rev2 as in this blog post with software configured as per this post, connected in the same way. The audio playback is slow but otherwise of good quality....
0
votes
0answers
122 views
raspberry pi zero I2S record and playback
I am following this answer to enable both audio record and playback on RPI zero.
My question is: dose the files ~/.asoundrc and /etc/asound.conf conflict each other?
Sorry, I should just comment ...
1
vote
0answers
35 views
If I want to program I2S by bit-setting the PCM registers manually, do I need to disable any kernel settings (eg snd_bcm2835)?
(I'm not with my board at the moment - if I need to share my code, I'll have to edit this post or post a new one at a later time)
I didn't realize how complicated I2S setup on the Pi is.
I've been ...
1
vote
1answer
49 views
Start a pyhton script, which depends on I2S as soon as possible during the startup of my Raspberrypi
I have the following systemd service, which starts a systemd service as soon as I boot my raspberrypi:
[Unit]
Description=MyService
DefaultDependencies=false
[Service]
Environment=SERVICE_HOME=/home/...
1
vote
1answer
657 views
Installation of kernel module for I2S Mic fails
I have a I2S mems microphone from adafruit. Now I am following the guide at https://github.com/nejohnson2/rpi-i2s#compile-the-i2s-module
Now after I have mounted the debugfs I attempt to look for the ...
1
vote
1answer
75 views
I2S 3W Class D Amplifier and 2.2“ SPI-Display (ILI9341) - GPIO 18 Problem
I want to connect the Adafruit I2S 3W Class D Amplifier Breakout Board and an 2.2" TFT Display (ILI9341) to a Raspberry Pi Zero.
However, it seems that by default both components use the GPIO 18 (the ...
0
votes
1answer
2k views
Toslink input for Raspberry Pi
I am looking for optical Toslink input for Raspberry pi (any model). If I just connect a DLR-1140 receiver to PCM_DIN, would that work?
My goal is to build a sound server. I have a TV that outputs ...
0
votes
3answers
519 views
I2S data stream format
While I'm working with RPi I2S and couple of DACs, I notice something which I like to verify in here.
When I connect the scope to I2S interface I usually see waveforms similar to this:
In here 1st ...
1
vote
0answers
142 views
Error in configuration for I2S microphone
I follow these directions to set up the Raspberry Pi for an Adafruit I2S microphone. The line to compile the module fails with a missing script:
$ make -C /lib/modules/$(uname -r )/build M=$(pwd) ...
0
votes
0answers
525 views
How to force compilation of kernel with rpi-source for I2S microphone
I followed these directions to configure the Raspberry Pi for the Adafruit I2S microphone. I skipped the step that installed git bc libncurses5-dev bison flex libssl-dev and got this error when ...
0
votes
0answers
247 views
Simple Sound Card with I2S - how do I switch frequencies?
I asked this a month ago, but didn't get an answer and so the thread was auto-deleted. It is becoming critical that this be solved, so I am reposting.
I have the simple sound card working with a ...
1
vote
0answers
28 views
Send 24/96 pcm music from an rpi3b+ to a zero one
As my title says, I'd like to send audio from an rpi3b+ to another one.
Preferably a zero one via a GPIO connection.
My target is to have a dedicated device to only manage an USB DAC.
Ideally an Rpi ...
0
votes
1answer
232 views
Need a board that have two I2S interfaces
I want to try to make a prototype of hardware audio DSP module, so I need both audio input and output. RPi 3B only has one, and the quality is poor, so I'd better to connect audio IO by myself. ...
2
votes
1answer
9k views
I2S Recording combined with I2S Playback
I have a Raspberry Pi Zero and I am using the Adafruit I2S MEMS Microphone together with the ADAFRUIT I2S 3W CLASS D AMPLIFIER BREAKOUT - MAX98357A.
I did follow the two respective tutorials and I ...
3
votes
1answer
7k views
How do I increase the input volume of a microphone connected to pi .Its using the I2S interface
So i have managed to get input from a microphone using I2S interface following this link .
https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout/raspberry-pi-wiring-and-test
if i use the ...
2
votes
0answers
1k views
Both speaker and microphone via I2S
I got the exact same error as someone asked on the raspberry pi forums. But no solution was found yet. https://www.raspberrypi.org/forums/viewtopic.php?t=183617
I've connected max98357-i2s to the ...
0
votes
0answers
260 views
PocketSphinx , Adafruit i2s Mems Microphone and RPI
I am using Adafruit i2s Mems Microphone on Raspberry pi3 and PocketSphinx for the Speech to text conversion project. I am able to record audio on AUDACITY and Alsa. Previously i tried Google speech ...
0
votes
1answer
438 views
Kernel modules and Pi board versions
I have a Raspbian image (4.9.59-v7) into which I am loading a kernel module that I have built myself since it is not in the default image (for an ICS43432 MEMS I2S microphone).
I have this working ...
8
votes
1answer
35k views
Confirming the I2S pins on Raspberry Pi 3 model B?
I'm having trouble confirming what are the pins used for I2S on Raspberry Pi 3 model B.
First of all, I²S - Wikipedia tells me that in I2S, I'm looking for bit clock (BCLK), word/left-right clock (...
0
votes
1answer
2k views
How can I configure LibreELEC to work with a PIFI DAC+ v2.0 HiFi board?
The PIFI DAC+ board is mounted on a RPi 3, but when trying to configure the audio output device in LibreELEC, I cannot see an option to select the I2S DAC board.
2
votes
2answers
1k views
Full duplex audio over i2s (Adafruit MEMS + DAC)
I have setup a pi-zero with digital mems mics from Adafruit, and also the digital DAC. I can use arecord to record stereo audio, and then aplay to playback the audio over the DAC. Interestingly, the ...
4
votes
4answers
32k views
How to make PCM5102 DAC work on Raspberry Pi ZeroW?
I purchased a PCM5102 for my PiZeroW, but having problems finding
complete driver software information
voltage information
wiring information.
I chose this particular unit because they seemed very ...
1
vote
0answers
1k views
CODEC I2S: Using SGTL5000 in a custom board
I am using this board and this works:
https://fe-pi.com/products/fe-pi-audio-z-v2
Now, I wanted to integrate an SGTL5000 (the above board's CODEC) in a custom board. I designed it and I already have ...
1
vote
1answer
773 views
Recording audio using i2s mic results to pure noise when interfaced with Raspberry PI 3 (both I2S mic and I2S speaker)
I followed Adafruit's guide for setting up the I2S mic with raspberry pi 3 loaded with precompiled image of Raspbian Jessie for the 3.5in PiTFT.
Also, I'm using another I2S device which is the ...
9
votes
5answers
7k views
I2S DAC device support (kernel drivers?) and noise ("pop", "crackle") on playback
I am trying a Adafruit I2S 3W Stereo Speaker Bonnet for Raspberry Pi - Mini Kit, which is built around two MAX98357 (datasheet: adafruit, maxim), on a Raspberry Pi Zero W with Raspbian Stretch (...
1
vote
0answers
683 views
Raspberry pi voice encryption over GSM
I'm not expert in RPI, so I need help to make a voice encryption model for calls over GSM. I have lot of questions.
So I want to use raspberry pi 3 and Sim900l for GSM.
I will need a microphone for ...
1
vote
1answer
533 views
I2S Connections - MEMS Digital Microphone, CODEC, and Raspberry Pi Zero W
I have a MEMS Digital Microphone with PDM output. I am planning to use this:
http://www.st.com/content/ccc/resource/technical/document/datasheet/57/af/88/31/7b/59/4f/77/DM00111225.pdf/files/...
1
vote
0answers
212 views
Use SPI to clock sensor and stream data using DMA
I'm looking into a issue on a Pi with SPI port, to clock continuously and stream data to memory area using a DMA.
The sensor I connected on SPI on a Raspberry Pi 3, should be clocked with more than ...
0
votes
1answer
4k views
Help reading audio data from I2S microphones
Using the Adafruit I2S MEMS microphone breakout board and the Raspberry Pi 2B, I am trying to read in stereo input using PyAudio and pass the data through a FFT to analyse. However I am not able to ...
4
votes
0answers
317 views
I2s DAC audio out but USB audio in
I was wondering if anyone could help me.
I am trying to set up my Pi 3 to be an assistant (Google or Alexa, etc). I had it set up working fine with the USB mic and the 3.5mm audio out, but I wanted ...
1
vote
0answers
709 views
How to connect SSM2603 via I2C/I2S?
I'm trying to get the Audio Codec SSM2603 (as input device) to work with a RaspberryPI 3 running Raspbian. Im using a SSM2603-EVALZ.
I compiled and installed the most recent kernel with SSM2603 ...
0
votes
1answer
1k views
How to route audio from a USB sound card to I2S on RPi?
So for a school project I need to be able to route audio from a USB sound card to I2S. More specifically, the I2S will be connected to an XMOS xCore-200 Multichannel Audio Platform. I need to write a ...
2
votes
1answer
10k views
How to output all audio on the I2S interface and audiojack by default?
I'm currently running Raspbian on a Raspberry Pi 3.
I want to output all the audio that would normally go to the audio jack output also go to the I2S interface (on GPIO pins 12 BCK, 35 LRCK, 40 DOUT). ...
2
votes
0answers
652 views
How to Set Up Driver Support for I2S Audio Codec
I am building a I2S audio codec using an ADAU1781 chip, which will communicate with the Pi via the GPIO pins. In my research I have found that there is an ASoC driver built into the Raspberry Pi ...
3
votes
0answers
2k views
Which GPIO pins are used for I2S audio I/O
I am trying to set up the ADAU1781 as an audio codec for the Pi 3 B, communicating with the Pi via the GPIO pins. Which pins would I use for I2S audio input and output? I have been doing a lot of ...
2
votes
1answer
4k views
I2S microphones on Pi 2 and 3?
I'm trying to get a pair of I2S microphones working on a Pi2/Pi3. FWIW, it's a pair of http://www.invensense.com/wp-content/uploads/2015/02/ICS-43432_DS.pdf.
Here is some relevant output:
$ uname -a
...
3
votes
0answers
932 views
Using I2S microphone with Raspberry Pi [closed]
I have a microphone with I2S output and I am trying to record audio with it, using the Raspberry Pi (2 model B). I'm having trouble getting the microphone to work.
Does anyone have working code for it?...
