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by Composit
Wed Feb 15, 2017 9:08 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Add an I2S mic using device tree & simple-audio-card
Replies: 36
Views: 24913

Re: Add an I2S mic using device tree & simple-audio-card

I agree. This seems to be the right approach. But as you surely noticed - I'm absolutely not familiar with overlay code and there is not much documentation for it. Would be awesome combining mic (ICS43432) and dac (max98357 or something similar) in the simple audio card overlay. I look forward to he...
by Composit
Wed Feb 15, 2017 8:04 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Add an I2S mic using device tree & simple-audio-card
Replies: 36
Views: 24913

Re: Add an I2S mic using device tree & simple-audio-card

The project is about an intercom solution. So record and playback should be on simoultaneously. I can load both dtoverlays - looks like this: [email protected]:~ $ sudo dtoverlay -l Overlays (in load order): 0: i2s-soundcard alsaname=mems-mic 1: hifiberry-dac But there is always just one entry in /proc...
by Composit
Tue Feb 14, 2017 7:22 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Add an I2S mic using device tree & simple-audio-card
Replies: 36
Views: 24913

Re: Add an I2S mic using device tree & simple-audio-card

Yeah, I get those too but it all works :roll: To create the soft mixer for volume control I used plugh's work , adding the mapping from left to both channels (I've grounded the L/R pin, configuring it as left) so that sound comes out of both speakers. Edit the alsa config: cd ~ nano .asoundrc & add...
by Composit
Sun Feb 05, 2017 5:57 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Add an I2S mic using device tree & simple-audio-card
Replies: 36
Views: 24913

Re: Add an I2S mic using device tree & simple-audio-card

Great "how to" - thanks. After the following command I got warnigs: [email protected]:~/ics43432# dtc [email protected] -I dts -O dtb -o i2s-soundcard.dtbo i2s-soundcard-overlay.dts Warning (unit_address_vs_reg): Node /[email protected] has a unit name, but no reg property Warning (unit_address_vs_reg): Node /[email protected] h...
by Composit
Sun Feb 05, 2017 2:40 pm
Forum: General discussion
Topic: Stereo sound recording, mic separation question.
Replies: 16
Views: 2987

Re: Stereo sound recording, mic separation question.

Thanks for clarification. It looks as if my ICS-43432 will arrive next week. Prepared myself following this instructions: https://github.com/nejohnson2/rpi-i2s So far so good with the little problem that the description is for RPi 3. @gregeric Since I'm no expert on Kernel-Stuff I look forward to he...
by Composit
Fri Feb 03, 2017 4:00 pm
Forum: General discussion
Topic: Stereo sound recording, mic separation question.
Replies: 16
Views: 2987

Re: Stereo sound recording, mic separation question.

@gregeric would you mind sharing some details on how you connected the single MEMS microphone to Zero's i2s if ? The model of the microphone and how you got it to work with the Zero ? For my little intercom project mono is sufficient ;) Would it work with this MEMS micro from adafruit (SPW2430) ? ht...

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