thanks Udo and everbody
really a great direction
I look forward to making some and hopefully we can include full support for the board in the next streambox software version.
bw grant
On 22 Apr 2020, at 07:49, udo noll un@aporee.org wrote:
Gregory O'Drobinak:
BTW, I find it disturbing that a company would not understand how their own product design worked and also leave out pertinent details.
hi Greg,
yes, that's a bit confusing indeed. but, they are friendly, responsive and open to requests and suggestions. They didn't even consider to add stereo mic-in to their boards back in 2017, since only a small group of afficionados is using that feature. ;) But they listened to our ideas and came up with these 2 reasonably priced boards. Then it turned out that both have a problem with levels when used with 2 mics in stereo. That's where this statement below comes from, i.e. the decision not to advertise the stereo mic-in feature unless... etc.
But from my test with both boards on a Pi3 (Zero soon) I can say that this difference in levels is matter of settings in Linux/alsamixer config and (at least for me) no problem. Install on a Pi is easy (no drivers) and they outperform the cirrus card (which I have too).
Disclamer: I'm not working for them ;) Just happy to have new options for crispy live stereo on a raspberry pi
bests, Udo
-Greg O. On Tuesday, April 21, 2020, 03:22:21 PM CDT, udo noll un@aporee.org wrote:
Zach Poff:
Just to be clear, how did you connect the EM172 pair?
it's a bit confusing. the codec+ board http://iqaudio.co.uk/hats/100-pi-codec.html has only one 3.5mm jack, but mine has two. got it 6 month ago from IQAudio for testing. I asked them today, and they said, that most people don't need two mics, but in case they would provide another jack on demand".
So then you would have 2 mono mic inputs, means either a Y-cable or each Primo in its own jack.
the codecZero board has one 3.5mm jack, which they say is mono, but actually is stereo. I asked, the answer was:
"I’ve not reached the end of investigation into the different volume on each channel. So we market it as mono. :-) "
And in fact, I was a bit to quick, you have to set different values in alsamixer for balanced levels on both cards.
so, what you can hear at http://radio.aporee.org:8000/live.m3u is a pi3 + codecZero, 2 Primos connected to one stereo 3.5mm jack. both channels 18dB gain, but slightly different settings in alsamixer. don't want to spam the list with amixer output...
hope I'm not contributing to the confusion ;)
bests, udo
I see that Mic2 is a mono 3.5mm jack that disables the onboard MEMS, but where is the input for Mic1?
The guide says "Supports additional (no fit) Mono Electret microphone (Mic1 right)" (p28)
-Zach
On 2020-04-21 14:57, udo noll wrote:
hi Garth:
Thanks for posting this - I have had a Pi3B running with the Cirius board for several years (maybe 4 or 5 now), but I am moving it into a solar charged enclosure so I can move it away from the power source and make it more autonomous. I have used Pi Zeros for other installation applications but was not thinking about it in this application - however due to the reduced power consumption it would make sense for me to change me entire setup to a PiZero with the IOAudio board and so I am wondering if you have any details on how you got the PiZero working for Locusonus stream
as said, I don't have Pi zero experience yet. What you've listend to is a Pi3 + the IQAUdio Zero board: http://iqaudio.co.uk/hats/101-pi-codeczero.html
this board is for the pi zero, but obviously works nicely with a Pi3 I don't have a Pi Zero yet, but will so soon, then I can test how this performs.
great news is that there is an audio board with stereo mic-in /w PIP, working with a Pi3, Pi4 and hopefully Pi Zero.
Setup on the actual Pi3 is simple, the board is recognized by the kernel (Raspbian GNU/Linux 10, Linux raspi3 4.19.97-v7+) without any driver install needed.
the card is visible by the alsa: pi@raspi3:~ $ arecord -l **** List of CAPTURE Hardware Devices **** card 0: IQaudIOCODEC [IQaudIOCODEC], device 0: IQaudIO CODEC HiFi v1.2 da7213-hifi-0 [IQaudIO CODEC HiFi v1.2 da7213-hifi-0] Subdevices: 0/1 Subdevice #0: subdevice #0
So in a darkice config you can use it like: ... device = hw:IQaudIOCODEC sampleRate = 44100 bitsPerSample = 16 channel = 2 ...
as soon as I have a pi zero I'll try the board and will report. bests, Udo
Thanks in advance
Garth
ps. The stream seems quite low gain here in the USA
On Apr 21, 2020, at 08:56, udo noll un@aporee.org wrote:
hi Grant & all locustreamers,
maybe I missed that info, but the IOAudio website says about the pi-codecZero board (for the raspberry pi zero) that it is mono and doesn't work with a pi3 etc., and didn't he mention that it doesn't have PIP / bias voltage available?
anyway, it obviously works great with a stereo pair of Primo EM172. that means this board together with pi zero would be perfectly small, stereo and has low energy consumption. I'give it a try with a pi zero soon.
I'm just listening now, it's quite low noise, better sounding than the cirrus board. quite cool. check our my backyard within the next hour: http://radio.aporee.org:8000/live.m3u
bests, Udo
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