Hi Miloš
I wish this had a one-line answer!
If your microphones take 48V Phantom power, then you can use a range of USB soundcards with the Pi. At SC we use a lot the Focurite 2i2 2nd Gen, which is discontinued, available quite cheaply, and has great preamps.
(Note that the newer 2i2 3rd Generation, which a really nice little preamp imo, requires a manual button press to activate Phantom power on boot, which makes it effectively useless for remote streaming applications.)
Locus Sonus favor a similar soundcard. You can find many details on Grégoire Lauvin's streambox design eg here: http://locusonus.org/wiki/index.php?page=Electret+mics.en
You can modify a pair of Primo EM-172 or EM-272 electret capsules to work with 48V Phantom power by following the build notes here: https://paper.dropbox.com/doc/Streambox-with-Focusrite-Soundcard-y6K4xLUHuP3... This approach is the simplest mod possible and gives us very good results. Eg you can hear it in the south-walney stream, which has just returned to the map.. http://locus.creacast.com:9001/south_walney.mp3
Grégoire has a more refined, and more complicated circuit, as described above.
You can also buy microphones based on the Primo and modified for 48V bias voltage from micboosters: https://micbooster.com/10-clippy-microphones They are good but quite expensive.
We are still looking for a really good and affordable interface between the Pi and the microphones.. we'd better make one..
Thanks very much
b g
On 9 Apr 2020, at 11:36, miloš vojtěchovský zvukac@centrum.cz wrote:
hi Grant,
any recommendation for a preamp for stereo capsule microphones? which is small and powered by Rapsb PI?
thanks
Milos
Od: "peter cusack" <pbcusack@gmail.com mailto:pbcusack@gmail.com> Komu: zvukac@centrum.cz mailto:zvukac@centrum.cz, locustream@locusonus.org mailto:locustream@locusonus.org Datum: 09.04.2020 12:20 Předmět: Re: [locustream] Streaming refresher for Reveil 2-3 May 2020
hi Grant,
Greetings from blue and sunny Berlin. I hope all is very well.
The workshop is a great idea. I’d certainly like to join in.
I’ve been thinking of setting up Raspberry pi streaming for a while and with time on my hands this seems a good moment.
Which of the R.pi versions available do you recommend? I probably wouldn't use it for anything but the streaming.
All wishes Stay well Peter
On 9 Apr 2020, at 11:06, Grant Smith grant_smith@mac.com wrote:
Hi all
We re going to run a 1 hour streaming workshop <https://paper.dropbox.com/doc/Reveil-Streaming-Workshop--AxqCt2s0yEGO3R9eDtx... https://paper.dropbox.com/doc/Reveil-Streaming-Workshop--AxqCt2s0yEGO3R9eDtxwEo~TAg-28Qfo0CKo86kYp1eRqvM5> this Saturday 11th at 14:00 UK time (UTC+1)
The workshop will walk through streaming with a laptop using Broadcast Using This Tool, the Locus Sonus streambox software for Raspberry Pi or the free mobile app Locuscast.
It will supplement these basic streaming recipes <http://soundtent.org/streaming_recipes.htm http://soundtent.org/streaming_recipes.htm>.
Anybody would be welcome to join in.
We'll post a link to the platform at the workshop page in advance.
Best wishes Grant
https://mailchi.mp/a19fe8f1ffe8/reveil2020 https://mailchi.mp/a19fe8f1ffe8/reveil2020 <https://mailchi.mp/a19fe8f1ffe8/reveil2020 https://mailchi.mp/a19fe8f1ffe8/reveil2020> https://soundcamp2020.eventbrite.co.uk https://soundcamp2020.eventbrite.co.uk/ <https://soundcamp2020.eventbrite.co.uk/ https://soundcamp2020.eventbrite.co.uk/> #acousticommons _______________________________________________ Locustream / Locus Sonus Streaming Project http://locusonus.org/ http://locusonus.org/ To unsubscribe, send a message to locustream-request@nujus.net mailto:locustream-request@nujus.net with unsubscribe in the subject or the message http://nujus.net/cgi-bin/mailman/listinfo/locustream http://nujus.net/cgi-bin/mailman/listinfo/locustream _______________________________________________
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