I have been pretty lucky with USB Audio: I've been running a stream 24/7 since 2015 with the Locus Sonus streambox image and a Behringer UCA202 (USB with RCA line in/out, no mic preamps) with no stability problems. No config reqiuired.
The IQuadio boards have a preamp with bias for electrets, but it looks like they're mono. (The preamp seems to be built-in to the CODEC chip they're using. Those are usually quite noisy.)
If folks want high quality stereo preamps for 3.5mm "plug-in power" mics, with no external power supply required, the already-mentioned PiSound looks like a promising option (I haven't used one.): https://blokas.io/pisound It's expensive, though. Note: plugin power bias is disabled by default, but can be enabled by soldering a jumper:https://blokas.io/pisound/docs/Audio/#6v-bias-solder-jumpers
If you have XLR mics, a "professional" USB interface like the Behringer UMC202HD is a little more money but it should work fine and you can use it for other computers too (no drivers required). 2 low-noise XLR preamps with phantom power, powered by the USB port. Grant uses the Focusrite Scarlett 2i2, which is similar and a bit more money.
Lots of great options. Viva REVEIL!
-Z
On 2020-04-09 14:22, udo noll wrote:
hi Milos, Peter & all,
there was the wolfson / cirrus logic board with stereo line in and plugin, worked good with eg. primo capsules, or any other PIP / electret condenser mic. discontinued, not available any more.
there is the IQ Audio http://iqaudio.co.uk/hats/100-pi-codec.html where Grant, Gregoire, I and others have been sort of involved, at least we've been providing ideas to IQAudio.
this board sounds good and works with the mentioned mics. but it's sort of ... unbalanced ... and not intuitive to configure, though not complicated. at the moment I'd say it's the best available.
then there is usb audio, means you can connect a usb mic, or recorder, or soundcard, works most of the times, but is not stable (my experience) for days or longer.
let me know if you need more info or help. all above is valid for raspberry pi. there's also the option to use a phone with USB device, host cable / adapter required.
bests, Udo
miloš vojtěchovský: 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 Komu: zvukac@centrum.cz, 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--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.
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://soundcamp2020.eventbrite.co.uk https://soundcamp2020.eventbrite.co.uk/ #acousticommons _______________________________________________ Locustream / Locus Sonus Streaming Project http://locusonus.org/ To unsubscribe, send a message to locustream-request@nujus.net with unsubscribe in the subject or the message http://nujus.net/cgi-bin/mailman/listinfo/locustream _______________________________________________
pbcusack@gmail.com
Locustream / Locus Sonus Streaming Project http://locusonus.org/ To unsubscribe, send a message to locustream-request@nujus.net with unsubscribe in the subject or the message http://nujus.net/cgi-bin/mailman/listinfo/locustream _______________________________________________
_______________________________________________ Locustream / Locus Sonus Streaming Project http://locusonus.org/ To unsubscribe, send a message to locustream-request@nujus.net with unsubscribe in the subject or the message http://nujus.net/cgi-bin/mailman/listinfo/locustream _______________________________________________ _______________________________________________ Locustream / Locus Sonus Streaming Project http://locusonus.org/ To unsubscribe, send a message to locustream-request@nujus.net with unsubscribe in the subject or the message http://nujus.net/cgi-bin/mailman/listinfo/locustream _______________________________________________