[LAU] Searching for audio interface with software-controlled mic gain

Thomas Janu thomas.janu at gmail.com
Tue Aug 25 10:23:47 UTC 2015

On Tue, Aug 25, 2015 at 10:33 AM, Felix Homann <linuxaudio at showlabor.de>

> Thomas Janu <thomas.janu at gmail.com> schrieb am Di., 25. Aug. 2015 um
> 09:23 Uhr:
>> Hi List,
>> for a project at work (nothing to do with music, sadly, but at least
>> audio) I'm looking for an audio interface that supports at least
>> 16bit/48kHz (24bit/96kHz would be even better, we're potentially looking
>> for rather high frequency signals...) for two mics that need phantom power
>> and where the preamp gain can be controlled remotely by software,
> I'm using a Behringer XR18 for a couple of months now and I'm pretty happy
> with it (*). I have not really used it for recording though besides running
> some simple tests. It's 24bit/48kHz AFAICT, its frequency range 10 Hz - 22
> kHz.
> It is primarily a rack mixer that doubles as a class compliant audio
> interface. Everything can be remotely controlled via their control apps for
> Linux/Mac/Windows/Android/iOS (**) and via OSC.
> The smaller versions XR12/XR16 lack the audio interface.

This thing looks rather promising, thanks a lot!

> I use it as a mixer on stage. The audio interface is only used for
> playback purposes at the moment. But if you have concrete questions that I
> might be able to answer with a reasonable amount of testing time I'll
> gladly help.

So if I understand this correctly there is a USB connection for audio and
one would need an additional ethernet or wifi connection for controlling it?
The only things I'm interested in here is the control of the various gains
and a two channel recording - seems like that could easily be done with
this thing.
I'm guessing the audio interface is class compliant and simply exposes all
18x18 channels via alsa?

> Kind regards,
> Felix
> (*)
> Documentation is awful/not present. Behringer will delete any kind of
> criticism on its forum, especially when it comes to critcising not
> delivering on their own and their CEO's claims and promises in time. There
> still seem to be some bugs in the firmware, like wrong parameter bindings
> for some effects. My first device had defect pre-amps on 2 inputs but was
> immediately replaced by the seller. *Do not* rely on the internal router,
> you'd better not use it at all.

You mean the internal Wi-Fi router?

Thanks again,
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