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Re: [AUDITORY] External class compliant sound cards

Dear Kamil,
in my experience, sadly, to operate with Linux and external sound card the only available documentation can be found in the communities scattered accross the Internet. While it is not up to date this page can be a starting point: https://wiki.linuxaudio.org/wiki/hardware_support

To work with different sampling rates or other "unusual" audio parameters I suggests to work with ALSA instead of wrapping it with Pulse. There is a long and not so clear historical reason but to put it simply: ALSA is more realiable and it works directly with the kernel while Pulse works in user space and the configuration can be quite difficult.

I never run an experiment with Linux but I found the Focusrite Scarlett 6i6 a good and stable choice (also for the price range).

Regards,
Roberto Barumerli

-- 
Roberto Barumerli,
Ph.D. student

Dept. of Information Engineering
University of Padova
Via Gradenigo 6/B,
35131 Padova, Italy

Skype: roberto.baru 
Website: dei.unipd.it/~barumerli
Il 29/05/2019 11:59, Kamil Adiloglu ha scritto:
Dear list,
I am compiling a list of suitable sound cards for a mobile real-time experimental setup. There are some criteria that such sound card should fulfil:
- External sound card: We have a mini PC with an on-board sound chip. We want to use an external sound card with a decent sound quality. Our mini PC has USB-2, USB-3, USB-C (Thunderbolt 3) connections.

- Class compliance: We have a real-time signal processing platform, which runs on Linux (Actually it also supports Windows and Mac, but we prefer Linux). Therefore we need a sound card, which Linux can operate. Manufacturers usually do not officially support Linux, but there are some, which run under Linux, because they are class compliant and do not require a dedicated driver.

- At least 4 (preferably 6) analog (identical) inputs and at least 2 analog (identical) outputs

- Lower sampling rates: As we will do real-time signal processing, we prefer lower sampling rates for the sake of computational complexity. Therefore, ideally we would like to have a sound card, which supports even 16kHz, but 32kHz also OK.

I know that these criteria are now easy to fulfil. So far, I couldn't find any sound card, which fulfils all the requirements. In the worst case, we can sacrifice the last requirement and downsample our sound input before processing, but it is a good-to-have one.

We would appreciate any suggestion. Thank you in advance.

Best Regards,
Kamil Adiloglu


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Dr. Kamil Adiloğlu
Forschung und Entwicklung

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