Re: are cheap USB cards with analog line input supported by ALSA ?

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On Mon, 30 Apr 2012, Sergei Steshenko wrote:

> Hello,
>
> I see a number of relatively cheap soundcards on eBay:
>
> http://www.ebay.com/itm/W449-USB-6-Channel-5-1-Audio-Sound-Card-S-PDIF-Exter-/250754613678?pt=LH_DefaultDomain_0&hash=item3a6223c1ae ;
> http://www.ebay.com/itm/C449-USB-6-Channel-5-1-Audio-Sound-Card-S-PDIF-Exter-/170729413148?pt=LH_DefaultDomain_0&hash=item27c0441a1c ;
> http://www.ebay.com/itm/USB-6-Channel-5-1-External-Audio-Sound-Card-S-PDIF-/190490619104?pt=LH_DefaultDomain_0&hash=item2c5a202ce0 ;
> http://www.ebay.com/itm/USB-6-Channel-5-1-External-Audio-Sound-Card-S-PDIF-SC6-/390369489431?pt=LH_DefaultDomain_0&hash=item5ae3d5b217 ;
> http://www.ebay.com/itm/New-USB-6-Channel-External-Audio-Sound-Card-S-PDIF-PC-/270748963523?pt=LH_DefaultDomain_0&hash=item3f09e552c3 ;
> http://www.ebay.com/itm/External-USB-6-Channel-7-1-Audio-Sound-Card-S-PDIF-877-/180660714139?pt=LH_DefaultDomain_0&hash=item2a1037ba9b ;
> http://www.ebay.com/itm/USB-6-Channel-5-1-External-Audio-Sound-Card-S-PDIF-Consumer-interface-SC6-/180872462245?pt=LH_DefaultDomain_0&hash=item2a1cd6bfa5 ;
> http://www.ebay.com/itm/Multi-sound-effects-USB-6-Channel-5-1-External-Audio-Sound-Card-Laptop-PC-/110860124104?pt=LH_DefaultDomain_0&hash=item19cfc73fc8 - in this listing CMedia is mentioned
> ;http://www.ebay.com/itm/6-Channel-6CH-USB-2-0-5-1-External-USB-Video-Audio-Adapter-Audio-Sound-Card-NEW-/270955321001?pt=LH_DefaultDomain_0&hash=item3f163216a9 - in this listing CMedia is mentioned ;
> http://www.ebay.com/itm/NEW-USB-2-0-5-1-Channel-Speaker-System-Sound-Adapter-/250666394781?pt=LH_DefaultDomain_0&hash=item3a5ce1a49d - in this listing "USB Audio Device Class Specification 1.0" is mentioned
>
> and similar.
>
> Does anybody know whether these are supported by ALSA, what chip(s) are used, etc. ? I interested in "Line In" (capture) support.

Do you really expect that someone has gone through all those soundcards,
determined the chipsets and tested them with alsa? Buy it and try it.

If they follow the usb specification for soundcards they should work. But that
is a big if.


Note that they might require the loading of firmware, and it may well be that
Linux/alsa does not have the appropriate software to load that firmware onto
the cards.

So, buy them all, test them and let us know. 
(but why don't you just use the onboard soundcard on your computer?)


>
> Thanks,
>  Sergei.
>
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-- 
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Exclusive live event will cover all the ways today's security and 
threat landscape has changed and how IT managers can respond. Discussions 
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threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
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