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Date: Fri, 25 Apr 2014 18:18:50 +0200
From: Hans Petter Selasky <hps@selasky.org>
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To: Scott Aitken <freebsd-lists-3@thismonkey.com>, 
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Subject: Re: USB audio device on Raspberry Pi - link_elf: symbol isa_dmastatus
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References: <20140425154430.GA76168@utility-01.thismonkey.com>
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On 04/25/14 17:44, Scott Aitken wrote:
> Hi all,
>
> I'm hoping to use my RPi/FreeBSD as an Airplay device to my amplifier which
> presents a USB DAC.
>

Hi,

Audio devices which use ISOCHRONOUS data transport are not supported i 
FreeBSD, because the RPi uses very small buffers and has to handle 8000 
IRQ/s typically for ISOC transfers.

--HPS