Correction:  the Indigo IO is 2 in / 2 out;  the Indigo DJ is 0 in, 4 out

Unless I am mistaken.

I'm guessing that the F/OSS options are basically:

Custom board design with PCI envy24 chipset => ALSA : JACK / ~2ms
IEEE1394 devices made by ECHO (AudioFire2/4) => FFADO : JACK / ~4ms
Cardbus devices made by ECHO (Indigo IO/DJ) => ALSA : JACK / ~4ms
USB devices (48kHz native rate) => ALSA : JACK / ~8ms

The cardbus is going to be easiest for a one-off project. ALSA drivers for the Indigo products are relatively mature. Some smaller ITX computer boards feature cardbus interfaces built-in.

I seem to remember seeing a 64studio-related hardware device that integrated an AudioFire2 though...

On Wed, Jul 23, 2008 at 8:10 AM, Phil Frost <indigo@bitglue.com> wrote:
I have an Echo Indigo IO that I had working in linux. It's a 2 in, 2
out Cardbus device. As I recall, I had to build a kernel because
whatever distro I was using didn't include the driver, but it was part
of the standard ALSA distribution. There is also a 4x4 version called
the Indigo DJ that is very similar and probably also compatible.

On Jul 21, 2008, at 7:31 PM, porl sheean wrote:

> [...]
> if i was wanting to develop a small (up to around 20cm square) device
> using an embedded linux setup, is there any high end (pro quality jack
> compatible) audio devices that are easily attainable? basically
> something like a high end adc/dac for minipci or something similar i
> suppose.
> [...]
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