> Gordan Bobic <gordan@bobich.net> writes:
>
>>> However you're
>>> right that something like the Wandboard is more powerful. Looks like
>>> I
>>> can get a Wandboard Solo + Case + Power for about $100, not quite
>>> double
>>> the cost of the RPi for about 2x the performance.
>>
>> Indeed. Do you have a form factor preference, though?
>> Most solutions like this have some uglyness associated, e.g.
>> an external power brick. D2Plug is a single brick, just
>> plug into power socket. But performance could conceivably
>> be an issue.
>
> No, the boxes are going to be hidden in closets. Having an external
> power brick is actually better for heat dissipation, IMHO.
Fair enough. My personal preference is toward reducing the cabling
sprawl.
>>> cheap enough then having one box per zone would be fine. But I'm not
>>> looking for NAS or anything else today (actually I plan to build a
>>> large
>>> multi-TB NAS server, but it's not going to be ARM-based).
>>
>> ARM based multi-TB NAS is actually quite doable:
>>
>> http://www.altechnative.net/2014/02/23/qnap-ts-421-review-modification-and-redsleeve-linux/
>>
>> I have it running with 4x4TB HGST drives and ZFS (fuse) RAIDZ2.
>
> Sorry, but multi-TB I mean starting with something like 24TB and
> expanding out to ~100. I was planning to build a FreeNAS box for this
> using a 4U 24-bay case which requires ~3 PCIe slots.
Fair enough.
>>> So thanks, all. I think I'll order a Wandboard Solo to test this
>>> out.
>>> I can always select different hardware later, or upgrade to the Dual
>>> or
>>> Quad if I find I need more CPU power. But audio processing doesn't
>>> really require lots of CPU. I was able to do basic DSP functions on
>>> my
>>> 8-bit 6502-based Atari 800 back in the mid-1980s, with only 48K of
>>> RAM.
>>> I'm sure 512MB on an ARM can do much better, provided there is
>>> sufficient design of the board so we don't get electrical
>>> interference.
>>
>> Depending on the form factor you are looking for, there are
>> ARM boards out there with PCI/PCIe slots. You could get one
>> of those and use a PCI/PCIe sound card in it. It would be a
>> lot more expensive, though.
>>
>> On the cheap, there are always USB audio options. A USB
>> sound dongle can be had for about £2, and you could plug
>> that into any ARM device featuring a USB port (i.e. most
>> of them these days).
>
> Do you have a reference for these USB sound dongles (that are also
> supported by Linux/ARM)? I've not found anything that inexpensive.
I use these with great success on my gaming Windows virtual
machines:
Never tried using them on Linux, but I'm pretty sure it comes
under the heading of generic USB audio (snd-usb-sudio driver).
At ~ £1.39 it may just be worth a try.
Gordan
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