Hi Frank,
ASI cards should only required for MP3. MP2's patent expired a number of
years ago and was added to Rivendell as soon as the patent expired. MP2
should be usable on any recent RD system (I don't remember the exact
version it was added, but I know it's worked well for me on v2+).
For the format it stored in, as I understand it, the MP2 is stored in a
wav container, not as a wav format. I haven't tried it with a Pi yet,
but have been working on that build to try MP2 on the Pi for a specific
use case I have.
Others are more informative than I am, I know. But hopefully this will
help you a little.
Tim
On 2/27/20 4:43 PM, Frank Christel wrote:
Noob question: why are ASI cards required to play MP2 files?
From the “Features and Benefits” list on the Rivendell home page: "Support for
both PCM16 and MPEG Layer 2 audio formats (MPEG Layer 2 support requires the use of
select sound cards available from AudioScience Inc.).”
(ASI cards are required by BSI’s Simian to play MP2s on Windows, too.)
Is the MP2 format so old there are no software decoders? Or is MP2 processing
so intensive in real time that it must be offloaded to an external sound card?
Is there a way for a RasPi Rivendale node to play MP2s without first converting
the files to WAV?
Frank Christel
______________
On 2/26/2020, at 5:49 PM, Fred Gleason <fr...@paravelsystems.com> wrote:
...Not all ASI cards are supported in any given driver version. For CentOS 7
setups, we provide three, v4.13.0, v4.20.10 and 4.20.21 (with v4.20.21 being
installed by default). Any ASI-5XXX or ASI-6XXX card (the ones with the orange
colored mu-metal shields) should be able to work with one of those drivers,
although sometimes some experimentation is required to find out which driver
does the trick… That said, ASI-4XXX cards (the ones with the blue mu-metal
shields) are NOT supported in Rivendell at all.
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