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Any product exists capable of capturing NON_AUDIO spdif streams?
Any product exists capable of capturing NON_AUDIO spdif streams?
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Old 14th January 2019, 04:43 AM   #1
usagi is offline usagi
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Default Any product exists capable of capturing NON_AUDIO spdif streams?

Is there any product that is capable of capturing NON_AUDIO spdif streams? I want to capture ac3/dts 5.1 over spdif. All the devices I have tested mute the input if NON_AUDIO bitflag is set, which it is with ac3/dts bitstreams.

capture devices which mute NON_AUDIO input
ESI U24 XL 24-Bit USB Audio Interface for PC/Mac
M-Audio Audiophile USB

Last edited by usagi; 14th January 2019 at 06:52 AM.
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Old 14th January 2019, 05:39 AM   #2
rfbrw is offline rfbrw
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It mutes to prevent noise on the output. Modify the flag.
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Old 14th January 2019, 06:53 AM   #3
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Originally Posted by rfbrw View Post
Modify the flag.
how?
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Old 14th January 2019, 07:45 AM   #4
Markw4 is online now Markw4  United States
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You want to capture SPDIF to what device, and in what format? Also, how long of a record do you want to capture? Hours, minutes, seconds?
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Old 14th January 2019, 08:15 AM   #5
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Quote:
Originally Posted by Markw4 View Post
You want to capture SPDIF to what device, and in what format? Also, how long of a record do you want to capture? Hours, minutes, seconds?
I want to capture ac3/dts bitstreams to PC in raw ac3/dts bitstream format. Record hours. So, do you know a product which can do this?
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Old 14th January 2019, 09:26 AM   #6
Markw4 is online now Markw4  United States
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Originally Posted by usagi View Post
I want to capture ac3/dts bitstreams to PC in raw ac3/dts bitstream format. Record hours. So, do you know a product which can do this?
Not offhand. Something could be built, but it could potentially add up to a lot of data to store. First of all, I don't know the format of those bitstreams. If they are known then building something to capture them shouldn't be too hard. Lots of data acquisition stuff is available for National Instruments Labview or similar. That way you can get around have to write your own Windows driver for your interface hardware. They may already have audio processing libraries to import and decode standard SPDIF, not sure.
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Old 14th January 2019, 11:30 AM   #7
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Originally Posted by usagi View Post
how?
Forget messing about with flags no need with a computer. A card with AC3/DTS pass-thru and some audio software will do the job.
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Old 14th January 2019, 03:55 PM   #8
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Quote:
Originally Posted by rfbrw View Post
A card with AC3/DTS pass-thru and some audio software will do the job.
which is basically the original question I asked. which card?
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Old 14th January 2019, 05:36 PM   #9
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Lynx AES16
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Old 15th January 2019, 10:17 PM   #10
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anyone know if the adau1452 dev board could be used to passthrough spdif and modify the NON_AUDIO flag (bit 2 of channel status subframes)?

Last edited by usagi; 15th January 2019 at 10:20 PM.
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