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8th April 2005, 15:57 | #1 | Link |
moron
Join Date: Jan 2005
Location: Budapest, Hungary
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'Capturing' AC3
Hi there. Just an idea i may play with, bit i'm failed atm. i've got an an asus A7n8xdlx, equipped with nVIDIA's real time DD encoder. What i would achieve is to send any 6-ch wave thorugh soundstorm and record the AC-3 output of the audio chip. is it possible to do in some way?
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8th April 2005, 21:17 | #2 | Link |
nobody's nobody
Join Date: Mar 2005
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It's a quite interesting issue.
If you right-click-open any 6chwav with Graph Editor, you will see the preferred components linked together to decode. If you can replace the 'default wavout device' with 'nVidia nForce Audio' in the WDM Streaming System Devices and capture from it(maybe spdif), I think you can get the SoundStorm encoded AC3. But the reality can be very much different. Instead, you can try ac3filter and WAVDEST+file writer(or dump ds filter) to capture the ac3filter encoded AC3 stream(the source must be 48K), which plays directly to the spdif by wav renderer but not a correct AC3 file I believe. |
11th April 2005, 01:57 | #3 | Link |
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Check out this thread (mentioned in the FAQ )
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11th April 2005, 11:16 | #4 | Link |
nobody's nobody
Join Date: Mar 2005
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Yeah, it's an (another) proven way to capture the soundstorm ddlive encoded AC3 using additional bit-accurate (professional) sound card.
The internal(TTL) or external(toslink) connection(soundstorm spdif-out-> audigy(or m-audio) spdif-in) captured ac3 stream can be stripped to ac3 file using besplit(ddwav correction) I suppose. And the initial 'quest' was capturing the ddlive encoded ac3 directly? Last edited by Rockaria; 11th April 2005 at 22:25. |
25th April 2005, 02:19 | #5 | Link | ||
nobody's nobody
Join Date: Mar 2005
Location: The Sun, somewhere around
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Yeah, we can capture the Sound Storm encoded AC3.
I did a further test based on the spdif-in capture with my AN7(nForce Audio driver 3.75).
I connected spdif-out & spdif-in front panel pins using a jumper(sorta TTL connection) Capturing a dts music(ac3 ecoded by ac3filter or soundstorm DICE) using sound recoder from spdif-in was successful at first. The output played well with vlc as 5.1ch ddwav. Converted to ac3 using besplit commandline(no drop fix) and played well. Quote:
Quote:
[edit] The final AC3(through besplit) was 48K as encoded by sound storm, so can be played directly(passthrough) using AC3 Filter or VLC. ... SPDIF/AC3 speakers: 3/2.1 (5.1) sample rate: 48000Hz stream: 8bit frame size: 2560 bytes nsamples: 1536 Last edited by Rockaria; 1st September 2005 at 02:26. |
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