#390752 - 01/19/00 02:47 PM
Mike Sokol's Recipe for Success?
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valentin
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Registered: 01/19/00
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Loc: Tarrytown, NY USA
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Hi all.
I have misplaced my Feb. 1999 Issue of EQ, and was wondering if anyone could post the Cookbook Recipe for success in burning AC3 to CD-R for multi-channel audio playable on a DVD player. (Also any additional tips, suggestions if anyone has tried this.) I'll be using Astarte's A.Pack - Hope this will work.
Any input would be greatly appreciated - I need to try this ASAP - Thanks
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valentin
artist, producer, ninja
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valentin
artist, producer, ninja
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#390753 - 01/20/00 12:45 AM
Re: Mike Sokol's Recipe for Success?
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Roger Nichols
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Registered: 12/13/99
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Loc: Miami, Florida
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Valentin
I assume that you have some way to produce the AC-3 file needed. You have to have either Soft Encode, or some other hardware or software encoder to produce the files.
Next, you need to make the CD-R.. It will be an audio CD with the encoded file, not a CD-ROM. Most DVD players will not play back a CD-R, but they will play back a CD-RW. If this is the case with your DVD player, then you will have to burn a CD-RW in Disk-At-Once (record the entire disk, not single cuts). The CD-RW will play on the DVD player and the AC-3 will decode.
Roger
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#390754 - 01/20/00 03:00 PM
Re: Mike Sokol's Recipe for Success?
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valentin
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Registered: 01/19/00
Posts: 2
Loc: Tarrytown, NY USA
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Thanks Roger,
I will be using Astarte's A.Pack which can encode the AC3 file necessary for this.
If I understand you correctly, I will more than likely need a CD-RW burner. (It seems that for playback on most DVD Players, my CD-R burner will not do the job?)
I do have another question. What is the cutoff frequency on the LFE/Sub channel in 5.1? And is this cutoff generally a limitation imposed by the encoder, or one that is imposed by the decoding process in most DVD players. I am asking because I would like to use the Sub-channel for some other audio info, but will need frequencies above 80 or 100 hz. If I encoded a normal full bandwidth (or at least higher than normal "sub" bandwidth) audio file for the Sub/LFE channel, will I be able to decode it and hook my analog out to something other than a subwoofer?
Thanks in advance for any answers you might have. I'm trying to do some pretty tricky things with the format, and information pertaining to tricks and workarounds for special applications is hard to find.
valentin
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valentin
artist, producer, ninja
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#390755 - 01/20/00 05:57 PM
Re: Mike Sokol's Recipe for Success?
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Anthony Savona
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Registered: 01/20/00
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Loc: New York, NY, USA
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To see Mike Sokol's original article, visit his Web site. The article's exact link is http://www.soundav.com/link46.html.
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#390756 - 01/21/00 01:09 AM
Re: Mike Sokol's Recipe for Success?
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Roger Nichols
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valentin
Your CD-R burner won't do the job if your DVD player won't read them. I burned a CD-R and a CD-RW and went around looking for a DVD player that would play everything. I found a Pioneer player that would recognize CD-R media. It is the model DV-414 and cost about $329 in the US. It also has 96kHz 24 bit converters. It will play AC-3 that is encoded and burned on CD-R.
I guess you have to decide whether to buy a CD-RW, or a new DVD player.
The LFE channel is limited in bandwidth during the encoding process. The specs say 25 Hz to 120 Hz. Anything above that is left out. Also if the player is set to playback the surround program in stereo (downmixing) the LFE channel information is left out of the mix, so it is a good idea to mix some of the low end information into the front channels.
Bass management is the trickiest part of surround mixing. The best teacher is trial and error. Mix, run it thru the encode/ decode process and listen. Make changes and do it again.
You can connect the subwoofer connection to anything you want, but the bandwidth is still limited to 120 Hz.
Roger
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#390757 - 01/24/00 08:42 PM
Re: Mike Sokol's Recipe for Success?
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J. Michael Sokol
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Registered: 01/24/00
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Loc: Hagerstown, MD
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Roger and Valentin...
The real trick to getting an AC-3 file to play back as a Red Book audio CD has to do with the encoding software being able to "pad out" the AC-3 data so that it "fits" in the same space as a stereo 16-bit 44.1 kHz WAV file. As you're already aware, I figured out how to do this in Sonic Foundry's Soft Encode, and I'm working on how to do it in Astarte's A-Pack. So check back either here or on my website at http://www.soundav.com in a week or so, and I should have an answer as to how to make this work on a Mac.
Mike Sokol http://www.soundav.com
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#390758 - 01/26/00 12:51 PM
Re: Mike Sokol's Recipe for Success?
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Mike Sokol
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Registered: 01/24/00
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Loc: Hagerstown, MD
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Everyone,
If you want to try this process for yourself but don't have a Dolby Digital encoder yet, I've posted a test AC-3 file in the proper format on my website at http://www.soundav.com. Just download, unzip it, and burn an audio format CD with the file. Rinse and repeat....
Mike Sokol
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