Burning DVDA - Detail

Posted by: Mr Underhill on 09 June 2006

Dear All,

In the past I've posted about burning DVDA. Thought I'd do a more detailed briefing ...if nothing else it will be a aide memoir for me!!

As the likelyhood of commercial DVDA disappears into the sunset I thought I'd do a more detailed post on producing DVDA, for those with the DVDA module in their DVD5.

The first thing is to get hold of a higher bitrate file. This can be done by:

1. Downloading such a file; or
2. Recording one.

Files can be downloaded from:

http://www.archive.org/browse.php?collection=etree&field=%2Fmetadata%2Fcreator


To create higher res files you need to use some form of ADC.

Small recorders can be bought from companies such as Edirol & M-Audio. There are reviews of these machines on the internet.

I chose the M-Audio 9624 as:

1. It allows recording of audio up to 96KHz & 24 bit;
2. Allows recording from a mike, inc. phantom power;
3. Allows recording via s/pdif;
4. Allows recording via RCA.

This means I can record from Vinyl & Tuner, in addition to live recordings.

The following briefing has been based upon processing on Windows XP.


The M-Audio 9624 in fact produces files ID'd as 32 bit float by Audacity - a free opensource audio file editor:

http://audacity.sourceforge.net/

Load up the file & check the bit rate. If 32 bit float change to 24 bit.....or lower, such as 16 bit / 44.1KHz if you want to burn a CD.

Edit the Preferences. Go to the File Formats tab. Change the Uncompressed Export Format to 24 bit, or lower.

Go to File -> Export to Wav.


Having obtained a suitable file there are a number of commercial packages to produce the DVDA, I used DVDA-Author, a free opensource product:

http://dvd-audio.sourceforge.net/

It can be downloaded, and instructions are provided:

http://dvd-audio.sourceforge.net/howto.shtml

Include dvda-author.exe in a directory in your Path, or change your Path to include the directory where it sits - System / Advanced / Environmental Variables / System Variables.

Open a command window - Run -> cmd

dvda-author -o DVD -g *.wav (see note below)

Where DVD = name of the directory within which the structure and files will be created.

If the wav file is not in the directory where you issue the command include the full path to the wav file.


To create an ISO file using the commands in the HowTo download a version of mkisofs that will run in Windows:

http://smithii.com/?q=node/view/9

Unpack the zip file and place the executables and the cygwin1.dll file in the system32 directory, this is in the Path.


Follow the instructions to produce the ISO file:

mkisofs -o image.iso -sort sort.txt -udf DVD



Now burn the DVDA iso file.....and have a listen.



In this I have not described how the audio file can be handled within Audacity, or split the file into tracks.


Even if DVDA ends keeping archives of uncompressed music in 9624 gives us a methodology that is relatively cheaply available, in a common format - wav &/or FLAC.


Playing the DVDAs back through DVD5 -> Benchmark DAC1 gives some VERY satisfying results.


Martin


Notes:
I have found that errors can occur is the 24bit file has an uneven number of samples = padding error.

My solution to this has been to convert the wav file to a FLAC file, using:

http://flac.sourceforge.net/