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Reprocess your music with Dave Chapman's MP32WAV

By Chris Williams. Published: 5th Apr 19:47:06 | Permalink | Printable

Digital Music on RISC OS Digitally stored music can come in many different formats. If you have read Justin Fletcher's article on the music player AMPlayer then you will be aware of the MP3 format. Another format, commonly referred to as WAV format, stores the music in a basic "as is", uncompressed state. While WAV music files are very large they are more versatile than most formats, so you can, say, use a WAV music file to write the music to a CD using a CD writer.

If you can, imagine a file of digitally stored music as a Tesco shopping receipt. Music in MP3 format as a receipt would be the printed list we normally get: all items bought listed with multiple items shortened to something like "Pizza x3". Music in WAV format as a receipt would list all the items bought with all the individual ingredients of each item listed too. The WAV file is longer and more detailed for those needing the detail; the MP3 file is shorter, ideal for users just wanting to listen to the music.
So, older lower end machines can handle the playback of WAV format music rather than MP3 music because MP3 files are pre-compressed and playing them demands too much from older systems.

David Chapman has therefore released version 0.10 of his application MP32WAV. MP32WAV acts as a frontend to Dennis Ranke's command-line based converter and will convert MP3 format music to WAV file music by basically decompressing the music data into a more detailed, longer form ie: following the shopping receipt analogy, MP32WAV will fill in all the ingredients that make up the MP3 file to form a long list that things like CD Writers can use. Of course it will take some time to process a MP3 file but even the most impatient of us will not be too fussed. As part of his update, David has fixed a minor bug left in from previous application development and, according to his recent announcement, added the following features:

  • conversion progress is now displayed both numerically and graphically so that you can gauge how long you have to make a cup of tea and read the newspaper before going back to the keyboard.
  • an alert now sounds when conversion of each file is complete and a different sound when all file conversion has finished, so now you will hear when it's time to get back to the keyboard.

"It is very simple to use, just drag an MP3 file to the main window and hit 'OK' and sit back and wait for the WAV to appear", David explains in hi announcement. "Batches of MP3's can be converted by putting them into a directory and then dragging that directory to MP32WAV. The WAV files can be saved anywhere by dragging the wav icon from the main window to a drive or directory of your choice or you can simply use the default setting which is inside the MP32WAV application."

I contacted David, who interestingly enough works on a North sea oil platform, to find out more about his musical application.
"There's not much to say really, it's just a front end to Dennis Ranke's one line command line program for producing the wav code from the AMPlayer module (recently updated by Justin Fletcher) which does the actual decoding", writes David. "I have just made it user friendly and added a few 'bells and whistles' here and there."

David also told me that MP32WAV is for StrongARM RiscPCs only due to the specialist processor code involved with the AMPlayer module.

MP32WAV: mp32wav.riscos.org.uk

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