Audacity Forum

BillyBiggtime wrote:Finally, here we go guys, here's the link to the piece they've used: http://www.premiumbeat.com/royalty_free ... itual-walk
What do we think? Have they maybe used the 'loops set' version to make it work somehow, programmed to play in repeated sequences to create a longer track from smaller files, resulting in a much smaller overall file size than if it were one continuous loop?

The 30 s preview file has 477 kb and is a 128 kbps, CBR, joined stereo mp3 file.
I do not see how this should be achievable with a wave file.

Robert J. H. wrote: The 30 s preview file has 477 kb and is a 128 kbps, CBR, joined stereo mp3 file.
I do not see how this should be achievable with a wave file.

So you're saying it is a WAV file, as far as you can see, but that it seems to be exceptionally small?

I'm still wondering whether they bought the 'loops' set, and then coded part of the programme to play each of 4-5 15 second loops in a particular order to create a longer piece.

No, I say it is one or more mp3s that amount to 400 kb.
The absolute greatest music compression can be achieved by saving the different instruments as a sound font and play them via MIDI instructions.

400 kb would only give about 3 s music as wave file, this isn't enough to produce all the layers in the sample file.
Hence, you can upload a mp3 with joined stereo at 128 kbps CBR.
By the way, the sample file is encoded with Lame too.

I have a feeling that the online files would be MP3s but that when you buy the files you'd get the WAV versions. What kind of file size would it be 4 x 15 second mono wav files in total? I guess one minute of mono WAV really - would that be around 5MB at standard 16 bit 44.1?

BillyBiggtime wrote:What kind of file size would it be 4 x 15 second mono wav files in total? I guess one minute of mono WAV really - would that be around 5MB at standard 16 bit 44.1?

Yes, that's right.

In that case, I remain at a loss as to how they've done it! Anyone got any ideas?

BillyBiggtime wrote:Anyone got any ideas?

My guess is that they didn't do it and that the file is actually much bigger than they said.