Sound formats

Ken Norris pixelbird at interisland.net
Sun Sep 25 15:54:16 CDT 2005


On Sep 25, 2005, at 5:26 AM, use-revolution-request at lists.runrev.com 
wrote:

> Date: Sat, 24 Sep 2005 23:54:42 -0700 (PDT)
> From: Judy Perry <jperryl at ecs.fullerton.edu>
> Subject: Re: Sound formats
>
> I and my students have encountered numerous problems using WAVs (of
> course, _we're_ not professionals!) as opposed to AIFFs.

Not at all surprising. Why? See below.
>
> Aren't some of the WAVs compressed?

Not the main issue.
>
> We've seen WAVs that worked in Rev fine on one platform but not 
> another,
> and vice-versa (no apparent pattern, but, then, given that the WAV
> solution appeared to be 'no worky', we didn't look, either).
>
> FWIW...

Here's the problem: WAV files are so common, especially in the PC 
world, that many programmers have used them as a base to come up with 
their own bastardized versions specific to their software. There are 
very many of these. Different headers, layered versions which contain 
bundled data used for multi-track recording, etc.

The result is that some playback venues simply won't recognize some WAV 
files, because of those shaded differences from what you might call a 
'standard' WAV file (not entirely sure there actually _is_ such a thing 
anymore)..

Example: I needed a particular very broad string orchestra synth sound 
for my Roland SPD-S synth pad (which loads WAV files as well as sampled 
clips), to use in a Easter Contata concert (along with a plethora of 
real instrumentation) looking for a very effective overall final result 
that would work. I transferred a Melody Assistant file into GarageBand 
so I could use the effects AU's to get exactly the sound I wanted, 
which, of course, creates an AIFF file, then passed through Sound 
Converter to make it into a WAV.

It took maybe 15 -20 tries to get the Roland to recognize the files. 
Eventually, after rebuilding the files in different sequences, trying 
several different renaming techniques, a few different types of WAV 
files, etc., I eventually got it  to work.

None of that converting stuff was much fun, I must say. I had to give 
up one evening because I was just too frustrated to go on. The next 
day, after a good night's rest, I was finally able to get it. Over 6 
hours total time, for _one_ long note (well, actually two, a 'D' and a 
'C', but they were the same type of sound, played at different times in 
the intro).

The result in concert, as simply a part, together with the live 
instruments, was absolutely awesome, worth all the effort. Sometimes 
that's how it is with music, isn't it?

All the best,
Ken N.




More information about the use-livecode mailing list