On Aug 24, 2005, at 1:38 PM, Daniel Steinberg wrote:
Sebastian:
>The audio files are most likely going to be compressed as m4a
and MP3, so I thought the easiest thing would be to let Quicktime
do the decompressing of the files and supply me with the raw data!?
You want to use the new MovieAudioExtraction APIs to get your
raw, decompressed audio samples.
The AudioExtractionPanel code example at <http://
developer.apple.com/samplecode/QTAudioExtractionPanel/
QTAudioExtractionPanel.html > provides a good example of using the
MovieAudioExtraction APIs.
Won't that limit his Application to Tiger and Panter/QT7 systems?
Daniel Steinberg
QuickTime Engineering
At 9:16 PM +0200 8/24/05, Sebastian Probst Eide wrote:
I have never been programming with audio before but would like to
create a program that reads parts of a user selected audio file
and analyzes certain frequencies.
The audio files are most likely going to be compressed as m4a and
MP3, so I thought the easiest thing would be to let Quicktime do
the decompressing of the files and supply me with the raw data!?
Is there a way to do that?
I have been surfing and reading quite a lot on the developer site
but most of the links I found pointed to information from 1998 and
1999... which I doubt are very up to date!
I would be grateful if somebody could post me links to documents
where I can read more about getting access to raw audio data or
tell me more about which technologies to use and where to find them.
The solution is probably including the use of Core Audio but the
idea of having to go to low level frightens me a bit :D
Thanks in advance!
Best regards
Sebastian Probst Eide
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