In this episode of Minute GarageBand,
we’re going to show you how to fix an imported file that’s playing at a higher tempo and pitch than what expected.
GarageBand plays back files at a sample
rate of 44,100 cycles.
Sometimes in order to save space and bandwidth, recordings of things such as speech recorded
at a lower sample rate since the range of frequencies, a typical voice creates is in a rather
narrow band.
The problem is that even if a file is recorded
at, say, 11,000 samples per second,
GarageBand is still going to play it back
at 44,100 samples per second.
you’re familiar with vinyl records, it’s similar to taking a 33.3 rpm record and playing it at 45 RPMs, it will play fast, and at a higher pitch.
Here’s an mp3 file that was recorded at
11,025 samples per second.
we drop it into the GarageBand timeline and play it… you can easily hear the problem
What we need to do is convert it to a file with a sample rate of 44,100, and we can easily do this using iTunes.
Open iTunes’ preferences click the Import Settings button
Choose AIFF Encoder from the Import Using popUp menu
Choose Custom from the Setting popUp menu and make sure the sample rate is set
to 44.1k now you can close the preference windows control-click on the file and select “Create AIFF Version”
Now we drop that newly created file back into the GarageBand timeline and it will play at the correct tempo and pitch
That’s all we have for this episode We hope you found it useful
