Problem: Many of my first audio projects were recorded with a sampling rate of 48 kHz but CDs are at 44.1 kHz. Also, Last.fm and other flash players only support 44.1 kHz sampling rates.
Conclusion: Resample my songs from 48 to 44.1 kHz.
The Hard Part: Resampling can be a dangerous task because there are many ways to go about resampling a song. First, you can resample the raw audio project or resample the raw output. Second, there are many different resampling algorithms.
To tackle the first question I decided that it’s never a good idea to resample the project files because in the future there may be better resampling algorithms or something. You want your project files to stay as pure as possible. That means I’ll just resample the exported wav file which leads to the next question: what is the best resampling algorithm to use? I did a lot of online reading and came up with a UNIX tool called “resample.” It uses the FIR method for resampling. To get a second opinion, I asked on the Ardour IRC channel what they thought I should do and there was an unanimous responds: “Make sure to use the Secret Rabbit Code.” It turns out that Ardour uses the SRC to export the wav file and when I looked into it further, Ardour could also use that same algorithm to resample on export!
All the reading I had done and if I would have just blindly used Ardour to resample on export I would have gotten the same results.
Result: Now I am able to have all my music available on Last.fm as well as using a flash player on the music section of this site so visitors can preview songs.
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