MoonLitNite
User
Oct 19, 2007, 2:21 AM
Post #7 of 12
(1720 views)
Shortcut
|
|
Re: [txbonfire] Adobe Premiere Pro Audio Sample Rate
[In reply to]
|
Can't Post
|
|
Hi Angelea,
So many questions, so little time <wink> Okay, first off we're talking about how often the analog-digital converter samples the input frequency spectrum. Since you originally encoded at 32Khz, you'll never recover what's lost at the high-end of the human range of hearing (18hz-20,000hz). BTW, to get good fidelity we need to sample the original frequency 2.6 times, so the maximum input frequency you've saved at 32Khz is around 12,000hz. Anything above that is adieu, adios, arrivederci, auf wiedersehen, au revoir, bye, bye-bye, cheerio, good-by, goodby, good-bye, goodbye, good day, sayonara, so long...
While you can use your editor (PP, Audition, etc) to encode at a higher rate - no problem there and the extra disk space is negligible compared to video. But there might be several good reasons to conform to a higher rate:
1. Compatability - perhaps you'll export the audio and either require a like-for-like sampling rate or find the player (Flash) doesn't play the file correctly, i.e., the "chipmunk effect"
2. Downstream audio processing - perhaps you'll process/reprocess/rereprocess the audio in a way where having a higher sampling rate helps maintain the stored (32Khz) fidelity. As long as you keep the file in WAV format, this shouldn't be a problem but once save in a lossy format like MP3 and then edit/process (which I'd never recommend) you'll be happy you saved the file at a higher sampling rate.
Hopefully this theory and practical examples will help - you can learn more about theory here:
http://en.wikipedia.org/.../Sample_%28signal%29
http://en.wikipedia.org/wiki/Sampling_rate
Michael
Happy Trails to you... until we meet again
(This post was edited by MoonLitNite on Oct 19, 2007, 2:21 AM)
|
