I don't know where I can find bats nearby so I couldn't try it but how does it work? The book makes it sound like you can use any mic, even one built into a laptop for this? I suppose that's plausible looking at a typical mic's frequency response graph, they are just cut off at 20khz, and don't roll off after 20khz like I thought they would, but what about the sample rate? At 44.1kHz doesn't that mean anything over 22khz is more aliasing or harmonic distortion than an actual recording of bat sounds?
On Sat, Apr 18, 2020 at 11:37 AM Michael Koch <[email protected]> wrote: > > Am 18.04.2020 um 16:52 schrieb Michael Glenn Williams: > > The subject line about ultrasound caught me eye on this thread that woke up > > from last year. > > Can anyone tell us what the original interest in ffmpeg and ultrasound is? > > Well, you can use FFmpeg to convert ultrasound to lower frequencies, for > example if you want to hear bats. I have described that in my book, see > chapters 3.14 and 3.19 (but the chapter numbers may change in future) > www.astro-electronic.de/FFmpeg_Book.pdf > > Michael > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
