On May 12, 2019, at 11:51 AM, Nicolas George <geo...@nsup.org> wrote: > > Paul B Mahol (12019-05-12): >> Calling atempo filter atempo when it also modifies pitch is bad for users and >> at same time not having apitch filter, user would think that they can >> not alter pitch. >> Sorry if you can not understand my fears. > > As I have pointed to you (but you made a show of misunderstanding on > purpose), changing the pitch and changing the speed of an audio signal > are fundamentally the same thing, they are connected by the sample rate. > > In my experience, most people are aware of that, including completely > non-technical people: they know that if you speed up or down a sound, > its pitch changes.
Coming from the audio world, tempo, and pitch are different things. Using a smart algorithm. I can speed up the tempo of clip without changing the pitch. Or, inversely, I can modify the pitch without changing the tempo. We look at "tempo" as beats per period (usually minutes). We look at pitch as the "tone and timbre" of a given sound (transposing a note from D to F#, for example). > The documentation, of course, can be enhanced to make sure it contains > all keyword a user is likely to search. And if the options can be > tweaked to allow setting exactly the wanted output in the most > convenient way (like we have a setdar, even though only the SAR exists > in the library), it is even better. This would be helpful since I had previously looked into adjusting the playback rate without the associate "Alvin and the Chipmunks" effect and didn't uncover anything within a deep DDG and Google search. -- Tim _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
