AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
Quiztones playback twice the speed3/23/2023 ![]() You get plenty more when fiddling with the harmonic structure.Ĭode example for the last one: %% make some disharmonic sounds Play back at double the speed: perceived pitch goes DOWN. Detune the octaves slightly (say multipler of 2.05 starting at 20 Hz).Play back at twice the speed: sounds exactly the same Stack octaves with equal amplitude starting with a low enough fundamental.Play back at double speed: sounds exactly the same. Stack up diminished fifth starting at a low enough fundamental (say 20 Hz).White noise: sounds exactly the same if you play it back at double the speed.In other words, "Maybe you have pitch shifted in such a way that the frequency jumps back on to itself" and also "Maybe you are taking advantage of some psychoacoustic phenomenon in which the frequency has changed but the perceived frequency does not"Īliasing and the limits of human hearing are relevant to this question but are not absolute requirements for the "paradox" that is mentioned here to occur. (the $2 \times$ here is just an example).Īnother two things that have appeared in responses so far are aliasing and some aspect of human hearing. Pitch shifting is not the core of the question and the technique of pitch-shifting does not change the nature of the question.Īs it was pointed out in one of the comments to this post and as a form of a hint: Yes, pitch shifting does alter the pitch of the "sample" but a) what sort of sample would sound almost identical to its unshifted version if it was passed through a $2 \times$ pitch shifter and b) what sort of sample would sound at a lower pitch if it was passed through a $2 \times$ pitch shifter. Variants of the technique of pitch-shifting / time stretching have been mentioned so far by more than one persons in relation to this question. How do these strange "sample" cases might "look like" (in terms of a mathematical description) and what are, broadly, the conditions that can lead to such cases? And some even stranger "sample" cases that when played back at twice their recording rate their pitch appears to be.lower! There are some strange "sample" cases however that when played back at twice their recording rate their pitch appears to.not have changed as expected. It is based in the Netherlands and primarily focuses on mobile and multi-touch app development.Usually, when some sample is played-back at twice the rate it was recorded, the pitch of the recording sounds an octave higher.įor example: $g(t) = \sin(2 \pi f t)$ and $g(2t) = \sin(2 \pi f 2 t) \implies \sin(4 \pi ft)$. Dan graduated from McNally Smith College of Music with a Bachelor of Science in Music Production and is the founder of Quiztones and The Pro Audio Files.Įpic Windmill is a software development company owned and operated by Laurence Muller (M.Sc.). Dan Comerchero is a musician and entrepreneur currently living in St. ![]() ![]() Quiztones for Android was conceptualized by Dan Comerchero and developed by Epic Windmill. To learn more about Quiztones, visit: and follow Quiztones on Twitter and Facebook.įor product photos and press release in MS WORD format, click. The Android version is available on the Google Play Store at an introductory price of $1.99. Quizzes included in Quiztones Android version 1:
0 Comments
Read More
Leave a Reply. |