By Joshua D. Reiss, Andrew McPherson
"Audio results: concept, Implementation and alertness explores electronic audio results proper to audio sign processing and tune informatics. It offers basic historical past details on electronic sign processing, targeting audio-specific elements that represent the construction block on which audio results are built. The textual content integrates conception and perform, concerning technical implementation to musical implications. it may be used to realize an figuring out of the operation of current audio results or to create new ones. as well as supplying unique assurance of universal (and strange) audio results, the booklet discusses present electronic audio criteria, such a lot particularly VST and AudioUnit. resource code is equipped in C/C++ and applied as audio impression plug-ins with accompanying sound samples. each one component of the publication contains examine questions, anecdotes from the background of song expertise, and examples that provide invaluable real-world perception, making this a great source for researchers and for college students relocating without delay into industry"-- Read more...
summary: "Audio results: thought, Implementation and alertness explores electronic audio results appropriate to audio sign processing and track informatics. It provides primary historical past details on electronic sign processing, targeting audio-specific facets that represent the construction block on which audio results are constructed. The textual content integrates conception and perform, pertaining to technical implementation to musical implications. it may be used to realize an knowing of the operation of present audio results or to create new ones. as well as offering certain assurance of universal (and strange) audio results, the publication discusses present electronic audio criteria, such a lot significantly VST and AudioUnit. resource code is supplied in C/C++ and applied as audio impression plug-ins with accompanying sound samples. every one portion of the ebook contains research questions, anecdotes from the heritage of song know-how, and examples that provide priceless real-world perception, making this a fantastic source for researchers and for college kids relocating at once into undefined"
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Additional info for Audio Effects: Theory, Implementation and Application
17) suggests that arbitrary pitch shifts are possible by choosing the rate Δm at which the delay length varies, real-time audio effects are limited by two practical considerations. First, real-time effects must be causal, which implies that the delay length M[n] must be nonnegative. If we want to increase the pitch of a sound, this means that for any finite initial delay Mmax, M[n] will eventually reach 0, at which point it will no longer be possible to maintain the pitch shift. The second consideration is that computer systems have finite amounts of memory.
The process is repeated periodically, alternately pressing each flange. 40 Audio Effects: Theory, Implementation and Application If too much delay accumulates between the machines, the mixed output will no longer be heard as a single signal but as two distinct copies. , only a few milliseconds in each direction, so the result is heard as a single sound rather than two separate sounds. The flanging effect has been described as a kind of “whoosh” that passes through the sound. The effect has also been compared to the sound of a jet passing overhead, in that the direct signal and the reflection from the ground arrive at a varying relative delay.
The seemingly random variations in speed (and hence also pitch) mimic the effect of a singer trying to harmonize with the original. John Lennon loved the effect, and asked George Martin, the Beatles’ producer, to explain it. As Martin recalled, “I knew he’d never understand it, so I said, ‘Now listen, it’s very simple. ’ From that moment on, whenever he wanted it he’d ask for his voice to be ‘flanged,’ or call out for ‘Ken’s flanger’’’ . If the two machines played perfectly in unison, the result would simply be a stronger version of the same signal.
Audio Effects: Theory, Implementation and Application by Joshua D. Reiss, Andrew McPherson