How does Change AIFF Speed change the playback rate?
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Concretely, the time-stretch is applied to the PCM directly and written back losslessly, which is why a lossless source is the right input for anything above about 1.5x where artefacts start to show. Choose a multiplier — 0.5x for half speed, 2x for double — and the whole file is retimed.
Will speeding it up make voices sound high-pitched?
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No. The time-stretch preserves pitch, so a 1.5x speech track sounds like the same person talking faster rather than like a chipmunk. That is the difference between a proper time-stretch and simply playing the samples faster.
Does the source format affect the result?
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It does. AIFF is Apple's uncompressed PCM format — the Mac-side equivalent of WAV, same size, same fidelity. That determines whether the retimed result can be written back cheaply or has to be fully re-encoded.
Anything specific to AIFF here?
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Yes — AIFF is big-endian PCM where WAV is little-endian; the audio is equivalent, and the choice is really about which ecosystem opens it without complaint. Worth knowing before you commit to a large speed change.
How far can I push the speed before it sounds wrong?
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Roughly 0.75x to 2x is transparent for speech. Beyond about 2.5x the stretch artefacts become audible on any algorithm, and below 0.5x the reconstruction has to invent too much. Music tolerates far less than speech does.
Does the file get shorter, and does it get smaller?
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Shorter, yes, and in exact proportion — an hour of audio at 1.5x is forty minutes. The file shrinks by roughly the same proportion because there is less material to encode. The bitrate, the sample rate and the channel layout are all left exactly as they were.
Na e sebetsa ho lisebelisoa tsa mohala
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E, sesebelisoa sa rona sa ho fetolela se arabela ka botlalo 'me se sebetsa ho li-smartphone le matlapa. U ka fetola lifaele ho iOS, Android, le sethala sefe kapa sefe sa mohala ka sebatli sa sejoale-joale.
Ke li-browser life tse tšehetsoang
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Sesebelisoa sa rona sa ho fetolela se sebetsa le libatli tsohle tsa sejoale-joale ho kenyeletsoa Chrome, Firefox, Safari, Edge le Opera. Re khothaletsa ho boloka sebatli sa hau se ntlafalitsoe bakeng sa boiphihlelo bo botle ka ho fetisisa.
Na lifaele tsa ka li bolokoa e le lekunutu ebile li sireletsehile?
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Ehlile. Lifaele tsa hau li sebetsoa ka mokhoa o sireletsehileng le o hlakolwang ka boiketsetso ho tsoa ho li-server tsa rona kamora ho fetolela. Ha re bale, ha re boloke, kapa ha re arolelane litaba tsa lifaele tsa hau. Liphetisetso tsohle li sebelisa likhokahano tsa HTTPS tse patiloeng.
Ho thoe'ng haeba download ea ka e sa qale
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Haeba ho jarolla ha hao ho sa qale ka bohona, leka ho tobetsa konopo ea ho jarolla hape. Etsa bonnete ba hore li-pop-up ha lia thibeloa, 'me u hlahlobe foldara ea ho jarolla ea sebatli sa hau. U ka boela ua tobetsa sehokelo sa ho jarolla ka ho le letona ebe u khetha 'Boloka Joaloka'.
Na boleng bo tla bolokoa?
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Boleng ba video bo lula bo sa senyeha nakong ea ts'ebetso nakong ea phetoho. Liphetho li ipapisitse le ho lumellana ha faele ea mohloli le sebopeho sa sepheo.
Na ke hloka ho theha ak'haonte?
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Ha ho hlokahale ak'haonte bakeng sa tšebeliso ea motheo. U ka sebetsana le lifaele hang-hang. Ho theha ak'haonte ea mahala ho u fa phihlello ea nalane ea hau ea phetoho le likarolo tse ling.
