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  2. Voice crossing - Wikipedia

    en.wikipedia.org/wiki/Voice_crossing

    The overlapping occurs because the second note (C) in the lower voice is higher than the first note (B) in the upper voice. It leads to ambiguity, as the ear interprets the step from B to C in one voice, and is fairly consistently avoided in contrapuntal writing. [20] Voice overlaps are common in Bach chorales, but again are discouraged or ...

  3. Overdubbing - Wikipedia

    en.wikipedia.org/wiki/Overdubbing

    Overdubbing (also known as layering) [1] is a technique used in audio recording in which audio tracks that have been pre-recorded are then played back and monitored, while simultaneously recording new, doubled, or augmented tracks onto one or more available tracks of a digital audio workstation (DAW) or tape recorder. [2]

  4. PSOLA - Wikipedia

    en.wikipedia.org/wiki/PSOLA

    PSOLA (Pitch Synchronous Overlap and Add) is a digital signal processing technique used for speech processing and more specifically speech synthesis. It can be used to modify the pitch and duration of a speech signal. It was invented around 1986. [2] PSOLA works by dividing the speech waveform in small overlapping segments.

  5. Variable Control Voice Actuator - Wikipedia

    en.wikipedia.org/wiki/Variable_Control_Voice...

    The term Variable Control Voice Actuator (VCVA) refers to a digital recording technology developed by Olympus, which is implemented in many of their digital voice recorders. [1] It prevents the recording of silence, so pauses in a speaker's dictation do not waste time, power or recording space.

  6. Audio time stretching and pitch scaling - Wikipedia

    en.wikipedia.org/wiki/Audio_time_stretching_and...

    Slowing down the recording to increase duration also lowers the pitch, while speeding it up for a shorter duration respectively raises the pitch, creating the so-called Chipmunk effect. When resampling audio to a notably lower pitch, it may be preferred that the source audio is of a higher sample rate, as slowing down the playback rate will ...

  7. Voice exchange - Wikipedia

    en.wikipedia.org/wiki/Voice_exchange

    Voice exchange gradually died out after 1300, due to the gradual separation of voice ranges and the expansion of the ambitus of a composition. [4] However, it occasionally made limited appearances in simple polyphony of the fifteenth and sixteenth centuries and was, for example, common in the upper parts of Baroque trio sonatas .

  8. Sound recording and reproduction - Wikipedia

    en.wikipedia.org/wiki/Sound_recording_and...

    Frances Densmore and Blackfoot chief Mountain Chief working on a recording project of the Bureau of American Ethnology (1916).. Sound recording and reproduction is the electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects.

  9. Mel-frequency cepstrum - Wikipedia

    en.wikipedia.org/wiki/Mel-frequency_cepstrum

    Map the powers of the spectrum obtained above onto the mel scale, using triangular overlapping windows or alternatively, cosine overlapping windows. Take the logs of the powers at each of the mel frequencies. Take the discrete cosine transform of the list of mel log powers, as if it were a signal. The MFCCs are the amplitudes of the resulting ...

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