GB2175732A - Altering speed of music - Google Patents

Altering speed of music Download PDF

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Publication number
GB2175732A
GB2175732A GB08513851A GB8513851A GB2175732A GB 2175732 A GB2175732 A GB 2175732A GB 08513851 A GB08513851 A GB 08513851A GB 8513851 A GB8513851 A GB 8513851A GB 2175732 A GB2175732 A GB 2175732A
Authority
GB
United Kingdom
Prior art keywords
music
time
speed
changing
predetermined interval
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB08513851A
Other versions
GB8513851D0 (en
Inventor
Roger Paul Haywood
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB08513851A priority Critical patent/GB2175732A/en
Publication of GB8513851D0 publication Critical patent/GB8513851D0/en
Publication of GB2175732A publication Critical patent/GB2175732A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/00007—Time or data compression or expansion
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/005—Reproducing at a different information rate from the information rate of recording
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • G11B2220/91—Helical scan format, wherein tracks are slightly tilted with respect to tape direction, e.g. VHS, DAT, DVC, AIT or exabyte
    • G11B2220/913—Digital audio tape [DAT] format

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

A method of changing the speed of music comprising encoding the music into digital form such that a digital signal represents the structure of the waveform of the music played during a predetermined interval of time, converting the digital signals into a converter before playback such that the waveform of the music during a predetermined number of time intervals are played back for a period greater or less than the predetermined interval of time.

Description

SPECIFICATION Altering speed of music Field of the Invention The invention relates to a method of changing the speed of music, without effectively changing the pitch of the music.
One problem that arises often in modern recording studios is that it is impossible to change the speed of a track without altering the pitch of the music recorded thereon. Thus, for example, if the backing to music is recorded at one location and then sent to another location for recording of the singer, it is impossible for the background speed to be altered to help the singer without changing the pitch of the music. The method usually used to change the speed of the music is merely to change the drive which drives the tape which plays back the music.
Summary of the Invention According to the invention there is provided a method of changing the speed of music comprising encoding the music into digital form such that a digital signal represents the structure of the waveform of the music played during a predetermined interval of time, converting the digital signals into a converter before playback such that the waveform of the music during a predetermined number of time intervals are played back for a period greater or less than the predetermined interval of time.
The predetermined interval of time is very small, for example, a millisecond. The music is split into millisecond slices with a digital signal representing the music during each millisecond. The music is played back where some of the slices are played for double or half the time. This effectively speeds up or slows down the music without changing the pitch.
Alternatively, gaps of silence may be introduced of, for example, a millisecond length into the playback of the music. The length of time periods will be so tiny that they will not be distinguishable by the ear but will effectively slow down the music.
Means for encoding the music into digital form and the converter will be apparent to the intended skilled addressee of the specification without requiring any inventive thought.
1. A method of changing the speed of music comprising encoding the music into digital form such that a digital signal represents the structure of the waveform of the music played during a predetermined interval of time, converting the digital signals into a converter before playback such that the waveform of the music during a predetermined number of time intervals are played back for a period greater or less than the predetermined interval of time.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (1)

  1. **WARNING** start of CLMS field may overlap end of DESC **.
    SPECIFICATION Altering speed of music Field of the Invention The invention relates to a method of changing the speed of music, without effectively changing the pitch of the music.
    One problem that arises often in modern recording studios is that it is impossible to change the speed of a track without altering the pitch of the music recorded thereon. Thus, for example, if the backing to music is recorded at one location and then sent to another location for recording of the singer, it is impossible for the background speed to be altered to help the singer without changing the pitch of the music. The method usually used to change the speed of the music is merely to change the drive which drives the tape which plays back the music.
    Summary of the Invention According to the invention there is provided a method of changing the speed of music comprising encoding the music into digital form such that a digital signal represents the structure of the waveform of the music played during a predetermined interval of time, converting the digital signals into a converter before playback such that the waveform of the music during a predetermined number of time intervals are played back for a period greater or less than the predetermined interval of time.
    The predetermined interval of time is very small, for example, a millisecond. The music is split into millisecond slices with a digital signal representing the music during each millisecond. The music is played back where some of the slices are played for double or half the time. This effectively speeds up or slows down the music without changing the pitch.
    Alternatively, gaps of silence may be introduced of, for example, a millisecond length into the playback of the music. The length of time periods will be so tiny that they will not be distinguishable by the ear but will effectively slow down the music.
    Means for encoding the music into digital form and the converter will be apparent to the intended skilled addressee of the specification without requiring any inventive thought.
    1. A method of changing the speed of music comprising encoding the music into digital form such that a digital signal represents the structure of the waveform of the music played during a predetermined interval of time, converting the digital signals into a converter before playback such that the waveform of the music during a predetermined number of time intervals are played back for a period greater or less than the predetermined interval of time.
GB08513851A 1985-06-01 1985-06-01 Altering speed of music Withdrawn GB2175732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08513851A GB2175732A (en) 1985-06-01 1985-06-01 Altering speed of music

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08513851A GB2175732A (en) 1985-06-01 1985-06-01 Altering speed of music

Publications (2)

Publication Number Publication Date
GB8513851D0 GB8513851D0 (en) 1985-07-03
GB2175732A true GB2175732A (en) 1986-12-03

Family

ID=10580026

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08513851A Withdrawn GB2175732A (en) 1985-06-01 1985-06-01 Altering speed of music

Country Status (1)

Country Link
GB (1) GB2175732A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005096300A1 (en) * 2004-03-19 2005-10-13 Thomson Licensing Method and apparatus for adapting the speed or pitch of replayed or received digital audio signals having a given speed or pitch, or for marking digitally encoded audio signals having a given speed or pitch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005096300A1 (en) * 2004-03-19 2005-10-13 Thomson Licensing Method and apparatus for adapting the speed or pitch of replayed or received digital audio signals having a given speed or pitch, or for marking digitally encoded audio signals having a given speed or pitch

Also Published As

Publication number Publication date
GB8513851D0 (en) 1985-07-03

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)