GB1303867A - - Google Patents
Info
- Publication number
- GB1303867A GB1303867A GB1526370A GB1526370A GB1303867A GB 1303867 A GB1303867 A GB 1303867A GB 1526370 A GB1526370 A GB 1526370A GB 1526370 A GB1526370 A GB 1526370A GB 1303867 A GB1303867 A GB 1303867A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- variable
- signals
- modulation
- phase
- 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.)
- Expired
Links
- 230000005355 Hall effect Effects 0.000 abstract 1
- UHYPYGJEEGLRJD-UHFFFAOYSA-N cadmium(2+);selenium(2-) Chemical compound [Se-2].[Cd+2] UHYPYGJEEGLRJD-UHFFFAOYSA-N 0.000 abstract 1
- 230000002301 combined effect Effects 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
- G10H1/04—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos by additional modulation
- G10H1/043—Continuous modulation
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/02—Means for controlling the tone frequencies, e.g. attack or decay; Means for producing special musical effects, e.g. vibratos or glissandos
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H2210/00—Aspects or methods of musical processing having intrinsic musical character, i.e. involving musical theory or musical parameters or relying on musical knowledge, as applied in electrophonic musical tools or instruments
- G10H2210/155—Musical effects
- G10H2210/195—Modulation effects, i.e. smooth non-discontinuous variations over a time interval, e.g. within a note, melody or musical transition, of any sound parameter, e.g. amplitude, pitch, spectral response or playback speed
- G10H2210/201—Vibrato, i.e. rapid, repetitive and smooth variation of amplitude, pitch or timbre within a note or chord
- G10H2210/211—Pitch vibrato, i.e. repetitive and smooth variation in pitch, e.g. as obtainable with a whammy bar or tremolo arm on a guitar
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Stereophonic System (AREA)
- Electrophonic Musical Instruments (AREA)
- Networks Using Active Elements (AREA)
Abstract
1303867 Processing audio frequency signals MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 31 March 1970 [27 March 1969] 15263/70 Heading G5J [Also in Divisions H3 and H4] Audio frequency signals, e.g. tone signals in an electronic musical instrument are separated into frequency bands and the higher frequency bands are phase modulated at a sub-audio frequency before being recombined to provide vibrato without undesirable beats in the bass. Alternatively, amplitude modulation may be used. The separated signals in each of the higher frequency bands on leads 82, 83 are separated by coupling means 120, 121 which may be direct connections and modulated with modulation depth increasing with frequency in modulators 122-125 provided with modulating voltages of different phases and frequencies which increase with the input frequency, possibly stepwise. The signals pass via amplifiers 131-136 to speakers 141-146 and/or to a single amplifier 137 and speaker 147 and their combined effect is to produce a vibrato in frequency and amplitude. The input may be connected to an electronic musical instrument or a tape or disc recording. The modulation depth, or modulation frequency versus input frequency curves may be stepped or continuous, Figs. 2, 3 (not shown). The modulators (122- 123), Fig. 4 (not shown), provide signals modulated in opposite phase which are fed to speakers (148; 149) respectively, the speakers also receiving signals from lead (81). In Fig. 6 (not shown), only one modulator (122) is provided, and its output is mixed with an unmodulated signal of the same frequency both of which are fed to speaker (147). The modulators may be delay lines of variable delay characteristics giving a phase deviation characteristic shown in Fig. 9 (not shown) or a transistor may have equal emitter and collector resistors, connected to an output (330), Fig. 12 (not shown), via a variable resistance, and a variable capacitance, respectively, modulation being obtained by varying either the capacity or resistance at modulating frequency, giving the deviation characteristic shown in Fig. 11 a valve, or FET or transformer may be used instead of a transistor, and a variable inductance may be used to obtain modulation. A number of such circuits may be connected in cascade, Fig. 15 (not shown), to increase either the maximum phase deviation, Fig. 17 (not shown), or increase the frequency range over which the deviation is substantial, Fig. 20 (not shown), by suitable choice of time constant of the variable network in each circuit. Variable resistors R, Fig. 12 (not shown), R 1 , R 2 , R 3 , Fig. 15 (not shown), may utilize the Hall effect, or be light sensitive for example made of CdS or CdSe, and illuminated by a lamp supplied with alternating current at modulation frequency, and variable phase, superposed on a direct current to set the mean value of resistance, Fig. 14 (not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2371969A JPS5524116B1 (en) | 1969-03-27 | 1969-03-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1303867A true GB1303867A (en) | 1973-01-24 |
Family
ID=12118122
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1526370A Expired GB1303867A (en) | 1969-03-27 | 1970-03-31 |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS5524116B1 (en) |
DE (1) | DE2015500C3 (en) |
FR (1) | FR2035936A1 (en) |
GB (1) | GB1303867A (en) |
NL (1) | NL7004213A (en) |
ZA (1) | ZA702084B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3718871A (en) * | 1970-07-29 | 1973-02-27 | Matsushita Electric Ind Co Ltd | Phase modulating device |
CN113325657B (en) * | 2021-08-03 | 2021-11-30 | 杭州中科极光科技有限公司 | Projection system, projection display method and terminal equipment |
-
1969
- 1969-03-27 JP JP2371969A patent/JPS5524116B1/ja active Pending
-
1970
- 1970-03-24 NL NL7004213A patent/NL7004213A/xx not_active Application Discontinuation
- 1970-03-24 DE DE2015500A patent/DE2015500C3/en not_active Expired
- 1970-03-26 FR FR7010948A patent/FR2035936A1/fr active Pending
- 1970-03-26 ZA ZA702084A patent/ZA702084B/en unknown
- 1970-03-31 GB GB1526370A patent/GB1303867A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5524116B1 (en) | 1980-06-26 |
FR2035936A1 (en) | 1970-12-24 |
ZA702084B (en) | 1971-01-27 |
DE2015500A1 (en) | 1970-12-23 |
DE2015500B2 (en) | 1973-10-25 |
NL7004213A (en) | 1970-09-29 |
DE2015500C3 (en) | 1974-06-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PE20 | Patent expired after termination of 20 years |