FR2451669A1 - Dispositif de traitement de la forme d'un signal periodique et application notamment a un instrument de musique electronique - Google Patents
Dispositif de traitement de la forme d'un signal periodique et application notamment a un instrument de musique electroniqueInfo
- Publication number
- FR2451669A1 FR2451669A1 FR7906749A FR7906749A FR2451669A1 FR 2451669 A1 FR2451669 A1 FR 2451669A1 FR 7906749 A FR7906749 A FR 7906749A FR 7906749 A FR7906749 A FR 7906749A FR 2451669 A1 FR2451669 A1 FR 2451669A1
- Authority
- FR
- France
- Prior art keywords
- counter
- pilot frequency
- signal processor
- intervals
- musical instrument
- 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.)
- Granted
Links
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
- G10H7/00—Instruments in which the tones are synthesised from a data store, e.g. computer organs
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/02—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform
- H03K4/026—Generating pulses having essentially a finite slope or stepped portions having stepped portions, e.g. staircase waveform using digital techniques
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
LA PRESENTE INVENTION A POUR OBJET UN DISPOSITIF DE TRAITEMENT DE LA FORME D'UN SIGNAL PERIODIQUE. IL COMPORTE PRINCIPALEMENT:-UN COMPTEUR A CYCLES PERTURBES C, RECEVANT UNE FREQUENCE PILOTE F ET PERMETTANT DE COMPTER A CHACUN DE SES CYCLES UN NOMBRE P OU P A DE PERIODES DE LA FREQUENCE PILOTE F;-UNE MEMOIRE B DANS LAQUELLE SONT STOCKEES LES VALEURS DU NOMBRE P, FOURNISSANT CES DERNIERES AU COMPTEUR PRECEDENT C;-UN COMPTEUR AUXILIAIRE C, MODULO M, RELIE AU COMPTEUR C ET FOURNISSANT A LA FOIS LA FREQUENCE F DU SIGNAL RECHERCHE DANS UNE OCTAVE DE REFERENCE, LA PERIODE T CORRESPONDANT A F ETANT EGALE A LA DUREE DE M CYCLES, ET UNE INFORMATION DE CONTROLE M;-DES MOYENS DE COMMANDE C DU COMPTEUR C, RECEVANT L'INFORMATION DE CONTROLE M ET ASSURANT LE CHOIX ENTRE LES NOMBRES P ET P . L'INVENTION EST NOTAMMENT APPLICABLE AUX INSTRUMENTS DE MUSIQUE ELECTRONIQUES.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7906749A FR2451669A1 (fr) | 1979-03-16 | 1979-03-16 | Dispositif de traitement de la forme d'un signal periodique et application notamment a un instrument de musique electronique |
IT8012479A IT1136153B (it) | 1979-03-16 | 1980-03-14 | Dispositivo di trattamento della forma di un segnale per periodico ed applicazione in particolare ad uno strumento di musica elettronico |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7906749A FR2451669A1 (fr) | 1979-03-16 | 1979-03-16 | Dispositif de traitement de la forme d'un signal periodique et application notamment a un instrument de musique electronique |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2451669A1 true FR2451669A1 (fr) | 1980-10-10 |
FR2451669B1 FR2451669B1 (fr) | 1982-09-03 |
Family
ID=9223217
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7906749A Granted FR2451669A1 (fr) | 1979-03-16 | 1979-03-16 | Dispositif de traitement de la forme d'un signal periodique et application notamment a un instrument de musique electronique |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2451669A1 (fr) |
IT (1) | IT1136153B (fr) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2122188A5 (fr) * | 1971-01-12 | 1972-08-25 | Lucas Industries Ltd | |
US3818354A (en) * | 1971-11-12 | 1974-06-18 | Nippon Musical Instruments Mfg | Pulse frequency dividing circuit |
US3824379A (en) * | 1971-12-30 | 1974-07-16 | Nippon Gakki Siezo Kk | Variable frequency dividing circuit |
US3959737A (en) * | 1974-11-18 | 1976-05-25 | Engelmann Microwave Co. | Frequency synthesizer having fractional frequency divider in phase-locked loop |
US4084082A (en) * | 1976-10-12 | 1978-04-11 | Fairchild Camera And Instrument Corporation | Programmable counter |
-
1979
- 1979-03-16 FR FR7906749A patent/FR2451669A1/fr active Granted
-
1980
- 1980-03-14 IT IT8012479A patent/IT1136153B/it active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2122188A5 (fr) * | 1971-01-12 | 1972-08-25 | Lucas Industries Ltd | |
US3818354A (en) * | 1971-11-12 | 1974-06-18 | Nippon Musical Instruments Mfg | Pulse frequency dividing circuit |
US3824379A (en) * | 1971-12-30 | 1974-07-16 | Nippon Gakki Siezo Kk | Variable frequency dividing circuit |
US3959737A (en) * | 1974-11-18 | 1976-05-25 | Engelmann Microwave Co. | Frequency synthesizer having fractional frequency divider in phase-locked loop |
US4084082A (en) * | 1976-10-12 | 1978-04-11 | Fairchild Camera And Instrument Corporation | Programmable counter |
Non-Patent Citations (1)
Title |
---|
EXBK/71 * |
Also Published As
Publication number | Publication date |
---|---|
IT8012479A0 (it) | 1980-03-14 |
FR2451669B1 (fr) | 1982-09-03 |
IT1136153B (it) | 1986-08-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |