GB1404909A - Dc keyed high low select preference system for polyphonic electrical musical instruments - Google Patents
Dc keyed high low select preference system for polyphonic electrical musical instrumentsInfo
- Publication number
- GB1404909A GB1404909A GB3203573A GB3203573A GB1404909A GB 1404909 A GB1404909 A GB 1404909A GB 3203573 A GB3203573 A GB 3203573A GB 3203573 A GB3203573 A GB 3203573A GB 1404909 A GB1404909 A GB 1404909A
- Authority
- GB
- United Kingdom
- Prior art keywords
- output line
- ground
- key
- circuits
- highest
- 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
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
- G10H1/18—Selecting circuits
- G10H1/22—Selecting circuits for suppressing tones; Preference networks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S84/00—Music
- Y10S84/02—Preference networks
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electrophonic Musical Instruments (AREA)
Abstract
1404909 Electrophonic musical instrument HAMMOND CORP 5 July 1973 [17 July 1972] 32035/73 Heading G5J To provide means of selecting the highest and/or lowest notes being played simultaneously on a group of keys, with the facilities for envelope shaping and economical key switching that DC keying allows, a key switch 14 for each note applies on closure line voltage 16 to its associated transistor A, B, C ... N, switching it into a conductive state and thus allowing the appropriate AC tone signal 20 to be fed to the output line 24-38. The transistors A-N for successive notes are connected to the output line at points separated by equal resistors 28-34; at each end of the line high input-impedance preamplifiers 26, 40 fed via similar resistors 22, 36 pass the signals to the instrument curcuits. The input impedance of each preamplifier is ten or more times the sum of all the output line resistances 22-36; each of these resistors being much higher than the resistance 18 to ground across its signal source 20. Any source keyed then has a very low impedance to ground as seen by a signal entering the output line from any other source; the only signals not short circuited to ground by other sources and able to reach the respective pre-amplifiers are the highest and lowest sources keyed at any one time. To sustain notes after their keys are released, capacitors may be connected between the lever sides 15 of the keyswitch contacts and ground, so holding the transistors conducting for a period after key release, during which external envelope shaping circuits may be active. Conventional circuits may be added to suppress a note being sustained as soon as further keys are pressed. The circuit may be used with only one preamplifier, connected to the appropiate end of the output line to identify either the highest or the lowest key pressed. Lines 15 allow other circuits in the instrument to be operated by the key switches 14, unaffected by the circuits of the invention.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27243772A | 1972-07-17 | 1972-07-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1404909A true GB1404909A (en) | 1975-09-03 |
Family
ID=23039789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3203573A Expired GB1404909A (en) | 1972-07-17 | 1973-07-05 | Dc keyed high low select preference system for polyphonic electrical musical instruments |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3766305A (en) |
| JP (1) | JPS5620559B2 (en) |
| AU (1) | AU5769573A (en) |
| BR (1) | BR7305346D0 (en) |
| CA (1) | CA993235A (en) |
| DE (1) | DE2336425A1 (en) |
| GB (1) | GB1404909A (en) |
| IT (1) | IT991252B (en) |
| NL (1) | NL7309761A (en) |
| ZA (1) | ZA734526B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3921491A (en) * | 1973-04-25 | 1975-11-25 | Alfred B Freeman | Bass system for automatic root fifth and pedal sustain |
| JPS5056924A (en) * | 1973-09-14 | 1975-05-19 | ||
| US4016792A (en) * | 1974-03-04 | 1977-04-12 | Hammond Corporation | Monophonic electronic musical instrument |
| JPS50123454A (en) * | 1974-03-15 | 1975-09-27 | ||
| US4065993A (en) * | 1974-12-26 | 1978-01-03 | Nippon Gakki Seizo Kabushiki Kaisha | Electronic organ with a three-finger chord and one-finger automatic chord playing mode selector |
| JPS5233516A (en) * | 1975-09-08 | 1977-03-14 | Roorand Kk | Selection circuit for giving priority to low and high tones |
| JPS5355018A (en) * | 1976-10-28 | 1978-05-19 | Nippon Gakki Seizo Kk | Electric musical instrument |
| US4186637A (en) * | 1977-09-22 | 1980-02-05 | Norlin Industries, Inc. | Tone generating system for electronic musical instrument |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2429226A (en) * | 1942-09-14 | 1947-10-21 | Hammond Instr Co | Electrical musical instrument |
| US2468062A (en) * | 1944-12-23 | 1949-04-26 | Hammond Insturment Company | Electrical musical instrument |
| US2710555A (en) * | 1948-12-28 | 1955-06-14 | Martin Constant | Electronic musical instrument |
| US2645968A (en) * | 1950-06-23 | 1953-07-21 | Hammond Instr Co | Electrical musical instrument |
| US2933004A (en) * | 1952-08-29 | 1960-04-19 | Hammond Organ Co | Combined piano and electrical monophonic instrument |
| US2874286A (en) * | 1955-07-29 | 1959-02-17 | Estey Organ Corp | Preference network |
| US3051032A (en) * | 1959-03-18 | 1962-08-28 | Hammond Organ Co | Single manual double countermelody electrical musical instrument |
| US3247310A (en) * | 1962-09-13 | 1966-04-19 | Chicago Musical Instr Co | Musical instrument |
| AT240144B (en) * | 1963-11-07 | 1965-05-10 | Wolfgang Dipl Ing Wehrmann | Electronic keyboard instrument |
| US3283057A (en) * | 1964-06-26 | 1966-11-01 | Seeburg Corp | Keyboard oscillator circuit |
| GB1120065A (en) * | 1964-08-17 | 1968-07-17 | Joh. Mustad Ab | |
| US3417188A (en) * | 1965-06-23 | 1968-12-17 | Baldwin Co D H | Preference circuit for electronic musical instrument utilizing pulse amplitude discrimination and zero-crossing detector |
| US3470306A (en) * | 1965-07-01 | 1969-09-30 | Baldwin Co D H | Bass register keying system |
| US3395242A (en) * | 1965-07-08 | 1968-07-30 | Baldwin Co D H | Preference circuit |
| US3476864A (en) * | 1966-03-09 | 1969-11-04 | Baldwin Co D H | Electronic organ reiteration system utilizing a zero-crossing preference circuit |
| US3509262A (en) * | 1966-07-11 | 1970-04-28 | Baldwin Co D H | Bass register keying system employing preference networks |
| US3511917A (en) * | 1967-04-10 | 1970-05-12 | Seeburg Corp | Voltage selection arrangement wherein same contacts switch selectable d.c. pitch potential and constant a.c. for control function |
| US3538804A (en) * | 1968-06-06 | 1970-11-10 | Hammond Organ Co | Electronic solo instrument having high-note guard circuit |
| US3567838A (en) * | 1969-11-12 | 1971-03-02 | Hammond Corp | Musical instrument rhythm system having provision for introducing automatically selected chord components |
| JPS5023982B1 (en) * | 1970-11-29 | 1975-08-12 | ||
| US3665089A (en) * | 1970-12-17 | 1972-05-23 | Tonus Inc | Music synthesizer keyboard |
-
1972
- 1972-07-17 US US00272437A patent/US3766305A/en not_active Expired - Lifetime
-
1973
- 1973-07-03 ZA ZA734526A patent/ZA734526B/en unknown
- 1973-07-04 AU AU57695/73A patent/AU5769573A/en not_active Expired
- 1973-07-04 CA CA175,644A patent/CA993235A/en not_active Expired
- 1973-07-05 GB GB3203573A patent/GB1404909A/en not_active Expired
- 1973-07-12 IT IT26526/73A patent/IT991252B/en active
- 1973-07-13 DE DE19732336425 patent/DE2336425A1/en active Pending
- 1973-07-13 NL NL7309761A patent/NL7309761A/xx not_active Application Discontinuation
- 1973-07-17 JP JP8000573A patent/JPS5620559B2/ja not_active Expired
- 1973-07-17 BR BR5346/73A patent/BR7305346D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL7309761A (en) | 1974-01-21 |
| ZA734526B (en) | 1974-06-26 |
| DE2336425A1 (en) | 1974-01-31 |
| JPS4959626A (en) | 1974-06-10 |
| AU5769573A (en) | 1975-01-09 |
| BR7305346D0 (en) | 1974-09-05 |
| IT991252B (en) | 1975-07-30 |
| JPS5620559B2 (en) | 1981-05-14 |
| US3766305A (en) | 1973-10-16 |
| CA993235A (en) | 1976-07-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |