DD201737A5 - BASE PART FOR A ACCORDION - Google Patents

Abstract

The bass part of an accordion is provided for playing both basses, chords (mono- or polyphonic) as well as Einzeleltoenen with a switching from chord to single-tone play in the form of a rocker, which is a variety of pivotable about a game axis, the individual Clavishebeln assigned and these pressing playing levers bear on which in the single-tone play all the button-sliders of the chord-work directly attack all the clavis-levers, while for the chord-play finger-shifters, which over d. Button slider are operable, attack directly on levers for the chord game. The rocker is in this case pivotable about a switching axis and thus switchable.

Description

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Bass part for an accordion Field of application of the invention

Accordions have bass parts with which it is possible to play basses and / or chords and / or single notes depending on the design of the bass section.

Characteristic of the known technical solutions ,

From the German patent application 20 06 530 a bass part is known in which a switch between chord and single-tone game can be made via a register, while for the bass and chord as well as for the single-tone play separate vocal cords are provided. Button sliders used for the single-tone game are also intended for the chord game, however, the respectively not required air holes in the bass are closed by the register, so that once only chord and another time only single tone can be played. Such an arrangement has the disadvantage that the sound range must remain very limited if the instrument is to remain handy, since the reeds for the individual tones must be provided separately from the rest.

Furthermore, accordions are known in which the switching device is a switching rake, which has a poor accessibility, requires a complicated assembly and pressed button while the button keyboard

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of the instrument can lead to considerable switching disturbances. For this reason, it was tried / install a switching lock, so that can be switched only when not pressed game buttons, but this leads, among other fixtures to longer unwanted game breaks.

> · », In addition, accordions are known that are not through

running or only polyphonic or from octave to octave are playable in different tunes.

Object of the invention

; The aim of the invention is to allow a versatile playing of the bass part while low design and therefore manufacturing effort.

Explanation of the essence of the invention

The object of the invention is to provide a bass section for an accordion, in which all tones can be used continuously for single or zweichörig also for single-tone performance and a kon ~ V structurally simple switching device on ^: ,. ; . ''. ''. '. ^: assigns.'. •. ...:. ^: '·. / 7.'''

The invention therefore relates to a bass part for an accordion for playing bass, chords and single tones, with a bass case, in which a bass filling is arranged, - which carries a plurality of voice sticks and these associated with air holes through

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Clavishebel operable louvers are closable, the Clavishebel for the basses via associated button slide are movable, which are part of a bass movement, while the clavis levers for the chords are movable via associated button or finger slide, which are part of a piecework, with button slide associated with Clavishebeln for louvers are arranged for the single-tone performance in the chord and a switching from chords to single-tone game is provided / wherein the switching means comprises a switching axis ¹ between a first and a second position "switchable rocker, a plurality of pivotable about a game axis , the individual Clavishebeln assigned and these actuated game lever wearing, in which attack in the first position for the single-tone performance all the pushers of the chord works for operating all Clavishebel directly, while in the second position for the chord game Finger slide, which are operable via the button slide, attack directly on game levers, which are assigned to the Clavishebeln for the chord game.

By pressing the switching direction, the system of the play lever of the rocker is changed against the button slide (the chord button rows), so that, for example, four chord rows (for major, minor, seventh and diminished seventh chords) to four rows C or B handle with be switched chromatic tone sequence. The standard basses (third and bottom basses) remain in their fifth arrangement.

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However, they can also be played in the single-tone performance over the four chord rows and the rocker, so that all tones can be played in the single-tone game, whereby the sound range of the instrument is significantly expanded.

The rocker allows the formation of a simple combined into assemblies mechanics, the individual assemblies are separated as a whole removable.

It is expedient here if the rocker consists of a frame in which the play levers are arranged to be pivotable parallel to each other about the play axis. , ·. ^: . , .V:. - ".;:

The actuation of the Ciavishebel for Sekundärehen serving levers can be connected to the associated Ciavishebeln each via a hinge.

The hinge may consist of a body attached to the clavis lever, consisting of two part-bodies separated by a slot leaving only a narrow movable web, a part-body being connected to the play lever. The joint may also be articulated in the indexing axis of the rocker on the game lever. The joint can also have a connecting rod attached to the body of the joint

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be hinged to the game lever.

The switching means may comprise manually operable, arranged on the outside of the bass-handle board switching buttons, which are connected via a sliding bar on the inside of the bass-operating board with each other and a linkage with the rocker. The linkage may be a toggle linkage. :

Further, by the button slide for the bass operated finger slide in the second pot position of the rocker with the associated game levers for playing polychoral basses are engaged.

The finger slides for the bass clavis levers can be actuated by means of slide valves which, in the first position of the rocker, engage with associated levers.

Needed for the chord game finger slide, which attack in the second position of the rocker on the associated game levers can be actuated by finger slide, which are arranged in the chord, while the voltage applied to the game levers finger slide are arranged in the bass movement. ; ..: * ': ·.' ; ' :. 'o. ·. . "-. '':: ''. ' :

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- 6. -

For playing intermediate basses can be provided in the first position of the rocker with associated game levers engaged, acting directly on the associated CIayishebufe pusher.

Bass and chord work can be individually and independently of the rocker removable modules.

The bass fill may have a trough-shaped recess in which the secondary-stage louvers are received, the louvers belonging to the bass-banks being arranged in a plane offset therefrom, with the Ciavishebel arranged in a stepped manner.

· .... '''' S - ''. : ': '. , '. '' ^:: '; / !. ".. ..".

A baritone cassotto can be placed over the area of the louvers.

The Ciavishebel for the basses can be stored on the baritone cassotto.

A bass Cassotto can be arranged above the louvers for the basses.

The bass Cassotto can carry the bass movement and the chord work. _^:; '. , ... .-; ; ·: ';^;; -. ' ... '^"-;.' '.''''' ^:

The bass horn can carry a hood over the bass tune plates.

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The bass-reeds in the bass-horn can be offset from each other in their distance from the bass to avoid an intonation kink to the subsequent voice post.

The bass enclosure may include an externally adjustable shutter to release openings.

The finger pushers can reach behind the finger pushers in the bass mechanism in the chord work.

embodiment

The invention will be explained in more detail below with reference to an embodiment shown in the accompanying drawings.

Fig. 1 shows in section an embodiment of a bass part. ',,. '"' .. '.,' -: .- \ ^:. ';" : '.,'" . '.-. ·.' ·. '^;·; . '

FIG. 2 shows a front view of an embodiment of a rocker for the bass part of FIG. 1. FIG.

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Fig. 3 shows a partial view of the necessary parts for playing basses.

Fig. 4 shows a partial view of the parts necessary for playing chords.

Fig. 5 shows a partial view of the parts necessary for playing single tones without bass *

6 shows a detail of the parts necessary for playing standard basses as single tones *

Fig. 7 shows a detail of the parts necessary for playing intermediate basses as single tones.

8 shows a joint for connecting play lever in the rocker with associated connecting rods,

Fig. 9 shows an actuating device for the rocker.

The bass case 10 shown in Fig. 1 is airtight connected to a bellows 11, which in turn is connected to a disc portion of the accordion, not shown. The bass enclosure 10 has a button keyboard 12, which consists of six rows I to VI of Spie! Button 13, which is opposite to a

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Handle plate 14 project outwardly stepped.

Adjacent to the bellows 11, within the bass enclosure 10 'is a bassinet 15 which carries three pairs of reed 16, namely a standard 4', 8 'reed pair 16A (comprising twelve notes of one octave) and an intermediate bass (four notes to the four Standard bass subsequent tones comprising), a 8 ', 8' -Veilstockpaar 16B and a 4 ', 4' -Voice stock pair 16 C for the single-tone (baritone), which are also used in sections as ι Sekundreihen for the standard bass. The pairs of prongs 16 project from the bass filling 15 into the space of the bladder 11. The voice sticks 16 have corresponding reed plates with reeds. The pair of prongs 16B and 16C each include 21 tones so that the range of the bass range is, for example, from E to ¹ ".

The bass filling 15 is screwed to corresponding frame parts of the bass case 10 and has the individual chambers of the voice sticks 16 associated air holes 17, which are closed by means of flaps 18A, 18B and 18C for the individual pairs of prongs 16A, 16B, 16C. The flaps 18A, 18B and 18C are actuated via Ciavishebel 19 which are rotatable about a shaft 20. The shaft 20 is received by a bearing ledge 21 which at the same time serves to support a return spring 22 which pushes the flaps 18A, 18B and 18C to the closed position.

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The Ciavishebel 19 are actuated by the game buttons 13 to release the air holes 17 for the purpose of sound production.

In the bass case 10, a sub-frame 23 and an upper frame 24 are arranged one above the other, wherein the sub-frame 23 serves to receive the bass movement and the upper frame 24 for receiving the chord and baritone. The bass mechanism comprises twelve shafts 25 (only one shown by way of example) which extend over the length of the bass case 10 in an equidistant arrangement in one plane and are rotatably mounted in the lower region of the subframe 23. The shafts 25 are provided with shaft pins 26 which extend radially with respect to the shafts 25. Further, the sub-frame 23 receives a series of finger slides 27 which are arranged transversely to the longitudinal direction of the sub-frame 23 in this slidably. The finger slide 27 are provided with driving pins 28 which can be taken by the shaft pins 26 for moving the finger slide 27. In addition, the sub-frame 23 with the play buttons 13 of the series I and II associated button slide 29, which are as the finger slide 27 transversely to the longitudinal direction of the sub-frame 23 slidable in this and also carry driving pins 30, which serve by pressing the play button 13th and the associated displacement of the button slider 29 in the subframe to take along a shaft pin 26. As a result, the associated shaft 25 and thus the remaining shaft pins 26 are rotated. The latter lead to a shift of finger slide 27. The baritone and chord work in the upper frame 24 is so far accordingly.

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The bass side further includes a rocker 31 (see also Fig. 2) consisting of a U-shaped frame 32 rotatably mounted on pins 33 in the bass case 10 extending in the direction of rows I to VI. The pins 33 are located approximately at half the height of the free legs of the frame 32 and define the switching axis of the rocker 31. In the frame 32 is a plurality of spaced play levers 34 parallel to the free legs of the frame 32, which is around a can be pivoted parallel to the central leg of the frame 32 extending game axis 35. The game axis 35 is received by upstanding tabs of a bearing strip 36. The game levers 34 are provided with pivotally attached thereto in the switching axis of the rocker 31 connecting rods 37 which are connected via a hinge 38 each with a free end of a Ciavishebels 19 for the flaps 18 B and 18 C, respectively. By pivoting a game lever 34 about the game axis 35, therefore, the associated pair of flaps 18 B, 18 C is opened.

The rocker 31 is adjustable by means of an externally operable switching device between two positions (see Fig. 1).

In Fig. 3, those parts are shown, which are required when playing the standard bass. Here, the rocker 31 assumes the position shown in dashed lines in Fig. 1 a. In this position are in the rest position twelve finger slide 27a, which have a bent portion 39, with these at the free ends of the Ciavishebel 19 for the twelve tones of the standard bass. Furthermore, there are another twelve Fihgerschieber

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27b, the lugs 40 having bent ends, with the latter to Spielhebelh 34 for the corresponding tones of the associated Sekundreihen. By pressing a play button 13 of the series I or II is on the associated button slide 29 via the driving pins 28 and 30 and the shaft 25 and the shaft pins 26 of the associated finger slide 27 a pressed with the bent portion 39 inwardly, whereby the corresponding Clavishebel 19 for a flap 18A is pivoted to open it. At the same time a finger slide 27b is moved with nose 40 inwardly over the shaft 25 and brings a play lever 34 of the rocker 31 in the dashed position shown in Fig. 3, whereby the Clavishebel 19 are actuated for the associated flaps 18B, 18C of the secondary rows. After releasing the play button 13, the provision is made via the return springs 22 of the Ciavishebel 19th

Whether the bass tones are played singly or polychrome, or whether only the second or the second sounds sound is adjustable via a register, the pusher 41 are arranged adjacent to the rows I to VI of the game buttons 13. The pushers 41 actuate a register switching mechanism 42, which serves for adjusting register slides, with which the air holes 17 are to be closed and opened accordingly.

In Fig. 4, those parts are shown, which are needed when playing chords. Here, the rocker 31 also assumes the position of Fig. 3. The chords are played by means of buttons 13 of the series III

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bis'.VI played / major, minor, seventh and diminished seventh chords can be played, which are composed of three notes. By pressing a to be used for playing chords Spijelknopfes 13, the three associated shafts 25 are rotated by the associated button slide 29, whereby corresponding three finger slide 27c are moved in the upper frame 24 in accordance with the desired chord inward. The finger slide 27 c each have a downwardly directed nose 44, which are in engagement with the likewise bent portions 39 having twelve finger slides 27 a in the sub-frame 23 for actuating the game lever 34 in engagement. By moving three of these twelve finger slides 27b and the associated noses are moved. In this way, the corresponding flaps 18B, 18C are opened, while by setting the register a corresponding selection and thus a corresponding disorder can be set. The chords are thus formed within one octave (with corresponding chorus).

However, the voice sticks 16B and 16C each include 21 sounds, which are not all necessary for playing the chords and the second tones for the bass, respectively. Rather, all sounds, including those of the bass, can be played individually. For this purpose, the rocker 31 is brought into the solid shown in Fig. 1 position. The playing of single notes (baritone) via the play buttons 13 of the series III to VI. .

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In Fig. 5, those parts are shown / needed when playing single notes with the tapered sticks 16B and 16C. The individual game lever 34 of the rocker 31 are in this case directly to the ends of the button slide 29. For each button slide 29 of the upper frame 24 and thus to each play button 13 of the series III to VI includes a game lever 34 of the rocker 31 (however, the row VI only serves as a game aid and generates the same sounds as the game buttons 13 of the series III). By pressing a play button 13 of the series III,: ' to VI is thus directly on the associated game? lever 34 generates a single tone.

Although by pressing those buttons 13, which are also used for the chords; also the finger slide 27c of the upper frame 24 actuated / but this does not lead to tone generation, since the lugs 40 of the finger slide 27b in the sub-frame 23 due to the pivoted position of the rocker 31 does not abut the corresponding play levers 34 of the rocker 31 and can not operate, so that no simultaneous playing of chords can take place. When playing chords, however, the button slide 2 9 rows III to VI can operate due to the position of the rocker 31 no play lever 34; the rocker 31 is pivoted in this case according to the stroke of the game buttons 13 of these rows.

In Fig. 6, those parts are shown / when playing 'single tones of the standard bass with the; Voice pole 16A will be needed. The associated

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Play buttons 13 of the series III to VI in turn actuate a play lever 34 of the rocker 31, which is again in the position of Fig. 5. The associated twelve game lever 34 are each with a bent portion 45 of twelve slide valves 46 a into engagement, which are mounted longitudinally displaceably in the sub-frame 23. The gate valves 46a engage with their bent parts 45 on the back of the game lever 34, so that they are moved by pivoting the game lever 34 inwardly. As a result, the corresponding finger slide 27a for the desired bass tone is shifted over the associated shaft 25 / the corresponding flap 18A opens.

Although in this case the finger slide 27b are actuated by the shaft 25 for the Sekundreihen, but these are not with their lugs 40 on game levers 34 of the rocker 31 on / so that only single sound play can be done in this rocker position.

However, in order to obtain a continuous tone sequence, the four tones of the intermediate bass are inserted on the voice pole 16A, which are needed only for the single-tone performance. A tone range for the standard bass from E ₁ to DIS is the notes EF Pis and G. '- "' ^:: '' ^: '.' ... [.:; '['".:''..': ·. ' /. '.-' \ \ _ "' ". ".''.,^; \ ./ .. ·.'''

In Fig. 7, those parts are shown, which are needed when playing the Zwischenbasses. By * playing buttons 13 for the intermediate bass in the rows III

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· - 16 -

to VI, four play levers 34 of the rocker 31 (in the position of Fig. 5) are again actuated, which engage with four associated draw slips 46b as for the standard basses. Only these four pushers 46b engage with a cranked portion 39 directly to the corresponding Clavishebeln 1 9 for the vocal pot 16A and lead by its operation to tone production.

As is apparent from Fig. 1, are all the pushers 46 in the Posotion the rocker 31 as shown in FIGS. 3 and 4 not with the rocker 31 into engagement and can not actuate acting on the associated game lever 34 in this position.

It can be seen that the playing of the standard basses on the game buttons 13 of the rows I and II is otherwise independent of the position of the rocker 31. These can therefore be played at any time. The switching of the rocker 31 but allows you to switch from chord to single tone, with the latter also the single-tone standard bass is possible.

In Fig. 8 is shown an expedient embodiment of the hinge 38 in the form of a hinge joint. This consists of a plastic body having one or two insertion holes 50 for a simple or double-formed connecting rod 37 and an insertion 51 for the free end of a Clavlshebels 19. The attachment can be done via a press fit or by gluing. Between the

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Eihstecklöcher 50 and the insertion opening 51 having portions of the plastic body is a slot 52 which divides the plastic body into two by a narrow web 53 interconnected parts. The web 53 allows pivoting of one part relative to the other in the form of a joint, while the slot 52 ensures the necessary pivotability by its width.

The bassinet 15 preferably includes a generally U-shaped depression from which the flaps 18B and 18C are received with the associated ends of the Ciavishebel 19, so that the flaps 18A are arranged staggered to the flaps 18B and 18C. This makes it possible to mount both a bass cassotto 60 over the flaps 18a and a baritone cassotto 61 over the flaps 18B. At the same time then the bass Cassotto 60, the frame 23, 24 and the baritone Cassotto 61 carry the bearing bar 21 with the associated Clavishebeln 19. The baritone cassotto 61 can be fastened on the filling 15 adjacent to the flaps 18A. ^{'-': ·} '. . '. , / '.'"- y - ':;·'';;'_; ./

The frames 23, 24 can be assembled and disassembled together with the parts they receive as assemblies. Also, the rocker 31 can be removed after disengaging the joints 38 as a component or mounted in a corresponding manner. '. . "; - ^: ''. ·>.-;';';:.;..:;:;::','.::.';·' - "/ ^ v ',' .. / / '':." ^.. ·

The construction described avoids an acoustic constriction, the air holes 17 in the filling 15 can

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sufficiently large and the Cassottos 60, 61 together with a hood 58, which is located above the bass-sounding plates of the bass-Stimmstocks 16A, give up- and downstream rooms, which increase the sonority and responsiveness, especially of low tones. To avoid a kink of intonation from vocal to Stimmstock the hood 58 is to be adjusted accordingly, while the bass reeds in the bassoon: 16A in their distance from the bass fill 15 offset from each other can be arranged so that the voice plate for the lowest tone farthest from the Bass fill 15 is removed and the highest pitch reed plate of the reed 16A is located closest to the bass fill 15.

In addition, for better balance with the Diskantteil the bass enclosure 10 in its interior have a shutter 55 which is actuated from the outside to release or for closing openings.

The actuator for the rocker 31 is shown in Fig. 9. It comprises on the outside of the Baßge- housing 10, namely adjacent to the row VI of play buttons 13 a plurality of opposite the handle plate 14 displaceable / spaced along a straight line parallel to P.eihe '; VI arranged switching buttons 70 which are connected to each other via a longitudinally displaceable guided strip .71 on the inside of the handle plate 14. The strip 71 is provided at each end with a directed into the interior of the bass enclosure 10 pin 72 which is in engagement with one end of an arm of a bell crank 73.

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The toggle lever 73 is rotatable about a pin 74 arranged in the bass housing 10. The other arm of the toggle lever 73 is articulated to a lever 75, on the other hand rotatably connected to an actuating pin 76 of the rocker 31. The strip 71 is displaceable between two end positions, which are limited by corresponding stops, which are formed for example by elongated holes for guiding the switching buttons 70 in the handle plate 14. If the bar 71 is displaced in the direction of the arrow, the toggle levers 73 are pivoted via the pins 72, as a result of which the levers 75 are moved towards or away from the bar 71. As a result, the rocker 31 is pivoted about the pins 33 as a rotation axis, which are mounted in housing-fixed bearings 77, from one of the positions shown in Fig. 1 in the other. '· ;. '- - ^: ,. ""''":'''-.': \ ': ·::' ... ' , '. "'. · '.- / ^:

Claims (22)

23701 2 2 Claim for information 1 .' · Bass section for an accordion for playing bass, chords and single notes, with a bass case in which a bass filling is arranged, which carries a plurality of voice sticks and associated therewith air holes, which are closed by Clavishebel operable louvers, the Clavishebel for the bass via associated button slides are part of a bass movement, while the clavis levers for; Chords are movable on the associated button or finger slide, which are part of a piecework, with button slides are arranged with associated Ciavishebeln for louvers for the single-tone performance in the chord and a switching from chords to single-tone game is provided, characterized in that the switching means to a switching axis between a first and a second position switchable rocker (31) comprising a plurality of about a play axis (35) pivotable, the individual Ciavishebeln assigned and this operating game lever (34) carries, in which in the first position for the single-tone performance engage all the button slide (29) of the chord mechanism for operating all Clavishebel (19) directly, while in the second position for the Akkordspiöl finger slide (27), which are actuated via the button slide (29), directly on game levers (34) attack, the Ciavishebeln (19) assigned to the chord playing si nd. 237012 2 2. bass part according to item 1, characterized in that the rocker (31) consists of a frame (32), in which the play levers (34) are arranged parallel to each other about the play axis (35) pivotally. 3. bass part according to item 1 or 2, characterized in that the operation of the Clavishebel (19) for the Sekundreihen serving game lever (34) with the associated Ciavishebeln (19) each have a joint (38) are connected. -. .., - '. ''".' / · V. ·. - ". .: "'';; f,: '. ^; · /' · ' ,, ' ,. '- "': '- ,,'. 4. bass part according to item 3, characterized in that the joint (38) consists of a clavis lever (19) attached to the body, which consists of two part bodies, by a only a narrow movable web (53) leaving slot (52) are separated, wherein a partial body with the game lever (34) is connected. 5. bass part according to item 3 or 4, characterized in that the joint (38) is articulated in the indexing axis of the rocker (31) on the play lever (34). 6. bass part according to one of the points 3 to 5, characterized in that the joint (38) via a on the body of the joint (38) attached to the connecting rod (37) on the play lever (34) is articulated. 7. bass part according to one of the items 1 to 6, characterized in that the switching device manually 237012 2 operable / on the outside of the bass grip board (14) arranged Umschaltknöpfe (70) which via a displaceable strip (71) on the inside of the bass grip board (14) with each other and via a linkage (73, 75) connected to the rocker (31) are. 8. bass part according to item 7, characterized in that the linkage (73, 75) is a toggle linkage. 9. bass part according to one of the items 1 to 8, characterized in that by the button slide (29) for the bass operated finger slide (27 b) in the second position of the rocker (31) with the associated game levers (34) for playing polygonal basses in Engage. 10. bass part according to one of the items 1 to 9, characterized in that the finger slide (27 a) for the Clavishebel (19) of the bass via slide (46) are actuated, in the first position of the rocker (31) with associated play levers (34) are engaged. 11 .Baßteil according to one of the points 1 to TQ, - characterized /, characterized in that the required for the chord game finger slide (27b) which engage in the second position of the rocker (31) on the associated game levers (34), via finger slide ( 27c) operable in the chord mechanism while the finger levers (27d) abutting the play levers (34) are arranged in the bass mechanism. 2370 12 2 ..- 23 - 12. bass part according to one of the items 1 to 11, characterized in that for playing intermediate shots in the first position of the rocker (31) with associated play levers (34) engaging, directly on the associated Clavishebeln (.19) engaging pull slide (46b ) are provided. 13. bass part according to one of the items 1 to 12, characterized in that bass and chord work individually and independently of the rocker (31) are removable assemblies.,.; '; : '''." ^: -'. '. .-"' - ':';';".'.-.:.; .. '.''"/';. . ''. ''. <'''. · 14. bass part according to one of the items 1 to 14, characterized in that the bass filling (15) has a trough-shaped recess in which the louvers (18 B, 18 C) are recorded for the secondary rows, wherein the louvers (18 A) belonging to the basses in a staggered. Plane are arranged, wherein the Ciavishebel (19) are arranged stepped. 15. bass part according to one of the items 1 to 14, characterized in that a baritone cassotto (61) over the region of the louvers (18 B) is arranged. 16 bass part according to item 15, characterized in that the Ciavishebel (19) are mounted for the bass on the baritone cassotto (61). 17. bass part according to one of the items 1 to 16, characterized in that above the louvers (18 A) for the basses a bass Cassotto (60) is arranged. 237012 2 18. Bass section according to item 17, characterized in that the bass cassato (60) carries the bass movement and the chord work; '' - ''':''; ^: '. ':':'''' /. ''/[''''. /' [. ' 19. bass part according to one of the items 1 to 18, characterized in that the bass-sound post (16 A) carries a hood located above the Baßstimmplatten (58). 20. bass part according to one of the items 1 to 19, characterized in that the bass-reed plates in the bass-horn (16A) in their distance from the bass filling (15) to avoid an intonation kink to the subsequent post (16B) are offset from each other. 21. bass part according to one of the items 1 to 20, characterized in that the bass enclosure (10) includes an externally adjustable shutter (55) for releasing openings. , / \. ·.;.; '. , '. /. ^. , '': '. ; . ''. ' 22 bass part according to one of the items 11 to 21, characterized in that the finger slide (27c) engage in the chord behind the finger slide (27b) in the bass movement. iSeous drawing