EP2420998B1 - Playing analysis device for an instrument with keys - Google Patents

Description

The invention relates to a Spietanalysevorrichtung, in particular for a keyboard instrument or percussion instrument, with an input for input signals of a piece of music, a memory in which at least two temporally successive incoming input signals are stored, a clock computer, determined by the function of these at least two input signals, a first clock signal is. In addition, the invention relates to a method for analyzing a game on a keyboard instrument.

For musicians, especially for solo entertainers, aids to support in performing or performing a song are becoming increasingly important. There are already a variety of devices that have, for example, a Rhythmunterlegung or a kind of chord recognition and thus give the audience a more rhythmic, fuller and more intense sound of the recited song. A problem usually consists in the fact that the rhythm or clock recognition can not variably react to changes during the play.

Basically, it is known in electronic pianos or synthesizers to manually tap on a special input field a clock from which a clock signal can be derived. The disadvantage here is that during the game of the piece of music no adaptation to a changing rhythm can be done via this special input field.

From the US 5,256,832 Although a type of variable clock identifier (beat detector) is apparent, however, this clock recognition depends on the amplitude of an audio signal and is thus significantly influenced by the volume of the audio signal, which must be above a certain threshold to have an influence on the clock recognition. In addition, always a specific song (track) must be selected, which is used as a basis for the clock recognition.

In the German patent DE 101 01 473 B4 Although an automatic detection and adjustment of tempo and phase of pieces of music and an interactive music player based on it is shown, but also in this document Rhythm dependent on peaks in the frequency bands created by incoming audio signals.

From the JP 2008-233812 goes out a Tondetektiervorrichtung, which is mainly concerned with the adaptation of deviations in the singing of karaoke. In this generic foreign state of the art is thus not at all a game analysis of a keyboard instrument but rather a deviation detection when singing karaoke.

The object of the present invention is therefore to provide a comparison with the prior art improved game analysis device for a keyboard instrument. In particular, a variable clock recognition is to be created. This should be dependent on the concrete game of a musician on the keyboard instrument and can be influenced without having to operate separate input fields and without necessarily be dependent on the volume.

This is solved for a performance analysis device having the features of the preamble of claim 1 in that the input signals, which are preferably in the form of a digital control signal, represent a first press time and a second press time of keys of the percussion instrument or beat timings of drums of the percussion instrument the clock computer from the determined first clock signal generates a lying after the second beat or pressing time input signal time window and stores in memory, wherein the clock computer in the presence of an input signal, which represents a third beat or pressing time, this third beat or pressing time with compares the input signal time window and at a lying in the input signal time window third beat or pressing time an updated clock signal in response to the second and third beat or pressing time determined.

Thus, the clock identifier is no longer dependent on unreliable and widely varying amplitudes of an audio signal, but is directly affected by the keys pressed by the musician while playing the piece of music. Moreover, creating an input signal time window eliminates the need to specify the rhythm by means of cumbersome, inflexible "knocking fields" since the game analysis device itself always detects changes in the measure as soon as during playback of the determined input signal time window receives no input signal from a key of the keyboard instrument.

In general, although it is possible that the input signals in the form of any digital, analog or audio-based formats or control signals from key sensors of the keyboard instrument are supplied to the game analysis device, one possible embodiment is that these signals are in MIDI format. MIDI means Musical Instrumental Digital Interface and is a data transfer protocol for the purpose of transmitting musical control information between electronic instruments. These MIDI signals thus do not carry actual audio signals but rather control data that drive electronic sound generators. Since a MIDI signal (or any other digital control signal) always contains at least the information "key pressed" and "key no longer pressed", the press duration can be determined. As pressing time for this invention is always considered that time in which the input signal by pressing the associated button ("x pressed button") is generated.

To allow time allocation in the game analysis device, there is a clock associable with the MIDI format or digital control signal, which divides the time into logical, very short units and logically links each incoming key control signal to a particular time stores.

According to a preferred embodiment of the present invention, it may be provided that the input signal time window begins after a time period after the second press time, which is at least 80%, preferably at least 90%, particularly preferably at least 95% of the first clock signal. Thus, in the meantime, any keys on the keyboard instrument can be pressed and played without having an influence on the clock signal to be detected. Preferably, it can also be provided for this purpose that the time length of the input signal time window is at most 40%, preferably at most 20%, particularly preferably at most 10%, of the length of the determined clock signal. Thus, by this preferred embodiment of the game analysis device based on the first calculates a time window in which the next clock-influencing or clock-giving button signal is to be expected.

Particularly preferably, it can further be provided that the first clock signal corresponds to the time interval between the first press time and the second press time, and the updated clock signal to the time interval between the second press time and third press time or an average of the time interval between the first and second press time and the time interval between second and third pressing time corresponds. Thus, the updated clock signal may not necessarily always depend on the last two push times, but may represent an average of the last two (or even several previous) clock signals.

In order to achieve a musical improvement of the played piece of music from the variable clock recognition, it can be particularly preferably provided that input signals, which represent the pitch of keys of the keyboard instrument, can be forwarded to the memory and stored in the memory via the input, in dependence the stored Drückzeitpunkts of at least one key and the pitch of this at least one key from an audio calculator an output signal to an output of the game analysis device is forwarded. Thus, the last-pressed, operated in the input signal time window key is not only essential for the clock recognition, but also takes into account when creating a suitable output signal via the audio computer. This audio calculator, starting from the pitch of the last key (or even taking into account several previous keys) generate a corresponding to the piece of music output signal. This output signal is preferably forwarded to an audio output device (sound generator) separate from the game analysis device. Depending on the design and space requirement but can also have the game analysis device itself the sound generator.

In order to achieve an optimum output adapted to the piece of music, it can preferably be provided that the audio computer can feed this generated output signal to an audio output device as a function of the clock signal in a predefinable output time window.

It is particularly preferred that the output time window corresponds at most to the length of the clock signal and begins at the earliest with the press time of the second or third key. Thus, it is guaranteed that the output signal is output during the clock beginning with the last received clock signal. However, it should not be ruled out that the output signal can last longer than the calculated current clock.

In a simple but effective embodiment of the present invention, it can be provided that the output signal represents a repetition of the pitch of the second and third pressed button. Alone by this measure already a fuller sound effect can be achieved by the pure repetition of the previously pressed key at a time at which the player does not play or presses. Due to the additional dependency on the determined clock signal, this tone repetition can also be integrated into the rhythm pattern of the currently played piece of music by means of the output time window.

Alternatively, however, it can also be provided that the pitch of the at least one key can be compared to a scheme, preferably one of several stored schemes, by the audio computer, and a corresponding chord or fundamental tone value can be determined from the scheme as an output signal. Such schemes are set out in detail in the Austrian patent application with the application number A 1652/2009.

In order to keep the game analysis device always at the currently played state of the piece of music may preferably be provided that the game analysis device has a switchable on and off game mode, wherein the game operating mode in the memory, the push times always from the push time of the last time, penultimate and temporally pre-last key pressed can be overridden, wherein the updated clock signal and thus the output time window can be determined at least as a function of the last two keys pressed and is therefore variable in the game mode of operation. Of course, more than three input signals can also be stored in the memory of the game analysis device.

The variability of the length of the output time window depends directly on the currently determined clock signal. With a strong change of this clock signal from one clock to another, it could happen that the output signal no longer completely matches the changing clock, which is why it is preferably provided that only if the length of the clock mode variable in the clock mode is changed below 20%, preferably less than 10%, more preferably less than 5% with respect to the preceding clock signal, an output signal can be output to the output. This problem can also be solved with a narrow or short input signal time window in that an output time window is only generated if during the previous input signal time window a key was pressed and thus a new updated clock signal was output by this triggering time.

In order to achieve optimum adaptation of the performance analysis device for an accordion player, it may be preferred that the input signals represent the push timings and pitches of keys of at least two different key ranges, preferably a chord key range and a bass key range, by the heartbeat from time-spaced push-through times of keys the key areas, preferably taking into account stored clock pattern, the clock signal can be determined. These stored clock patterns may represent, for example, the basic alternating patterns when playing a waltz or a polka. In a waltz, a chord key is always followed by two chord keys, whereupon a bass key is pressed again. On the other hand, in the case of a polka, a bass key and a chord key are alternately pressed rhythmically. This can be an essential aid both for the clock recognition and for the chord recognition.

Preferably, it can also be provided for this purpose that the input signals also represent the pitch of treble key ranges of the keyboard instrument (accordion), these input signals being usable only for chord determination and that the audio calculator only uses the triggering times of keys of the chord and bass key range for the calculation of the clock signal. That is, for the chord recognition all key ranges are used, while for the clock recognition only the chord and bass key area is determining.

Protection is also desired for an arrangement having a performance analysis device according to any one of claims 1 to 11 and an audio output device to which the output signal is routable from the output of the game analysis device, the audio output device outputting a stored audio recording in response to the supplied output signal. These stored audio recordings can be mono- or multi-tone templates for a tone generator that outputs drum sounds, bass notes, chord tones, guitar sounds or the like. This respective output can be selected and set by the music player via a control panel on the game analysis device or on the audio output device.

Furthermore, protection is desired for a keyboard instrument, in particular accordion, with at least two key areas, each with a plurality of keys, wherein the keys lead signal lines for the transmission of signals, in particular digital control signals, to a key signal output, to which a game analysis device according to one of claims 1 to 11 is connected via its input for input signals. Such a keyboard instrument with a connected game analysis device according to the invention, in combination with an internal or external audio output device, can form an ideal basis for making music for solo entertainers or even for small bands.

The object of the present invention is achieved for a method for analyzing a game on a keyboard instrument by the steps according to claim 14. Two preferred further steps for such a method may provide that in addition the pitch of at least the last key is stored and that an output signal is then generated as a function of the pitch of at least this last key and in dependence on the determined clock signal by an audio computer. Particularly important and preferred may be provided that the output signal is output during an output time window which corresponds at the longest to the length of the clock signal and begins at the earliest with the pressing time of the second key.

Fig.1

schematisch ein Tasteninstrument mit daran angeordneter Splelanalysevorrichtung,

Fig.2

schematisch die Spielanalysevorrichtung mit Speicher, Taktrechner und Audiorechner,

Fig. 3

eine konstante Tastendrückabfolge mit konstanten Drückzeitpunkten,

Fig. 4

eine konstante Tastendrückabfolge mit zusätzlichen Drückzeitpunkten,

Fig. 5

eine Tastendrückabfolge mit unregelmäßigen Drückzeitpunkten und

Fig. 6

eine Tastendrückabfolge von zwei Tastenbereichen.

Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawings. Show:

Fig.1

schematically a keyboard instrument with Splelanalysevorrichtung arranged thereon,

Fig.2

schematically the game analysis device with memory, clock and audio calculator,

Fig. 3

a constant key press sequence with constant press times,

Fig. 4

a constant key press sequence with additional press times,

Fig. 5

a key press sequence with irregular press times and

Fig. 6

a key press sequence of two key areas.

Fig. 1 1 schematically shows a keyboard instrument 2 in the form of an accordion showing a treble key area D and a chord key area A and a bass key area B, all of which have a plurality of keys 4. Each key 4 has key sensors, whereby by pressing a key 4 corresponding digital control signals are sent from the individual sensors to the key signal output 11. This output (which may, for example, be in the form of a MIDI OUT terminal) is connected to an input 3 (for example, MIDI IN) of a game analysis device 1. This Spielanalysevomchtung 1 has a memory 6, a clock calculator 7 and an audio calculator 9, in whose dependency via the output 8 (MIDI OUT) an output signal L, for example as a MIDI signal, to an audio output device 10 (sound generator) can be output.

In Fig. 2 It can be seen that one of the key signal outputs 11 is preferably forwarded per key area A, B and D in each case a digital control signal (input signal S _th ) with information about the pressing time t and the pitch h to the input 3 of the game analysis device 1. In this game analysis apparatus 1, in a logical table of a memory 6, the printing timings t ₁ , t ₂ and t ₃ are stored by successively pressed keys 4 ', 4 "and 4"'. The respective pitches h ₁ , h ₂ and h ₃ are suitably stored for this purpose. This memory 6 is constantly updated while playing a piece of music.

Subsequently, the game analysis device 1 has a clock computer 7, which first calculates a clock signal b from the first press time t ₁ and the second press time t ₂ . Subsequently, the clock calculator 7 calculates from the second Pressing time t ₂ and dm third pressing time t ₃ an updated clock signal b _akl . This clock calculator 7 can additionally rely on a clock pattern M, which may correspond, for example, to a polka or a waltz, wherein a clock pattern M according to a polka is expected by the game analysis apparatus 1 to have a relatively uniform clocking sequence of alternating concatenation tasf area A and bass key area B. ,

Furthermore, the game analysis device 1 provides an audio computer 9 which, depending on the key signal b, either repeats the last-pressed key 4 in the chord key area A or in the bass key area B and forwards it as an output signal L to the output 8. However, a preferred embodiment of the audio computer 9 can provide that the audio computer 9 can fall back on at least one scheme F, based on which a chord or base tone value W can be determined as a function of the pitches h of the last-pressed keys 4 and as an output signal L as a MIDI signal. Signal on the output 8 of the game analysis device 1 to an audio output device 10 is forwarded.

Fig. 3 10 generally shows the sequence of press instants t ₁ to t ₄ , wherein the drawn line from left to right corresponds to the time profile on the basis of incoming input signals S (digital control signals) in the game analysis device 1. By way of example, assuming that the distance between press time t ₁ and t ₂ corresponds to one second, the key 4 represented by the press time t ₁ is pressed for one-eighth second. The first two pressing times t ₁ and t ₂ are written to a memory 6 of the game analysis device 1, from which immediately a subsequent to the pressing time t ₂ clock signal b is calculated. This clock signal b corresponds to the time interval between the pressing time t ₁ and t ₂ (= one second).

In response to this detected clock signal b, an input signal time window e is generated, which opens just before the end of the clock signal b (about one tenth of a second) and closes just after completion of the clock signal b. If a third key 4 '"is pressed in this input signal time window e, a new updated clock signal b _{akt is} determined from the distance between the third press time t ₃ and the second press time t ₂ and started immediately after or at the third press time t ₃ . Since with the third press time t ₃ whose Input signal S is received during the input signal time window e and is given a - depending on the size of the input signal time window e stable - clock signal b, an output time window a for the output of an output signal L to be generated can be specified. This output time window a should not be longer than the current clock signal b _akt and may be output depending on a detection pattern M. That is, in a polka or a waltz, this output time window a should open at half of the current clock signal b and may, for example, last as long as the input signal S of the key 4 "'of the last press time t ₃ be divided more or, for example, in a recognition pattern which describes a swing, moved backwards in time, whereby syncope-like intermediate tones are automatically generated by the game analysis device 1. Basically - as in Fig. 3 can be seen - with each new clock, a new input signal time window e is determined, in which case on the occurrence of a fourth press time t ₄ again an updated clock signal b _{akt is} generated and stored.

In Fig. 4 is shown how the problem is solved by the input signal time window θ, if between two actually clock-determining pressing times t ₃ and t ₆ more keys 4 are pressed at the pressing times t ₄ and t ₅ . Due to the fact that these pressing times t ₄ and t _{5 are} outside the input signal time window e, they are not used for the timing analysis, which is why the basic rhythm according to the Fig. 4 due to the received during the input signal time window e signal of the pressing time t ₆ remains substantially unchanged. Of course, it should not be ruled out that the updated clock signal b _akt following the pressing time t ₆ as a function of old preceding clock-determining pressing times t ₁ , t ₂ , t ₃ and t ₆ during a respective input signal time window e are taken into account. This can be done, for example, in the form of an average value. Although the pressing times t ₄ and t ₅ are not used for the clock recognition, they can very well influence or determine the output time window a or the output signal L of the audio computer 9 output during the output time window a.

In Fig. 5 FIG. 2 shows how the clock detection is continued if no input signal S in the form of an input signal S during a generated input signal time window θ Pressing time t arrives. If this is the case, as can be seen after the pressing time t ₃ , no updated clock signal b _{akt is} produced, but the next signal inputs in the form of the next two pressing times t ₄ and t _{5 are} waited, from which in turn a new first clock signal b results. From this, a new input signal time window e is then created, in which then the input signal of the push time t ₆ is actually received, from which an updated clock signal b _{akt is} calculated. From this Fig. 5 is particularly well seen that only bel presence of a relatively stable Tastendrück- or clock sequence, as it is given by the pressing times t ₄ , t ₅ and t ₅ , an output signal time window a is generated open.

In Fig. 6 a key press sequence is shown in which the key signals of two key areas (bass key area B and chord key area A) are taken into account for the clock recognition. In this example according to Fig. 6 In particular, there is a clock pattern M in the form of a polka, in which a key of the bass key area B and the chord key area A are alternately pressed (BABABA). Alternative embodiments are, for example, the sequences in a waltz (BAABAA) or, for example, pure bass key sequences (BBBB). From this Fig. 6 It can be seen that on the basis of the stored clock pattern M after each regular pressing time t ₁ , t ₃ , t ₅ and t _{7 of} a button in the bass area B an output time window a opens in which the pressed button of the bass button area B corresponding acoustic output is repeated. In contrast, of the depressed keys of the chord key area A according to the clock pattern M only after every second pressing time t ₂ and t ₆ an output time window a for the repetition of the chord signal is opened or generated The output time window a can of course be arbitrarily long, as long as the generated sound to each Clock of the piece of music fits.

A significant problem with the output of output signals L may be that at any given time, no output signal L is actually desired, but this would be generated due to the regular clocking sequence. To remedy this problem, it may be provided as a first solution that, while pressing a bass key and a chord key, as indicated by the pressing times t ₉ and t ₁₀ in FIG Fig. 6 is shown, no subsequent output time window a opens. In such a simultaneous pressing a button That is, the bass key and chord key are assumed to represent an end (or pause) of the current tune. Another possibility for preventing unwanted output signals L may be that the output screen window a only opens when certain keys of the treble key area D or the chord key area A are pressed between the last press time t and the actual output time window a. A further alternative solution may provide that output signals L are suppressed by pressing or leaving the foot pedal connected to the game analysis device 1.

In general, in the game analysis apparatus 1, the time signature (e.g., 4/4 time), tempo limit values, or limit values for the input signal time window e or output time window a can also be set in advance via an input field not shown in the drawings. In addition, pattern templates M for determining the sound of the output signals L can be selected via this input or control panel.

It is essential for the present invention that MIDI or audio data are generated as a function of a timing analysis of preferably two different key ranges A, B of an instrument Balgin. Subsequently, an evaluation can be made so that MIDI data is repeated or audio data is generated. These should then be spent whenever possible at a time when the player is not playing, thus ensuring a fuller and supportive sound. In this case, an additional chord recognition can form a musically valuable extension option of the underlying process.

• wie die letzte Taste 4 gedrückt wurde,
• wie es aus einem hinterlegten Muster M ausgelesen wurde,
• wie es in Abhängigkeit des derzeitigen Tempos b relativ zu diesem errechnet wurde oder
• bis die nächste taktbeeinflussende Eingabe erfotgt.

Basically, for the output time window a (tone length output), this output time window a lasts as long as

• how the last key 4 was pressed
• as it was read from a stored pattern M,
• as it was calculated relative to the current tempo b relative to this or
• until the next clock-influencing input is detected.

It should of course not be ruled out that for the Spielarialysevorrichtung 1 and a foot pedal, the Balglautstärke, the number of notes, the velocity and / or the chord type (major, minor) are used as influencing parameters for the output signal L.

It should also not be ruled out that the game analysis device 1 according to the invention is used for a percussion instrument, in which case the input signals - instead of keys 4 - come from different drums of the percussion and are taken off with corresponding sensors. Of course, the triggering times t are to be regarded as striking times. A game analysis device 1 according to the invention is therefore particularly suitable for electronic drums.

The present invention thus provides a connectable to the keyboard instrument 2 game analysis device 1 is shown, which allows in dependence of concrete input signals S _th of depressed keys 4 of the keyboard 2 a variable and constantly updating Takterkennung, Particularly preferred then - in any dependence on this clock detection - an output signal L can be generated, which generates a sound to the currently played piece of music in terms of timing and pitch in a sound generator 10 via a sound generator.

Claims (15)

1. A playing analysis device (1), in particular for a keyboard instrument (2), comprising

   - an input (3) for input signals (S) of a piece of music,

   - a memory (6) in which at least two input signals (S) input in time succession can be stored, and

   - a clock generator (7) by which a first clock signal (b) can be determined in dependence on said at least two input signals (S),

   characterised in that the input signals (S) represent a first pressing moment in time (t₁) and a second pressing moment in time (t₂), preferably of keys (4) of the keyboard instrument (2), wherein the clock generator (7) generates from the determined first clock signal (b) an input signal time window (e) which is after the second pressing moment in time (t₂) and stores it in the memory (6), wherein when there is an input signal (S) representing a third pressing moment in time (t₃) the clock generator (7) compares said third pressing moment in time (t₃) to the input signal time window (e) and in the case of a third pressing moment in time (t₃) which is in the input signal time window (e) determines an updated clock signal (b_akt) in dependence on the second and third pressing moments in time (t₂, t₃).
2. A playing analysis device according to claim 1 characterised in that the input signal time window (e) begins after a time interval after the second pressing moment in time (t₂) which is at least 80% and preferably at least 90% of the first clock signal (b).
3. A playing analysis device according to claim 1 or claim 2 characterised in that the time length of the input signal time window (e) is at most 40%, preferably at most 20%, of the length of the determined clock signal (b, b_akt).
4. A playing analysis device according to one of claims 1 to 3 characterised in that the first clock signal (b) corresponds to the time spacing between the first pressing moment in time (t₁) and the second pressing moment in time (t₂) and the updated clock signal (b_akt) corresponds to the time spacing between the second pressing moment in time (t₂) and the third pressing moment in time (t₃) or a mean value of the time spacing between the first and second pressing moments in time (t₁, t₂) and the time spacing between the second and third pressing moments in time (t₂, t₃).
5. A playing analysis device according to one of claims 1 to 4 characterised in that input signals (S) which represent the pitch (h₁, h₂, h₃) of keys (4', 4". 4"') of the keyboard instrument (2) can also be passed by way of the input (3) to the memory (6) and can be stored therein, wherein in dependence on the stored pressing moment in time (t₂, t₃) of at least one key (4", 4'") and the pitch (h₂, h₃) of said at least one key (4", 4"') an output signal (L) can be passed to an output (8) of the playing analysis device (1) by an audio computer (9).
6. A playing analysis device according to claim 5 characterised in that the output signal (L) can be generated by the audio computer (9), wherein said generated output signal (L) can be fed to an audio output device (10) by the audio computer (9) in dependence on the clock signal (b) in a predeterminable output time window (a).
7. A playing analysis device according to claim 6 characterised in that the output time window (a) corresponds at maximum to the length of the clock signal (b, b_akt) and begins at the earliest with the pressing moment in time (t₂, t₃) of the second or third key (4", 4"').
8. A playing analysis device according to one of claims 5 to 7 characterised in that

   - the output signal (L) represents a repetition of the pitch (h₂) of the second or third pressed key (4", 4"'), or

   - the pitch (h₂, h₃) of the at least one key (4", 4"') can be compared by the audio computer (9) to a scheme (F), preferably one of a plurality of stored schemes (F), and a corresponding chord or root value (W) can be determined as an output signal (L) from the scheme (F).
9. A playing analysis device according to one of claims 1 to 8 characterised in that the playing analysis device (1) has a playing operating mode which can be switched on and off, wherein in the playing operating mode the pressing moments in time (t₁, t₂, t₃) can always be overwritten in the memory (6) by the pressing moment in time of the pressed key (4', 4", 4"') which was last in time, penultimate in time and
   antepenultimate in time, wherein the updated clock signal (b_akt) and thus the output time window (a) can be determined at least in dependence on the two last pressed keys (4", 4"') and is thereby changeable in the playing operating mode.
10. A playing analysis device according to claim 9 characterised in that an output signal (L) can be output to the output (8) only upon a change in the length of the clock signal (b, b_akt) which is variable in the playing operating mode, that is below 20%, preferably below 10%, in relation to the preceding clock signal (b).
11. A playing analysis device according to one of claims 5 to 10 characterised in that the input signals (S) represent the pressing moments in time (t) and pitches (h) of keys (4) of at least two different key regions (A, B), preferably a chord key region (A) and a bass key region (B), whereby the clock signal (b, b_akt) can be determined by the clock generator (7) from time-spaced pressing moments in time (t₁, t₂) of keys (4', 4") of the key regions (A, B), preferably having regard to stored key patterns (M).
12. An arrangement comprising a playing analysis device (1) according to one of claims 1 to 11 and an audio output device (10) to which the output signal (L) can be passed by the output (8) of the playing analysis device (1), wherein the audio output device (10) outputs a stored audio recording in dependence on the supplied output signal (L).
13. A keyboard instrument, in particular an accordion, comprising at least two key regions (A, B) each having a respective multiplicity of keys (4), wherein signal lines for communicating signals, in particular digital control signals, lead from the keys (4) to a key signal output (11) to which a playing analysis device (1) according to one of claims 1 to 11 is connected by way of its input (3) for input signals (S).
14. A method of analysing playing on a keyboard instrument (2), in particular an accordion and in particular with a playing analysis device (1) according to one of claims 1 to 11, characterised by the steps:

    - storing the pressing moment in time (t₁) of a first key (4') of the keyboard instrument (2) in a memory (6),

    - storing the pressing moment in time (t₂) of a second key (4") of the keyboard instrument (2) in the memory (6),

    - determining a first clock signal (b) which corresponds to the time spacing between the pressing moment in time (t₁) of the first key (4') and the pressing moment in time (t₂) of the second key (4"),

    - generating an input signal time window (e) which begins after the second pressing moment in time (t₂) and storing said input signal time window (e) in the memory (6),

    - storing the pressing moment in time (t₃) of a third key (4"') of the keyboard instrument (2) in the memory (6),

    - comparing the pressing moment in time (t₃) of the third key (4"') to the input signal time window (e).

    - determining an updated clock signal (b_akt) in dependence on the pressing moments in time (t₂, t₃) of the second and third keys (4", 4"') when the pressing moment in time (t₃) of the third key (4"') is in the input signal time window (e).
15. A method according to claim 14 characterised by the further steps:

    - storing the pitch (h₂) at least of the second key (4") or the third key (4"') in the memory (6), and

    - determining an output signal (L) which is produced in dependence on the pitch (h₂, h₃) at least of the second key (4") or the third key (4"') and the determined clock signal (b, b_akt) by an audio computer (9), wherein the output signal (L) is output during an output time window (a) which at maximum corresponds to the length of the clock signal (b, b_akt) and which begins at the earliest with the pressing moment in time (t₂) of the second key (4").

Images