CN103021391B - Automatic correction method for keyboard dynamics of electronic piano - Google Patents

Abstract

The invention provides an automatic correction method for keyboard dynamics of an electronic piano. The electronic piano is provided with a storage device and is corrected by the following steps of: 1. synchronously pressing down a fault key together with at least two adjacent keys at the same speed, transmitting a touch signal when each key is pressed down to a central processor, recording the press-down progress of each key, and calculating the press-down dynamics average (a) of each key; and 2. adding a dynamics adjustment coefficient to the fault key, wherein the dynamics adjustment coefficient f is equal to a/v, in the formula, the v is the press-down dynamics of the fault key, and storing the dynamics adjustment coefficient in the storage device. In the automatic correction method, the keyboard dynamics of the electronic piano is corrected by using software, these fault keys when in an actual use still hold the dynamics that is accordant with other normal keyboards, and thus the maintenance ratio of the fault keyboard can be reduced and the cost is saved.

Description

A kind of electronic piano keyboard dynamics automatic correcting method

Technical field

The present invention relates to musical instrument field, refer to a kind of electronic piano keyboard dynamics automatic correcting method especially.

Background technology

The button of electronic piano keyboard uses two conductive contacts, and when pianotron is pressed according to button, the mistiming of two contact successively conductings is foundation, judges that button presses the speed of speed, thus provides the dynamics value of pronunciation note.

But because plastic key distortion in actual use procedure, circuit board is subject to contamination by dust, and conductive carbon point is subject to the various factors such as contamination by dust, and when often occurring installing, each keystroke dynamics consistance of keyboard still can, but become for a long time in time, have keystroke dynamics to become situation that is large or that diminish.Running into this kind of situation generally can only maintenance process, and cost is very high.

Summary of the invention

The present invention proposes a kind of electronic piano keyboard dynamics automatic correcting method, solves the problem that in prior art, pianotron button maintenance cost is high.

Technical scheme of the present invention is achieved in that

A kind of electronic piano keyboard dynamics automatic correcting method, this electronic piano keyboard is provided with a memory storage, and revises as follows:

Step 1: pressed with identical speed with adjacent at least two buttons by fault button, and contact signal when being pressed by each button is sent to central processing unit, that records each button presses progress simultaneously, and the dynamics mean value a calculating that each button presses;

Step 2: according to described dynamics mean value, increases a dynamics regulation coefficient to described fault button, described dynamics regulation coefficient f=a/v, wherein said v be fault button press dynamics; And this dynamics regulation coefficient f is stored in described memory storage.

Preferably, the scope pressing dynamics v of fault button is: (1-0.2) * a≤v≤(1-0.1) * a, or (1+0.1) * a≤v≤(1+0.2) * a.

The present invention adopts the keyboard dynamics of software to pianotron to revise, these fault buttons are made still to keep the consistance of normal keystroke dynamics with other when reality uses, effectively can reduce the hardware maintenance rate of fault keyboard, all bring conveniently to client and producer, saved cost.

Embodiment

Be clearly and completely described the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Electronic piano keyboard dynamics automatic correcting method of the present invention, stores dynamics regulation coefficient by the memory storage be provided with in electronic piano keyboard, and revises as follows:

Step 1: pressed with identical speed with adjacent at least two buttons by fault button, and contact signal when being pressed by each button is sent to central processing unit, that records each button presses progress simultaneously, and the dynamics mean value a calculating that each button presses;

Step 2: according to described dynamics mean value, increases a dynamics regulation coefficient to described fault button, described dynamics regulation coefficient f=a/v, wherein said v be fault button press dynamics; And this dynamics regulation coefficient f is stored in described memory storage.

During practical application, after software startup keyboard dynamics zero offset capability, fault button is pressed with consistent speed together with adjacent key, by the device be connected with the contact signal of button, software can obtain the force value of each button, and can calculate the dynamics mean value a that each button presses.Comparatively large for keystroke dynamics and dynamics mean value a deviation, but can button within the scope of auto modification, increase a dynamics regulation coefficient f, the fault button making this deviation larger after the conversion of dynamics regulation coefficient close to dynamics mean value a.And other normal button, then the dynamics regulation coefficient given tacit consent to.

For can the keystroke dynamics scope of auto modification, can be different according to the actual parameter situation of pianotron and the quality requirements of pianotron, it is qualified that the present invention is set as that the deviation of keystroke dynamics is then judged as within 10% of dynamics mean value a, do not need to revise; Can extent of amendment if keystroke dynamics deviation is considered as within 20% of dynamics mean value a, method of the present invention can be adopted to revise; If keystroke dynamics deviation is outside 20%, is then judged to the heavy fault of hardware, does not reach correction object by method of the present invention.Namely the scope pressing dynamics v of recoverable fault button is (1-0.2) * a≤v≤(1-0.1) * a, or (1+0.1) * a≤v≤(1+0.2) * a.

Its adjustment process is calculated below with a specific embodiment:

If pianotron has 88 buttons, and the initial dynamics regulation coefficient of each button is f1=f2=f3=...=f87=f88=1.0, if button Key1, Key2, Key3, Key4, Key5 wherein is at the uniform velocity pressed together, the dynamics value detected is respectively v1, v2, v3, v4, v5, then dynamics mean value a=(v1+v2+v3+v4+v5)/5.

The dynamics deviation percent of described button Key1, Key2, Key3, Key4, Key5 be respectively (v1-a)/a ..., (v5-a)/a.

If the deviation of button Key3 is comparatively large, but still rational software can extent of amendment time, the dynamics regulation coefficient f3 of Key3 is revised as f3 '=f3*a/v3.

When then normally using, dynamics value when Key1, Key2, Key3, Key4, Key5 press is respectively v_1, v_2, v_3, v_4, v_5, revised v_1=1.0*v_1=v_1, revised v_2=1.0*v_2=v_2, revised v_3=t3 ' * v3=v_3*a/v3, revised v_4=1.0*v_4=v_4, revised v_5=1.0*v_5=v_5.Like this, keystroke dynamics button bigger than normal is after revising, and keystroke dynamics value is less than normal, and keystroke dynamics button keystroke dynamics value after revising less than normal is bigger than normal, to trend towards normal range.

After keyboard dynamics auto modification completes, namely exit the zero offset capability of keyboard dynamics, and the dynamics regulation coefficient of each button is recorded in pianotron.When pianotron normally uses, adopt the regulation coefficient table stored therein to revise the keystroke dynamics obtained during normal performance, obtain the dynamics value that tone period uses.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (2)

1. an electronic piano keyboard dynamics automatic correcting method, is characterized in that, this electronic piano keyboard is provided with a memory storage, and revises as follows:

Step 1: pressed with identical speed with adjacent at least two buttons by fault button, and contact signal when being pressed by each button is sent to central processing unit, that records each button presses progress simultaneously, and the dynamics mean value a calculating that each button presses;

Step 2: according to described dynamics mean value, increases a dynamics regulation coefficient to described fault button, described dynamics regulation coefficient f=a/v, wherein said v be fault button press dynamics; And this dynamics regulation coefficient f is stored in described memory storage.

2. electronic piano keyboard dynamics automatic correcting method as claimed in claim 1, it is characterized in that, the scope pressing dynamics v of fault button is (1-0.2) * a≤v≤(1-0.1) * a, or (1+0.1) * a≤v≤(1+0.2) * a.