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8 条记录 (耗时 0.009 秒)

    Synthétiseur numérique polyphonique de signaux périodiques
    1.
    发明公开
    Synthétiseur numérique polyphonique de signaux périodiques 失效
    周期信号的和弦数字合成。

    公开(公告)号：EP0021964A1

    公开(公告)日：1981-01-07

    申请号：EP80400861.3

    申请日：1980-06-13

    申请人： Deforeit, Christian Jacques

    发明人： Deforeit, Christian Jacques

    IPC分类号： G10H7/00

    CPC分类号： G10H7/08 ,  G10H2210/205 ,  G10H2250/161

    摘要： L'invention a pour objet un synthétiseur polyphonique musical, entièrement numérique, dans lequel l'amplitude de chaque composante spectrale peut évoluer, en fonction du temps, selon une loi linéaire ou logarithmique.
    Des moyens de calcul d'amplitude produisent, à chaque période d'un signal d'horloge d'amplitude, une nouvelle valeur courante, selon une interpolation linéaire ou logarithmique entre l'amplitude courante initiale et une valeur d'amplitudefinale prédéterminée. La nouvelle valeur d'amplitude courante est mémorisée à la place de la valeur initiale. A l'égalité de l'amplitude courante et de l'amplitude finale, un signal est émis vers les moyens de commande du synthétiseur.
    L'invention permet d'obtenir des évolutions douces de l'amplitude et de réduire la complexité des moyens de commande de l'instrument.

    METHOD AND DEVICE FOR GENERATING TRIANGULAR WAVES
    2.
    发明公开
    METHOD AND DEVICE FOR GENERATING TRIANGULAR WAVES 审中-公开
    方法和器具，用于产生三角波

    公开(公告)号：EP2137721A1

    公开(公告)日：2009-12-30

    申请号：EP08714255.0

    申请日：2008-03-17

    申请人： QUALCOMM Incorporated

    发明人： MOLLOY, Stephen ,  DEVALAPALLI, Suresh ,  KAMATH, Nidish Ramachandra

    IPC分类号： G10H7/12

    CPC分类号： G10H7/12 ,  G10H2210/205 ,  G10H2210/211

    摘要： This disclosure describes techniques for generating a set of data points that form a triangular wave having a desired gain and a desired frequency. In one example, the method includes the step of (a) determining an increment value based on the desired frequency and the desired gain of the triangular wave. The method further includes the step of (b) adding the increment value to a current data point to generate a next data point, the current data point and the next data point forming a subset of the set of data points. The method further includes the step of iteratively performing (a) and (b) to generate the set of data points that form the triangular wave.

    Audio processing apparatus and method
    6.
    发明公开
    Audio processing apparatus and method 审中-公开
    Audiobearbeitungsvorrichtung und -verfahren

    公开(公告)号：EP2355092A1

    公开(公告)日：2011-08-10

    申请号：EP10193423.0

    申请日：2010-12-02

    申请人： YAMAHA CORPORATION

    发明人： Saino, Keijiro

    IPC分类号： G10H1/00 ,  G10H1/053 ,  G10H1/057 ,  G10H7/00

    CPC分类号： G10H1/053 ,  G10H1/0008 ,  G10H1/0091 ,  G10H1/0575 ,  G10H3/125 ,  G10H7/008 ,  G10H2210/066 ,  G10H2210/205 ,  G10H2210/211 ,  G10H2250/551 ,  G10H2250/621

    摘要： Phase setting section (34) sets virtual phases in a frequency series of an audio signal (XA). Unit wave extraction (36) section extracts, from the frequency series, a unit wave of one cyclic period defined by the set virtual phases, for each of a plurality of time points. First generation section (561) generates velocity information corresponding to a degree of compression/expansion, to a predetermined length, of the unit wave. Second generation section (562) generates shape information indicative of a shape of a frequency spectrum of the unit wave having been adjusted. Variation component impartment section (40) generates a variation component by use of the velocity information and shape information generated for the individual time points.

    摘要翻译： 相位设定部（34）设定音频信号（XA）的频率序列中的虚拟相位。 对于多个时间点中的每一个，单位波提取（36）部分从频率序列中提取由设定的虚拟相位定义的一个循环周期的单位波。 第一产生部分（561）产生与单位波的预定长度相对应的速度信息。 第二生成部（562）生成表示已经调整的单位波的频谱的形状的形状信息。 变化分量分配部分（40）通过使用针对各个时间点生成的速度信息和形状信息来生成变化分量。

    WAVETABLE SYNTHESIZER AND OPERATING METHOD USING A VARIABLE SAMPLING RATE APPROXIMATION
    7.
    发明公开
    WAVETABLE SYNTHESIZER AND OPERATING METHOD USING A VARIABLE SAMPLING RATE APPROXIMATION 失效
    波形合成和操作过程通过可变抽样时钟周期的APPROACH

    公开(公告)号：EP0925576A1

    公开(公告)日：1999-06-30

    申请号：EP97941039.0

    申请日：1997-09-10

    申请人： Cirrus Logic, Inc.

    发明人： JENKINS, Michael

    IPC分类号： G10H1 ,  G10H7

    CPC分类号： G10H1/125 ,  G10H7/02 ,  G10H2210/205 ,  G10H2210/281 ,  G10H2210/305 ,  G10H2240/056 ,  G10H2240/145 ,  G10H2250/061 ,  G10H2250/105 ,  G10H2250/121

    摘要： A variable sample rate approximation technique is used for coding and recreating musical signals in a wavetable synthesizer. Many sounds inherently include one large fast transfer of energy followed by vibrations that dampen over time so that the bandwidth requirement of a musical sound is reduced with passing time. Using the variable sample rate approximation technique, musical sounds are classified into two categories, sustaining sounds and percussive sounds. A sustaining instrument creates a noisy stimulus then sustains the sound created by the noisy stimulus. A percussive instrument is also a noisy source and generates a sound signal having high frequencies that decay rapidly while sustaining instruments sustain at all frequencies nearly equally. The sustaining and percussive instruments have substantially different waveform characteristics but present similar conditions with respect to memory reduction. Similarities between the acoustical characteristics of sustaining sounds and percussive sounds are exploited using a variable sampling rate technique to substantially reduce the memory budget of a wavetable synthesizer.

    Electronic musical instrument changing timbre by external designation of multiple choices
    8.
    发明公开
    Electronic musical instrument changing timbre by external designation of multiple choices 失效
    Elektronisches Musikinstrument mitKlangveränderungdurch Aussenbezeichnung von Mehrwahl

    公开(公告)号：EP0713206A1

    公开(公告)日：1996-05-22

    申请号：EP95117520.7

    申请日：1995-11-07

    申请人： YAMAHA CORPORATION

    发明人： Kondo, Masao, c/o Yamaha Corp.

    IPC分类号： G10H1/00

    CPC分类号： G10H1/0075 ,  G10H2210/205 ,  G10H2210/235 ,  G10H2210/251 ,  G10H2210/291

    摘要： An electronic musical instrument utilizes a tone generator installed with a plurality of timbres for generating a musical tone having a timbre selected from the installed timbres. A MIDI interface is provided for receiving timbre designation information which designates a primary choice and a secondary choice of desired timbres. A bank selector operates when the primary choice is present in the installed timbres for selecting the same so that the musical tone is generated in a desired timbre of the primary choice, and otherwise operates when the primary choice is absent in the installed timbres for selecting the secondary choice in place of the primary choice from the installed timbres so that the musical tone is generated in another desired timbre of the secondary choice.

    摘要翻译： 电子乐器利用安装有多个音色的乐音发生器，用于产生具有从已安装音色中选择的音色的乐音。 提供MIDI接口用于接收指定主要选择和所需音色的次要选择的音色指定信息。 当选择的主要选择存在于安装的音色中用于选择相同的音调以便以主要选择的期望音色产生乐音时，银行选择器操作，否则在安装的音色中缺少主要选择时进行选择 代替从安装的音色的主要选择的次要选择，使得在第二选择的另一所需音色中产生乐音。