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公开(公告)号：US10810992B2
公开(公告)日：2020-10-20
申请号：US16442359
申请日：2019-06-14
申请人： Magic Leap, Inc.
摘要： Systems and methods for providing accurate and independent control of reverberation properties are disclosed. In some embodiments, a system may include a reverberation processing system, a direct processing system, and a combiner. The reverberation processing system can include a reverb initial power (RIP) control system and a reverberator. The RIP control system can include a reverb initial gain (RIG) and a RIP corrector. The RIG can be configured to apply a RIG value to the input signal, and the RIP corrector can be configured to apply a RIP correction factor to the signal from the RIG. The reverberator can be configured to apply reverberation effects to the signal from the RIP control system. In some embodiments, one or more values and/or correction factors can be calculated and applied such that the signal output from a component in the reverberation processing system is normalized to a predetermined value (e.g., unity (1.0)).
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公开(公告)号：US10405094B2
公开(公告)日：2019-09-03
申请号：US15702821
申请日：2017-09-13
发明人： Yuli You
IPC分类号： H03G5/00 , H04R3/04 , H04N21/233 , H04R1/22 , H03G5/16 , G10H1/16 , G10H3/12 , H04R3/00 , H03G3/00
摘要： Provided are, among other things, systems, methods and techniques for processing an audio signal to add virtual bass. In one representative embodiment, an apparatus includes: (a) an input line that inputs an original audio signal; (b) a bass extraction filter that extracts a bass portion of such original audio signal; (c) an estimator that estimates a fundamental frequency of a bass sound within such bass portion; (d) a frequency translator that shifts the bass portion by a positive frequency increment that is an integer multiple of the fundamental frequency estimated by the estimator, thereby providing a virtual bass signal; (f) an adder having (i) inputs coupled to the original audio signal and to the virtual bass signal and (ii) an output; and (g) an audio output device coupled to the output of the adder.
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公开(公告)号：US09818271B2
公开(公告)日：2017-11-14
申请号：US15152699
申请日：2016-05-12
摘要： A system generates a haptic signal. The system receives an audio signal, pre-processes the audio signal by modifying the audio signal to create a modified audio signal, and maps the modified audio signal to a haptic signal. The system then sends the haptic signal to an actuator to generate one or more haptic effects.
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4.发明授权Method and electronic device used to synthesise the sound of church organ flue pipes by taking advantage of the physical modeling technique of acoustic instruments 有权用于通过利用声学仪器的物理建模技术来合成教堂器官烟道的声音的方法和电子装置公开(公告)号：US07442869B2
公开(公告)日：2008-10-28
申请号：US10549388
申请日：2004-03-25
申请人： Carlo Zinato
发明人： Carlo Zinato
CPC分类号： G10H5/10 , G10H1/043 , G10H1/125 , G10H1/16 , G10H5/007 , G10H5/06 , G10H2250/041 , G10H2250/105 , G10H2250/111 , G10H2250/461 , G10H2250/515
摘要： The present invention consists in a method and electronic device used to reproduce the sound of church organ flue pipes, by taking advantage of the physical modeling technique of acoustic instruments; it being an audio-digital synthesis system based on digital signal processors, which contains a program of physical simulation of the generation of the sound of organ flue pipes.
摘要翻译： 本发明是通过利用声学仪器的物理建模技术，用于再现教会器官烟道管的声音的方法和电子设备; 它是一种基于数字信号处理器的音频数字综合系统，其中包含了器官烟道管声音的物理模拟程序。
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公开(公告)号：US06845165B1
公开(公告)日：2005-01-18
申请号：US09601515
申请日：1999-12-21
摘要： A high pass filter 32 having a cut-off frequency of 200 Hz and a cut-off response of +12 dB/OCT and a low pass filter 33 having a cut-off frequency of 400 Hz and a cut-off response steeper than −24 dB/OCT are used to pick out components in a double overtone region of 200˜400 Hz of a bass musical instrument such as a base or a bass drum from an input audio signal. The component which is picked out is input to distortion applying means 34 having an input-output response which is a non-linear response having no point symmetry with respect to 0 point, thus applying a distortion to cause even-numbered overtone components to be produced. An output from the distortion applying means 34 and the input audio signal are summed in a summer 18 to be delivered. Natural tones which have boosted bass tones and which are free from impurity are obtained.
摘要翻译： 具有200Hz的截止频率和+12dB / OCT的截止响应的高通滤波器32和截止频率为400Hz的截止频率比截止频率更高的低通滤波器33， 24 dB / OCT用于从输入音频信号中挑选低音乐器（例如底座或低音鼓）的200〜400 Hz双重泛音区域中的组件。 选择的分量被输入到具有输入 - 输出响应的失真施加装置34，该输入 - 输出响应是相对于0点没有点对称性的非线性响应，因此施加失真以产生偶数泛音分量 。 来自失真施加装置34的输出和输入音频信号在加法器18中相加以被递送。 获得了提高低音，无杂质的自然色调。
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公开(公告)号：US5834672A
公开(公告)日：1998-11-10
申请号：US555536
申请日：1995-11-09
申请人： Avery L. Wang
发明人： Avery L. Wang
CPC分类号： G10H7/02 , G10H1/16 , G10H7/12 , G10H2250/205 , G10H2250/561 , Y10S84/10
摘要： A method and apparatus for producing a tone (e.g. for music) without use of a waveform memory and using a feedback loop. The feedback loop includes a waveform generator which calculates, in real time, a parabolic approximation to a sine wave. The feedback loop includes a delay phase differencer to eliminate hunting. The output waveform from the feedback loop is provided to a sine function generator which approximates a sine value using a third order polynomial, to provide the output tone.
摘要翻译： 一种用于在不使用波形存储器并使用反馈回路的情况下产生音调（例如用于音乐）的方法和装置。 反馈回路包括一个波形发生器，它实时地计算出正弦波的抛物线近似。 反馈回路包括一个延迟相位差分器，用于消除狩猎。 来自反馈回路的输出波形被提供给正弦函数发生器，其使用三阶多项式近似正弦值，以提供输出音调。
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7.发明授权
公开(公告)号：US5583308A
公开(公告)日：1996-12-10
申请号：US200006
申请日：1994-02-22
申请人： Randall L. Owen
发明人： Randall L. Owen
CPC分类号： G09B15/00 , G09B15/023 , G10H1/12 , G10H1/16 , G10H2210/251 , G10H2210/295 , G10H2210/311 , G10H2220/036 , G10H2220/041
摘要： In an automated system for learning to play a musical instrument, music data and tone control data for a musical composition of an exemplary musical instrument is stored in machine readable form. An audio signal generated by a musical instrument being played, corresponding to the exemplary musical instrument, is inputted through a musical effects apparatus wherein the musical tone of the musical instrument being played is mixed with the stored music data. The musical effects apparatus is utilized, under digital control, to match the musical tone of the musical instrument being played with that of the exemplary musical instrument. More particularly, the music data and tone control data of the musical composition are stored on a conventional CD-ROM. The tone control data is utilized to create control parameters which can be used to control one or more electronic effects devices in an automated fashion. The stored parameters include control data utilized to set the values of one or more digitally-controlled programmable resistor networks capable of conditioning the input audio signal under digital control, without first converting the conditioned audio signal to a digital signal.
摘要翻译： 在用于学习演奏乐器的自动化系统中，以机器可读形式存储用于乐器的音乐作品的音乐数据和音调控制数据。 通过乐器效果装置输入与正在播放的乐器相对应的乐器产生的音频信号，其中正在播放的乐器的乐音与所存储的音乐数据混合。 音乐效果装置在数字控制下被使用，以与正在播放的乐器的音调与示例性乐器的乐曲相匹配。 更具体地，音乐作品的音乐数据和音调控制数据被存储在传统的CD-ROM上。 音调控制数据用于创建可以用于以自动方式控制一个或多个电子效果装置的控制参数。 存储的参数包括用于设置能够在数字控制下调节输入音频信号的一个或多个数字控制的可编程电阻器网络的值的控制数据，而无需首先将经调节的音频信号转换为数字信号。
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8.发明授权Harmonic tone generator for low level input audio signals and small amplitude input audio signals 失效用于低电平输入音频信号和小幅度输入音频信号的谐波音产生器
公开(公告)号：US5578948A
公开(公告)日：1996-11-26
申请号：US819987
申请日：1992-01-13
申请人： Soichi Toyama
发明人： Soichi Toyama
CPC分类号： H03B19/00 , G10H1/125 , G10H1/16 , G10H2250/545 , H03B28/00
摘要： A harmonic tone generator produces a harmonics signal even for input audio signals of a small amplitude. Conversion of a digitized audio signal in accordance with a predetermined non-linear function is performed also for an audio signal of a small amplitude. According to the second aspect of the invention, a level difference between the digital audio signal level in the present sampling time and the audio signal level in the preceding sampling time is detected and the detected level difference is converted to an output value in accordance with a predetermined non-linear function by a non-linear converting circuit. The converted output value is accumulated. According to the third aspect of the invention, the detected level difference is converted to a function conversion output in accordance with a predetermined function by a non-linear converting circuit. A gain of an amplifier to amplify the audio signal in the present sampling time is changed in accordance with the function conversion output.
摘要翻译： 即使对于小幅度的输入音频信号，谐波发生器也产生谐波信号。 对于小幅度的音频信号也执行根据预定非线性函数的数字化音频信号的转换。 根据本发明的第二方面，检测当前采样时间的数字音频信号电平与先前采样时间中的音频信号电平之间的电平差，并将检测到的电平差转换为根据 通过非线性转换电路预定的非线性函数。 转换的输出值被累加。 根据本发明的第三方面，通过非线性转换电路根据预定的功能将检测到的电平差转换为功能转换输出。 根据功能转换输出，改变放大器在当前采样时间放大音频信号的增益。
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9.发明授权Sound effector capable of imparting plural sound effects like distortion and other effects 失效能够赋予诸如失真和其他效果的多重声音效果的声音效果器
公开(公告)号：US5570424A
公开(公告)日：1996-10-29
申请号：US157625
申请日：1993-11-24
申请人： Toshinori Araya , Akio Suyama
发明人： Toshinori Araya , Akio Suyama
CPC分类号： H03F1/327 , G10H1/0091 , G10H1/16 , H03G5/10 , G10H2210/311 , G10H2250/205
摘要： A distortion effector includes a calculation section for performing a predetermined higher-degree expression calculation on an input digital sound signal, and a multiplication section that is provided in series with the calculation section for multiplying the digital sound signal by a coefficient that is adjusted so as to utilize a specific portion of the higher-degree expression which exhibits a smooth distortion characteristic. The digital sound signal is distorted in accordance with a smooth non-linear curve based on the higher-degree expression calculation, to thereby achieve a mild distortion effect. In a multi-effector capable of imparting three or more predetermined effects in such a manner that the effects can be selected to be imparted independently of each other, a registration device is provided for registering, for each of the effects, whether the effect should be made switchable or not. When a collective-switching switch is operated, control is performed such that the effect-on or effect-off state is inversively switched for any effect registered as switchable. For any effect registered as non-switchable by the registration device, the effect-on or effect-off state is not switched even when the collective-switching switch is operated.
摘要翻译： 失真执行器包括用于对输入数字声音信号执行预定的较高程度表达式计算的计算部分和与计算部分串联设置的乘法部分，用于将数字声音信号乘以被调整为如下的系数： 以利用具有平滑失真特性的较高程度表达式的特定部分。 基于较高程度的表达式计算，数字声音信号根据平滑的非线性曲线失真，从而实现轻微的失真效应。 在能够赋予彼此独立的效果的赋予三种以上的预定效果的多效应器中，提供了一种登记装置，用于对于每种效果来记录效果是否应当 是否可切换。 当集体切换开关被操作时，执行控制，使得效果或效果关闭状态被反转地切换以注册为可切换的任何效果。 对于由注册装置注册为不可切换的任何效果，即使在集体切换开关被操作时，效果关闭或关闭状态也不会切换。
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公开(公告)号：US5521329A
公开(公告)日：1996-05-28
申请号：US184699
申请日：1994-01-21
申请人： Akira Yamauchi , Masashi Hirano
发明人： Akira Yamauchi , Masashi Hirano
CPC分类号： G10H1/125 , G10H5/007 , G10H2250/451 , G10H2250/521 , Y10S84/09 , Y10S84/10
摘要： A musical tone synthesizing apparatus provides a closed loop containing an adder, a delay circuit, a filter and a gain control portion. The delay circuit has a delay time which is set responsive to a tone pitch of a musical tone to be produced. An excitation signal is produced in response to the musical tone to be produced and is introduced into the closed loop through the adder, so that the excitation signal circulates through the closed loop. The gain control portion is provided to control a loop gain of the closed loop on the basis of a preset parameter and another parameter which is controlled responsive to a tone color of the musical tone to be produced. The signal circulating through the closed loop is picked up as a musical tone signal representing the musical tone to be produced. By controlling the loop gain of the closed loop, an attenuation characteristic of the musical tone signal is controlled. Hence, it is possible to freely control a sounding time of a decay sound such as a guitar sound.
摘要翻译： 音乐合成装置提供包含加法器，延迟电路，滤波器和增益控制部分的闭环。 延迟电路具有响应于要产生的乐音的音调而设置的延迟时间。 响应于要产生的乐音产生激励信号，并通过加法器将其引入闭环，使得激励信号通过闭环循环。 提供增益控制部分，用于根据预设参数和响应于要产生的乐音的色调来控制的另一参数来控制闭环的环路增益。 通过闭环循环的信号被拾取为表示要产生的乐音的乐音信号。 通过控制闭环的环路增益，控制乐音信号的衰减特性。 因此，可以自由地控制诸如吉他音的衰减声音的发声时间。
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