The firstoert for 'The Memphis Tour' was spotted on the Oz Tketmaster site yesterday. Mah 1 at The Palais in Melbourne. Quote:The firstoert for 'The Memphis Tour' was spotted on the Oz Tketmaster site yesterday. Mah 1 at The Palais in Melbourne. Another Ardent field tr might be needed! Elizabeth Montgomery wrote:Quote:The firstoert for 'Th...
An electronic musical instrument comprising a host processor (10), process/engine interface (12) and sound engine (14) the latter utilizing partial control chip modules (32, 34) and a data path chip module (36) to effect multiple partial (Fourier) synthesis, in conjunction with a sound modelling technique, to generate up to 240 independent partials and impress time-varying amplitude envelopes on them and select and apply them to sound generation, each partial being controlled by selected parameters of frequency, amplitude, phase and attack/decay rate. A modulo-sumdither and oversampling approach to noise reduction is utilized in connection with the data path chip arrangement. Log sine addition is utilized to avoid multiplication apparatus ordinarily required to combine sine wave defining parameters.ClaimsWhat is claimed is:1. Electronic musical instrument comprising in combination:means defining a digitized waveform for utilization with multiple input parameter selections,means for making parameter selections via a user interface to generate digital inputs,means for generating logarithms of multiple parameters, adding the same and converting the sum to antilog equivalent and feeding back on itself to produce a sample sum and,means for applying the sample to output device and further comprising:means for modulating the sample sum by clipping the bit length of each digital word thereof by clip rounding off the most significant bits, from an original n bit length, and further reducing into p bit length usable as a data unit bytruncate-elimination of the most significant p bits of n.DescriptionBACKGROUND OF THE INVENTIONThe present invention relates to electronic means for music generation and more particularly has as its object the provision of such instrument with a sound engine comprising an architecture enabling the application of thousands of stored unitsof music digital data to rapid production of analog speaker-driving forms, utilizing practical solid state circuit means.The invention is described below with reference to electronic piano usage, but is also usable in a number of other electronic musical instrument roles to provide, singly or combined, the sounds of a variety of instrument, elements of human voiceand other sound sources and in analogous instrument contexts not involving music or voice, but involving comparably varying waveform data.Multiple Partial (Fourier) Synthesis is a technique well known in engineering practice. Any arbitrary periodic waveform (e.g., musical instruments' sound) may be reproduced by summing up a series of sine waves of appropriately determinedfrequencies, amplitudes, and relative phases. This technique allows great flexibility, much more so than subtractive synthesis (which starts out with a complex waveform and filters out unwanted spectral content) or wave-table synthesis (which can onlyreproduce whatever is in the table).
It is the object of the present invention to establish effective instrumentation using Fourier synthesis.SUMMARY OF THE INVENTIONThe musical apparatus of the invention inputs a stream of digital signals which represent a sequence of audio notes to be ultimately produced. The apparatus creates a sequential list of partials and impresses time-varying amplitude envelopes onthem, such that the sequential list completely characterizes the desired audio signal. A multiple partial synthesis, sometimes referred to as a Fourier Synthesis, is formed.Each partial from the sequential list is digitally generated by stepping through a ROM containing a single cycle forming the frequency of that partial and combining it with the amplitude envelope for that partial resulting in a signal with thedesired frequency, amplitude, duration and attack and decay rates. All the partials are summed into a digital data stream which is converted to an analog form, filtered and made available for use, for example by an audio amplifier and speakers producingsound.With reference to the preferred embodiment a sine wave is digitally stored and sensed at an appropriate rate of change of phase angle per sample frequency of a given partial. The phase angle determines the next value selected from the storedsine wave so that changing the rate of change of the phase angle changes the resulting frequency. The stored amplitude is scanned synchronously with the sine wave scanning in a pipe line design ensuring the proper time relationship between the two. Since a partial is a waveform multiplied by an amplitude, both are stored in log form, then added and the anti-log generated forming the resultant partial as a digital stream of signals.The technique has many useful properties. One is that the quality of a given sound increases as more partials are used to represent it. Another is that partials are controlled independently of one another. This feature allows less importantpartials to be "stolen" from notes already sounding, and used to form new notes. Taken together, these two properties allow both the ability to play many complex timbres simultaneously, as well as allowing enhanced quality for notes played singly or insome instances against a demanding background of silence. This is in contrast to many commercially available synthesizers, which allow only a limited number of voices. The latter force entire previously played notes to be silenced as more notes areplayed (e.g., a 10-note chord played on an 8-voice synthesizer).Additionally, multiple partial synthesis can be used with sound modelling data stored in one or more read only memories to lower the cost of extra installed voices, because of the greatly reduced storage requirements that go withpartials-synthesis. One second of waveform table as in conventional wave table storage may be tens of Kilobytes, whereas the information that describes a sound and the 10 to 50 partials needed to synthesize the same sound with the present inventionwould be smaller by a factor of up to 20. Similarly, having several voices available at once for a keyboard split or orchestral effect is much less expensive.The sound model data comprises, in accordance with the invention, the amplitude envelope for each partial as a series of exponential "segments" stored in ROM. Segments have the properties of duration (time) and rate/direction of change(attack/decay). During each segment, the amplitude of a given partial increases or decreases exponentially at a fixed rate maintained by the hardware of what is described herein as a sound engine. Thus, all the processor of such engine has to do isupdate the rate of change of amplitude for each partial after the apropriate duration, starting the next segment.The invention allows maintenance of a far greater number of accurate models for sounds available at all times compared to prior art capability. A digital model of the sound generation process is calculated in real time, as opposed to playing outa sample table. Each note on each pitch of each voice can be modeled separately, to any required accuracy, if so desired.The "engine" compris...
h4>AbstractIn an electronic musical instrument, playing data are produced by depressing a key in a keyboard, and divided into plural groups. At least one of the semi-automatic playing channels processes sound data of a musical piece read out of a memory to generate musical tones in synchronism with the playing data of at least one group. The sound data may be corrected according to sound correcting data before being used to generate musical tones.ClaimsWhat is claimed is:1. An electronic musical instrument comprising:playing data generating means for production of playing data in response to an action on a playing controller;musical piece data memory means for storing musical piece data comprising a series of musical sound data units;separating means for...
The CDs out there have a pristine sound, but records provide a better sound. Younger kids like the cover art on the records as well, according to James Patterson, age 17, who doesn't even remember when they LPs were popular in the past. He found some old LPs up in the attic at his grandparents home by the Beatles and the Rolling Stones, then his uncle grabbed him a player on eBay and he know displays it in his room.Replica turntable systems are available from various manufacturers. They look like the past machines but have today's technology used in them. A few top manufacturers include Memorex, jWin, Teac, and Crosley. Various functions are included, which includes USB connections, stacking up multiple LPs, and even recording from the LPs to CD as well.Raman of Classic Buys says th...
its very ne, but I want to get some new sounds. All I was wondering is if its possible to get new sounds on it if I got midi-> and bk. If someone know how to get new sounds and sh, or if you just know a few things about the korg, please add me on msn: Kelvinsollihogda@hotmailom, or just Hard at work in the Peruvian Ama...
Ionfessed a long time ago eltro-musomartle.php?t=225I guess in the pture there is a zoom H2 and beyer-dynam headphoneshomepage - - myspe - virb - berkleemusQuote:Stolen? What more?? has the pre of heroin gone up in Norway rently?! --------------------------------------------------...
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Looking at theiuits I was kind of intuiting the same thing. But I know that in eltrons intuition is no better than lk. At least when one is as mh of a noob as I am. MarkI'llhk theurrent requirements for the Appendage this weekend.My Site700)this.width = (700) " olk= "javart:window.open('upload.wikimedia.orgwikediacommons441NSRWDirtonntedDynamoandEngine.png','','rollbars=1,toolbar=yes,resizable=1,menubar=yes,dirtories=yes,status=yes') " alt= "ed Image, might have been reded in size.lk Image to view fullreen. " title= "ed Imag...
about 9 MB, sorry for using rapidshare if its iovenient. I let the atthment thing load for like 15 minutes and dided it was being stubborn. Is there any better way to do this?Edit: It is now atthed! Robot Love, expressed in AII art. ,,-,-.,-. ,-. ,,-. ,-,-. ,-.-. ,-.. ,-. ,-.,-.-..(( ( ( ( '( ' ( ' ) ' )' ...
