An Algorithm to Extract Expressive Timing and Dynamics from Piano Recordings

2007 ◽  
Vol 11 (2) ◽  
pp. 155-182
Author(s):  
Andrew Earis

Measurable features of expressive piano performance include timing, dynamics, articulation and pedalling. This paper concerns the measurement of expressive timing and dynamics in audio recordings of piano music using a multi-stage semi-automated expression extraction process. A digitised version of the musical score is synchronised with the audio recording using a simple manual beat tapping system. The continuous wavelet transform (CWT) is then employed, with a Morlet wavelet, to correct the beat tapped times, and any further errors are then corrected manually. Precise note and chord onset times and dynamics of the recorded performance can then be calculated using the CWT. Sample results of the measurement of expression in keyboard music by Bach are given and the application of the algorithms to end users discussed.

Author(s):  
Wei Li ◽  
Cheng Zheng ◽  
Jian Zhao ◽  
Zhengxiang Ning

A novel microwave assisted multi-stage countercurrent extraction (MAMCE) technique was developed for the extraction of dihydromyricetin from Chinese rattan tea, Ampelopsis grossedentata. The technique combined the advantages of microwave heating and dynamic multi-stage countercurrent extraction and achieved marked improvement in extraction efficiency over microwave assisted batch extraction. Analysis of dihydromyricetin concentrations in the solvent and matrix throughout the extraction process showed that by dividing the extraction into multiple stages and exchanging of solvents between stages, steady and substantial concentration gradients were established between the matrix and solvent, thus enabling the achievement of high extraction efficiency. The yield of dihydromyricetin was significantly affected by temperature, pH, solvent/material ratio and extraction time, and optimal extraction conditions were found to be 80-100°C, at acidic pH with a solvent/material ratio of 25-30 to 1 and extraction time of 5-10 min. With the high extraction efficiency and low usage of extraction solvent, MAMCE could prove to be a promising extraction technique which can be applied to the extraction of dihydromyricentin and other bioactive substances from natural materials.


ICONI ◽  
2019 ◽  
pp. 73-82
Author(s):  
Ninel F. Garipova ◽  

The geographic position of Ufa, which in the early 19th century was a deep province, was not conducive to the development of musical culture. However, we must consider as an important element in its formation the active spread of household music-making and the wish of amateurs to participate in the city’s concert life. The “Society for Singing, Music and the Art of Drama” was founded in 1885 in Ufa following the wishes of the city residents. The twenty-year-long existence of the Society has left a considerable trace in the development of musical education and the exposure of the public to the academic genres of the art of piano performance; it played a signifi cant role in the development of musical literacy and the musical hearing of the residents of Ufa. In virtue of a number of existing social reasons the Society was closed down, but following the request of the most educated part of the local nobility and intelligentsia the Ufa Section of the Imperial Russian Musical Society (IRMS). Having existed for only a few years, until the revolution of 1917, it was able to lead the art of music to a new, higher level. Professionals with a higher musical education were conducive to the further expansion of promotion of music with their concert performances and teaching lessons in the musical classes and enhanced the development of the art of professional music in Bashkiria.


2015 ◽  
Vol 23 (11) ◽  
pp. 1774-1781
Author(s):  
Ping Wen ◽  
Kewen Tang ◽  
Jicheng Zhou ◽  
Panliang Zhang

2018 ◽  
Vol 121 ◽  
pp. 171-179
Author(s):  
Łukasz Konieczny ◽  
Rafał Burdzik

Diagnosing the technical condition of shock absorbers installed in automotive suspensions is a difficult issue due to the fact that these are elements of a complex mechanical system containing elastic and damping elements with nonlinear characteristics that degrade during operation. The paper presents the result of testing car with shock absorbers with programmed faults on the harmonic stand. The test object was a Fiat Seicento passenger car. The research experiment consisted in stimulating the vehicle to vibrations of forced masses, unsprung and sprung, and registration of vibration accelerations of these masses. The tests were subjected to shock absorbers with programmed faults in the form of loss of shock absorber fluid from 100% to 35% for rear shock absorbers. The acceleration of plates, swingarm (unsprung masses) and bodywork (sprung masses) were recorded by acceleration sensors. The results obtained in this way were subjected to wavelet analysis using the Morlet wavelet in the MatLab environment and based on these transformations the maximum of vibration amplitudes were determined depending on the degree of loss of the shock absorber fluid.


2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Ying Zhu

Piano performance is an art with rich artistic elements and unpredictable performance skills. It is an important carrier for playing beautiful piano sounds. The generation of musical tension and expression of piano performance is a vivid display of piano performance skills. In piano performance, we should pay attention to the cultivation and flexible application of performance skills. In order to ensure the richness and artistry of piano performance, it is fully based on the artistic characteristics of piano performance. Through in-depth analysis of the principle of the hidden Markov model, it is applied to the multimedia recognition process of piano playing music. In the process of obtaining the template, the fundamental frequency of the piano playing music differs greatly, and the piano playing music appears during the performance process. For the problem of low recognition rate, this paper proposes a multimedia recognition method for piano music. Finally, the analysis of experimental results shows that the method proposed in this paper has a 16% higher recognition rate than the traditional method, and it has a certain value in the multimedia recognition of piano music.


2018 ◽  
Vol 36 (3) ◽  
pp. 27-39
Author(s):  
Ashish Pathak ◽  
Prabhat Yadav ◽  
M. M. Dixit

In this paper , we derive asymptotic expansion of the wavelet transform for large values of the dilation parameter a by using Lopez and Pagola technique. Asymptotic expansion of Mexican Hat wavelet and Morlet wavelet transform are obtained as a special cases.


2010 ◽  
Vol 27 (2) ◽  
pp. 135-180 ◽  
Author(s):  
Blake Howe

Paul Wittgenstein's one-handedness has typically been framed as a physical limitation at odds with an able-bodied ideology driving musical performance. Contemporary reviews, for instance, frame the pianist's disability as a tragedy heroically transcended during the course of virtuosic performance; others suggest that Wittgenstein successfully "passed" as two-handed. A study of Wittgenstein's numerous one-hand arrangements reveals similar narratives: the pianist often attempted to imitate the sound of two-handed piano music, and many of his own keyboard exercises train his one hand to assume the load of two. The "deficiency" model can be seen most dramatically in three attempts to arrange Witt-genstein's commissions for left-hand piano into a more "normal" performance medium: Sergei Prokofiev's expressed (but abandoned) interest in arranging his left-hand piano concerto for piano two-hands, Alfred Cortot's completed draft of a two-hand arrangement of Ravel's Concerto pour la main gauche, and, most significantly, Friedrich Wührer's highly successful two-hand arrangements of Franz Schmidt's left-hand pieces for Wittgenstein, which explicitly adopt a program of "strengthening" and "filling in" the supposed weaknesses of a disabled performance medium. Yet, despite the stigma it may have accrued, one-handed pianism is but a more prominent, more public example of the "bodily limits" all performers must confront; similar discourse surrounds the deficiencies of small hands or stiff fingers, for example. For the performer's body must negotiate its corporeal finitude with the complex demands of the musical score. As seen here in the career of Wittgenstein, an aesthetics of disabled performance presents this dialectic in heightened microcosm.


2011 ◽  
Vol 462-463 ◽  
pp. 461-466 ◽  
Author(s):  
Shahrum Abdullah ◽  
S.N. Sahadan ◽  
Mohd Zaki Nuawi ◽  
Zulkifli Mohd Nopiah

The wavelet transform is well known for its ability in vibration analysis in fault detection. This paper presents the ability of wavelet transform in fatigue data analysis starts from high amplitude events detection and it is then followed by fatigue data extraction based on wavelet coefficients. Since the wavelet transform has two main categories, i.e. the continuous wavelet transforms (CWT) and the discrete wavelet transform (DWT), the comparison study were carried out in order to investigate performance of both wavelet for fatigue data analysis. CWT represents by the Morlet wavelet while DWT with the form of the 4th Order Daubechies wavelet (Db4) was also used for the analysis. An analysis begins with coefficients plot using the time-scale representation that associated to energy coefficients plot for the input value in fatigue data extraction. Ten extraction levels were used and all levels gave the damage difference, (%∆D) less than 10% with respect to original signal. From the study, both wavelet transforms gave almost similar ability in editing fatigue data but the Morlet wavelet provided faster analysis time compared to the Db4 wavelet. In comparison to have the value of different at 5%, the Morlet wavelet achieved at L= 5 while the Db4 wavelet at L=7. Even though it gave slower analysis time, both wavelets can be used in fatigue data editing but at different time consuming.


ICONI ◽  
2019 ◽  
pp. 92-101
Author(s):  
Irina V. Alexeyeva ◽  
◽  
Olga Yu. Kirsanova ◽  

One of the interesting realms of contemporary musicology is the issue of study and evaluation of the historical musical text of the early classical period, remote from us in terms of time. No less signifi cant is the comprehension of its didactic potential, as well as the adaptation of scholarly results of research and their application in pedagogical practice. More relevant is the study of the techniques of interaction on the part of the performer with this musical text. The article acquaints the readers with the unique album for clavier, absent in Russian performing and instructive practice — “Die Notenbücher der Geschwister Mozart” in its original version. Its study presents the possibility to immerse into the specifi city of the artistic content and pedagogical “secrets” of one of the opuses of the instructive direction refl ecting the specifi city of 18th century instrumental music-making. Analytical immersion into the musical text of the “Notebooks” (such is the version of the translation of the title of the analogous albums of J.S. Bach, according to Russian publishers) as a historical document of the epoch is aided by turning to its “intonational-lexical vocabulary” stipulated by culturological context. The album discloses the practical secrets of adaptation of the musical score form of notation in its transcription into two-lined form and demonstrated signs of the reduction of the musical text in correspondence with the peculiarities of keyboard instruments. For a present-day beginning performer, the creative potential of the pieces in the collection consists in the possibility of reverse unfolding of two-line keyboard music into an ensemble score the means of which have been fi xated into the musical text.


Author(s):  
M.S. Lynnyk

Under consideration are various facets of the creative work of Rostislav Genika, a comprehensively educated musician, universally gifted personality, one of the founders of the Kharkov piano school. The research is based on the study of critical reviews of R. Genika’s and his students’ concerts. Under analysis is the main genre of R. Genika as a composer and pianist – a transcription represented by the piece “Concert Paraphrase” to the motive of “Kupava’s Complaints” from P. Tchaikovsky’s music to the play “The Snow Maiden” by A. Ostrovsky. Rostislav Genika (1859 – 1942?) focused on piano art, which can be considered the key basis of all his theoretical, historical and musical-critical generalizations and conclusions, as well as practical activities as a performer, teacher and composer. The education received by R. Genika in the class of N. Rubinstein at the Moscow Conservatory prompted the Kharkov musician to pay tribute to piano performance in the early stages of his career. The information about the pianist R. Genika, which came to us from publications in the press and the memoirs of his colleagues, gives an opportunity to reconstruct, although not in full, the style of his piano playing as a soloist, ensemble performer and accompanist. All this together constituted the subject of a comprehensive review and the relevance of this article. The research material includes reviews of R. Genika’s concerts and an example of his composer’s heritage in the field of piano music – a transcription “Concert Paraphrase” to the motive “Kupava’s Complaints” from P. Tchaikovsky’s music to the play “The Snow Maiden” by A. Ostrovsky. The purpose of the paper is to reveal the universalism of the composer’s talent, the scale of his work, which was mainly focused on piano performance, through the analysis of various aspects of Rostislav Genika’s creative work. It would be wrong to call R. Genika a concert pianist in the traditional sense of the word. He had few solo concerts in his practice and they refer to the very beginning of his work career in Kharkov. As a concertist, he mostly performed works mastered in the class of N. Rubinstein, as well as piano parts in various ensembles, learnt by him when playing with “K. Gorsky Quartet” and other ensemble performers. The piano repertoire of R. Genika included pieces by I. S. Bach, G. Handel, D. Scarlatti, L. van Beethoven, K. M. Weber, F. Liszt, F. Chopin, R. Schumann, M. Mussorgsky, P. Tchaikovsky and others. Raised on the best examples of piano music, R. Genika appreciated such an interpretation that would meet not only the criteria of "accuracy", but would also be spiritually filled, sublimely emotional, and not outwardly ostentatious. Since the first days of working in Kharkov R. Genika, was able to combine lecturing, performing and correspondent activities with piano pedagogy. The sphere of pedagogy was one of the prevailing and time-consuming in his life. There is quite little information about R. Genika as a teacher and it can be found mainly in the reviews of his students’ concerts, in the notes of the local press as well as in the reports on academic concerts and exams at Kharkov Music College and Conservatory. The personal pianistic experience of R. Genika and the pedagogical style of his teacher N. Rubinshtein affected the choice of virtuoso programs and concert programs for his students. R. Genika’s composing experiments are closely related to his concert-pianistic and pedagogical work, as well as to the study of piano music history. The circle of his genre interests in this area was quite symptomatic. As an ardent supporter of concert pianism traditions R. Genika considered the genre of transcriptions and arangementds in the Liszt-Talberg spirit to be a new wave in piano literature of that time, a promising direction. This is how his transcriptions to the motives from “Parsifal” by R. Wagner, a piano arrangement of the “Arabic Dance” from the “Nutcracker” by P. Tchaikovsky, a fantasy “Abyss” to the motive of E. Grieg appeared. R. Genika also wrote short pieces intended for his concerts, as well as for educational practice. Unfortunately, the score of these works are still either not found or not preserved. An exception is the “Concert Paraphrase” to the motive of “Kupava’s Complaints” from P. Tchaikovsky’s music to the play “Snow Maiden” by A. Ostrovsky (author’s handwritten text dedicated to the pianist V. Timanova). Being a pianist was very important for R. Genika. Understanding pianism as a musical aesthetic phenomenon resulted in a multifaceted and deep understanding of the essence of musical art, which was characteristic of R. Genika as a music educator. The musician thought of himself precisely as a “generalist” who could handle any music profession – a performer’s, teacher’s, or researcher’s one. Hence, further study of the creative and critical heritage of R. Genika will invariably affect the spheres of other areas of musical art (opera, chamber, etc.). Such universal personalities as R. Genika have always been an engine for the musical-historical process, idea generator of the era. Nowadays such universal musicians, who would be a kind of "litmus test" of their time and faithfully served the art, are still in need. One of such outstanding figures in Ukraine, a universal personality was Valerii Oleksandrovych Bohdanov (07/13/1939 㶹– 10/10/2017) – performer, teacher, scientific researcher, composer. His multifaceted activities encompassed a wide range of musical art and were reflected in many years of pedagogical work, a large number of research works, transcriptions, and composer’s experiments. We would like to hope that this anniversary collection dedicated to V. Bogdanov will serve as a prelude to a deep and comprehensive study of the life and work of this bright and extraordinary musician.


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