{"id":1063,"date":"2023-04-05T11:21:23","date_gmt":"2023-04-05T10:21:23","guid":{"rendered":"http:\/\/amir-shahabi.com\/m1\/?p=1063"},"modified":"2023-03-15T12:29:22","modified_gmt":"2023-03-15T12:29:22","slug":"musical-instruments-recognition-by-digital-circuit","status":"publish","type":"post","link":"https:\/\/amir-shahabi.com\/m\/en\/musical-instruments-recognition-by-digital-circuit\/","title":{"rendered":"Musical Instruments Recognition by Digital Circuit"},"content":{"rendered":"<section class=\"kc-elm kc-css-386821 kc_row\"><div class=\"kc-row-container  kc-container\"><div class=\"kc-wrap-columns\"><div class=\"kc-elm kc-css-513876 kc_col-sm-12 kc_column kc_col-sm-12\"><div class=\"kc-col-container\"><div class=\"kc-elm kc-css-885601 kc_text_block\"><\/p>\n<p>Multichannel audio can provide immersive environment the listener by rendering surround audio. But such audio resolution takes more effort on recording tracks from multiple microphones for content production. Multichannel audio synthesize significantly reduces the excessive size requirement of the set of signals for transmission medium.<\/p>\n<p>\n<\/div><div class=\"kc-elm kc-css-702430 kc_shortcode kc_single_image\">\n\n        <img decoding=\"async\" src=\"https:\/\/amir-shahabi.com\/m\/wp-content\/uploads\/2023\/03\/2-3-1024x641.jpg\" class=\"\" alt=\"Single Image\" \/>    <\/div>\n<div class=\"kc-elm kc-css-287791 kc_text_block\"><\/p>\n<p>In multichannel audio synthesis, the instrument enhancement technique plays an important role since it can improve the performance of virtual spot microphones that often used to capture individual instruments. One of the well-developed methods is spectral conversion based Guassian mixture model. By considering the spectral vectors sequence of a given signal as a realization of random vector x defined with probability density function, the problem will become finding a proper transfer function ,which , when applied to input vector x produces a vector close in some sense to target vector, in this case, the selected and enhanced instrument track.<\/p>\n<p>\n<\/div><div class=\"kc-elm kc-css-300341 kc_shortcode kc_single_image\">\n\n        <img decoding=\"async\" src=\"https:\/\/amir-shahabi.com\/m\/wp-content\/uploads\/2023\/03\/2-4-300x169.jpg\" class=\"\" alt=\"Single Image\" \/>    <\/div>\n<div class=\"kc-elm kc-css-685595 kc_text_block\"><\/p>\n<p>Based on my experiences, the spectral conversion algorithms that have been successfully employed to speech synthesis applications are basically used to achieve the instruments recognition and enhancement. Also, some adaptive algorithms will be proposed to strengthen the robustness and improve the performance of the enhancement.<\/p>\n<p>My main focus in this project is, to implement instruments that recognize processing of several musical pieces that consists of several instruments. Then the validation will be via both signal analysis and listening tests. The expected results of the classification of musical pieces can be observed by system output and human auditory system.<\/p>\n<h2>\u00a0<\/h2>\n<p>\n<\/div>\n<div class=\"kc-elm kc-css-329298 kc-title-wrap \">\n\n\t<h3 class=\"kc_title\">The main subjects are:<\/h3>\n<\/div>\n<div class=\"kc-elm kc-css-162036 kc_text_block\"><\/p>\n<p>Frequency Scale Conversion<\/p>\n<p>Fourier, DCT and Hartley Transforms<\/p>\n<p>Random Number Generation<\/p>\n<p>Probability Density Functions<\/p>\n<p>Vector Distance<\/p>\n<p>Calculate psychometric function<\/p>\n<p>Speech Synthesis and Speech Enhancement<\/p>\n<p>Speech Coding<\/p>\n<p>Signal Processing<\/p>\n<p>Calculates entropy and conditional entropy for discrete and continuous distributions<\/p>\n<p>Voice box Parameters and System Interface<\/p>\n<p>Utility Functions<\/p>\n<p>Functions that return the sin and cos of the angle<\/p>\n<p>Calculates log(sum(exp(x))) without overflow problems<\/p>\n<p>\n<\/div><\/div><\/div><\/div><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,1],"tags":[],"class_list":["post-1063","post","type-post","status-publish","format-standard","hentry","category-electronic","category-uncategorised"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.0 (Yoast SEO v20.5) - 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