following.


39 views
Uploaded on:
Category: Sports / Games
Description
2) sounds prone to happen on beats. 3) cadenced example formats. 4) ... what's more, musical meter investigation,
Transcripts
Slide 1

Mcgill college :: music innovation :: mumt 611 >> beat following

Slide 2

… WHAT IS BEAT TRACKING? 0/17

Slide 3

What is beat following? Info sound … enchantment box … yield tatum areas 1/17

Slide 4

What is beat following? "… Estima(tion) of the conceivably time-differing rhythm and areas of every beat. In Engineering terms, this is the recurrence and Phase of a period shifting sign , the period Of Which is zero at a beat area (I.e., where One would tap one\'s foot)." Hainsworth, 2006 2/17

Slide 5

Overview >> Motivation & definitions … early work … Discrete versus ceaseless discovery capacities … authoritative work: scheirer … autocorrelation versus brush sifting … Exemplar Methods … Persistent issues … >> >> >> >> >> >> 3/17

Slide 6

Motivation & definitions >> Auto backup Synchronization of 2 streams Cd skipping recuperation Time-scaling calculations Tempo-synchronous impacts/control Database recovery closeness >> >> >> >> >> >> 4/17

Slide 7

Motivation & definitions Blimes divisions of musical planning … metrical structure … rhythm variety … timing deviations … arrhythmic areas 3 hierarchal levels of metrical structure … Tempo … tactus … tatum Beat following/Tempo incitement >> >> >> 5/17

Slide 8

Approach diagram >> >> Rule based … steedman (1977) … parncutt (1994) Autocorrelation … Brown (1993) … * Davies & Plumbley (2005) Oscillating channels … *Large (1994) … * Scheirer (1998) histogramming … *seppanen (2001) Multiple specialist … *goto (1995) … Dixon (2001) probabilistic … hainsworth & macleod (2003) … * klapuri (2003) >> >> >> >> Red sound Black typical * causal = 6/17 =

Slide 9

Early Work >> music discernment and comp sci (1980\' s ) Most early work with midi/typical information Rule based >> >> 7/17

Slide 10

Early Work >> steedman (1977) substantial (1994) Goto (1995) Scheirer (1998) M I D I >> >> A U D I O >> . . . >> 8/17

Slide 11

Discrete df versus nonstop df >> Discrete recognition capacity … limited onset focuses, or IOI (between onset interims) … Suited for monophonic signs … step 1: Created by different near time or time-freq methods … step 2: crest picking system Continuous discovery capacity … better for obscure onset densities … same as step 1 above … further preparing required for essential results >> 9/17

Slide 12

Scheirer . Brush filterbank recurrence filterbank Continuous encompassing . . Filt_1 Env_1 . . . Filt_2 . Filt_3 . . . . . . Information sound Sum fltbks . . . . Filt_4 . . . . Filt_5 . . . Filt_6 Peak pick 10/17

Slide 13

ACF versus Comb filt . Brush channels * Phase Alignment in 2 nd step Commonality not given straightforwardly Meter estimation by means of decim. & aggregate Less costly Automatic stage arrangement Possible tempi at multi & fracs Meter estimation specifically profit >> >> >> >> >> >> >> 11/17

Slide 14

victor goto freq fltrbk Multi specialists Sub_1 Input sound period adjust Sub_2 Dscrt Onset det Cross corr Sub_3 Acf . . . Earlier kn0w Sub_7 Prior information: 1) successive ioi is likely ibi 2) sounds prone to happen on beats 3) cadenced example formats 4) harmony layouts for non-perc music 12/17

Slide 15

HMM Bar beat tatum S n-1 S n | P(s n q n ) Observable variable adapted by current state = klapuri . Period & Align estim freq fltrbk standard Pwr env . . Brush fltrbk Filt_01 Chan_1 Input sound Filt_02 . Chan_2 . . . . Filt_03 . Chan_3 . . . Train information Chan_4 Filt_36 Training information cadenced example formats = 13/17

Slide 16

Davies & plumbley . . . . periodicity arrangement . . Brush fltrbk Comb fltrbk . . Cont Detect func . . Info sound . . . . . . acf . . Cont dep state Gen state 2 state model 14/17

Slide 17

correlation permitted crude Cml% Tot% Cml% Tot% 23.8 38.9 29.8 48.5 scheirer 55.9 61.4 71.2 80.9 klapuri Davies & plumbley 54.8 61.2 68.1 78.9 Raw Cml right metrical level, coherence required crude tot right metrical level, congruity not required Allowed cml 1/2 & 2x rhythm permitted, progression required Allowed cml 1/2 & 2x beat permitted, congruity not required = 15/17

Slide 18

Persistent issues Areas for future work >> Periodicity exchanging Half/twofold time Alignment issues Expressive planning Non-percussive music >> >> >> >> 16/17

Slide 19

conclusions much advance has been made through a few methodologies Possible New strategies for extricating periodicity and stage we have to take a shot at enhancing the heartiness of figurings >> >> >> Thank you for your time! 17/17

Slide 20

references Davies, M.E.P., M. Plumbley. "Setting subordinate beat following of musical Audio," IEEE Transactions on Audio, Speech and Language Processing, 15(3), 2007, pp. 1009-20. Goto, M. "An investigation of ongoing beat following for musical sound signs." PhD theory, waseda college, 1998. Hainsworth, s.w. "beat following and musical meter examination," in Signal preparing techniques for music translation, altered by a. Klapuri, and M. Davy, 101-129. New york: Springer science and business media, 2006 Hainsworth, s.w. "systems for the computerized investigation of musical sound", PhD theory, division of building, college of cambridge, 2004. KLAPURI, A. "SIGNAL PROCESSING METHODS FOR THE AUTOMATIC TRANSCRIPTION OF MUSIC" PHD THESIS, TAMPERE UNIVERSITY OF TECHNOLOGY, 2004. Scheirer, e. "music listening frameworks", PhD proposition Massachusetts foundation of Technology, 2000.

Recommended
View more...