Investigate impact of beats in RumNBass & AngelVoices that have a length other than 1

[rigdern]

Some songs have Spotify analysis files with beats that have a length other than 1 beat. Here’s what I’m wondering:

• Why isn’t each beat’s duration 1 beat? Is it a bug in Spotify’s analysis data?
• When we generate a remix, does this result in noticeable seams when the audio jumps from one beat to another?
  • InfiniteRemix.BeatAlignedObject shifts slices such that every slice starts and ends on a beat. Is this problematic? Does it result in noticeable seams when the audio jumps from one beat to another?
• When loading a Spotify analysis file, should we consider filtering out the beats that have a duration that isn’t 1?

RumNBass

Below is the list of beats in RumNBass that have a duration that isn’t 1. It was generated by EvalProgram.GenerateSongCatalogCompatibilityReport.

Table of RumNBass beats that have a length other than 1.

Timestamp (seconds)	Beat duration (in beats)
0.39489	1.313511913
0.99176	1.316482813
1.58998	1.317671173
2.18875	1.314106093
2.78588	1.315294453
3.38356	1.326627887
3.98639	1.334968413
4.59301	1.336156773
5.20017	1.333780053
5.80625	1.330192967
6.4107	1.333163867
7.01649	1.335540587
7.62337	1.33433022
8.2297	1.33433022
8.83603	1.3349244
9.44263	1.337279113
10.0503	1.3408662
10.6596	1.337279113
11.26727	1.331909487
11.8725	1.3342642
12.4788	1.335430553
13.08563	1.33300982
13.69137	1.332371627
14.29681	1.330523067
14.90141	1.32984086
15.5057	1.33452828
16.11212	1.335606607
16.71903	1.334902393
17.32561	1.33716908
17.93324	1.334704333
18.53974	1.33267972
19.14532	1.33697102
19.75285	1.333978113
20.35902	1.330413033
20.96357	1.3316234
21.56867	1.329884873
22.17297	1.329928887
22.7773	1.331931493
23.38254	1.33241564
23.98799	1.334836373
24.59455	1.334880387
25.20113	1.333758047
25.8072	1.333824067
26.4133	1.33505644
27.01996	1.336288813
27.62719	1.332173567
28.23253	1.332195573
28.8379	1.335804667
29.4449	1.335232493
30.05164	1.33406614
30.65785	1.334704333
31.26435	1.33532052
31.87113	1.337719247
32.479	1.337675233
33.08685	1.334044133
33.69305	1.332173567
34.29841	1.335804667
34.9054	1.335958713
35.51247	1.331909487
36.1177	1.331931493
36.72294	1.333163867
37.32874	1.335606607
37.93566	1.338049347
38.54368	1.3355846
39.15058	1.333626007
39.75659	1.335870687
40.36361	1.336266807
40.97082	1.335958713
41.5779	1.338071353
42.18592	1.339567807
42.79463	1.336905
43.40213	1.334242193
44.00843	1.333383933
44.61433	1.33089718
45.2191	1.329730827
45.82334	1.326187753
46.42597	1.323855047
47.02754	1.3293127
47.63158	1.331777447
48.23675	1.32951076
48.84089	1.337983327
49.44888	1.341108273
50.05829	1.33769724
50.66615	1.33664092
51.27353	1.331997513
51.8788	1.3332739
52.48464	1.3398759
53.09349	1.333978113
53.69967	1.326891967
54.30261	1.331117247
54.90748	1.335364533
55.51428	1.337257107
56.12194	1.3355846
56.72884	1.332723733
57.33444	1.330457047
57.93901	1.334154167
58.54526	1.337257107
59.15292	1.33380206
59.75901	1.331513367
60.36405	1.33340594
60.96997	1.33175544
61.57512	1.33307584
62.18088	1.336156773
62.78805	1.332657713
63.39361	1.330919187
63.99839	1.330391027
64.60293	1.329818853
65.20721	1.33578266
65.8142	1.3375652
66.42201	1.33281176
67.02764	1.334572293
67.63408	1.336949013
68.2416	1.337521187
68.84938	1.34047008
69.4585	1.337477173
70.06626	1.333890087
70.67239	1.335672627
71.27934	1.333317913
71.88521	1.330391027
72.48976	1.334638313
73.09623	1.3359147
73.70328	1.33300982
74.30901	1.33367002
74.91504	1.3319535
75.52029	1.3296428
76.12449	1.33446226
76.73088	1.335078447
77.33755	1.329136647
77.94152	1.329158653
78.5455	1.328564473
79.14921	1.327376113
79.75238	1.329158653
80.35636	1.328564473
80.96007	1.32878454
81.56388	1.263732833
82.13812	1.19865912

AngelVoices

Below is the list of beats in AngelVoices that have a duration that isn’t 1. It was generated by EvalProgram.GenerateSongCatalogCompatibilityReport:

Table of AngelVoices beats that have a length other than 1.

Timestamp (seconds)	Beat duration (in beats)
144.76611	1.19977719
145.19972	1.301185907
145.66998	1.402566955
146.17688	1.503948003
146.72041	1.505331478
147.26447	1.500074273
147.8066	1.496145204
148.34732	1.505663512
148.8915	1.512497879
149.43811	1.51797644
149.98672	1.499271858
150.52856	1.47647219
151.06218	1.491275372
151.60115	1.496698594
152.14207	1.488674439
152.68008	1.483334226
153.21619	1.480484267
153.75124	1.485464777
154.2881	1.510588683
154.83405	1.522292882
155.38422	1.532585936
155.9381	1.510644022
156.48405	1.50743436
157.02887	1.503090249
157.57208	1.509592581
158.11768	1.509426564
158.6632	1.484966726
159.19987	1.471242654
159.73158	1.485713803
160.26855	1.493350585
160.80826	1.499659231
161.35025	1.497777705
161.89156	1.47312418
162.42397	1.465736424
162.95369	1.446395443
163.47643	1.433501456
163.9945	1.427497175
164.51042	1.423789462
165.02498	1.433639804
165.5431	1.451043919
166.06754	1.460617566
166.59541	1.480567276
167.1305	1.500710672
167.67288	1.503200927
168.21614	1.507046987
168.7608	1.490971008
169.29964	1.471325663
169.83139	1.44769591
170.3546	1.428188912
170.87076	1.432505354
171.38847	1.430402472
171.90544	1.427248149
172.42126	1.436019381
172.94025	1.459510786
173.46774	1.490887999
174.00656	1.519774957
174.55582	1.516814321
175.104	1.510118302
175.64978	1.508707157
176.19504	1.50466741
176.73885	1.500655333
177.28119	1.492575839
177.82063	1.481895412
178.35619	1.480511937
178.89127	1.493654949
179.43109	1.490943338
179.96992	1.494817068
180.51018	1.500046604
181.0523	1.49747334
181.5935	1.500489316
182.13579	1.495757831
182.67638	1.498967493
183.21811	1.491773423
183.75725	1.507102326
184.30194	1.500129612
184.8441	1.502426181
185.38708	1.513826015
185.9342	1.511778472
186.48058	1.500572324
187.02289	1.510367327
187.56876	1.499078171
188.11053	1.500766011
188.65292	1.396036953
189.15746	1.295707346
189.62575	1.195405409