2017:Audio Key Detection Results

Introduction

This page contains the results of the 2017 edition of the MIREX automatic key detection estimation task.

What’s new?

• The NEMA system was retired this year, since a bug has been found in the calculation of the results. Keys with tonics related by a fifth and the same mode (a.k.a. adjacent keys) are supposed to get a score of 0.5, but only ascending fifths (going from ground-truth to estimation) were counted, not descending ones. It has been brought to my attention that the description of the measure on the wiki has been ambiguous for years, and probably the NEMA implementer got confused by this. However, the intention has always been to count ascending and descending fifth (or fourth) relationships between the tonics (in my humble opinion).
• New datasets: "PresegmentedKeyIsophonics" and "PresegmentedKeyRobbieWilliams" use the local key annotations for the Isophonics set and the Robbie Williams set, but have been split into separate files according to the local key annotations. The segments annotated with major and minor modes have been retained and were presented to the submissions. Therefore their results are slightly optimistic in the sense that the segments are guaranteed to contain just a single key, which is not the case for real-world songs. Keep also in mind that some files are strongly correlated (different segments or even repeated chorusses of the same song). Any statistical analysis of the results (e.g. pairwise significance tests) that relies on independence between files is consequently invalid.
• New dataset: "Billboard2012Key" is the subset of the Billboard2012 chord dataset for which it was possible to derive the key automatically from the chord annotations (using the procedure outlined by Korzeniowski & Widmer in their 2017 EUSIPCO paper). The annotations are freely available

Submissions

	Abstract	Contributors
BD1, BD2	PDF	Gilberto Bernardes, Matthew Davies
CN1	PDF	Chris Cannam, Katy Noland
FK1	PDF	Filip Korzeniowski
HS1-HS3	PDF	Hendrik Schreiber
PRGR5	PDF	Adam Pluta, Marcin Gawrysz

Results

Summary

All figures can be interpreted as percentages and range from 0 (worst) to 100 (best).

Note: until the table display problems are resolved, you can download the results from my personal website. --Johan

MIREX2005Key

Algorithm	Mirex	Correct	Adjacent	Relative	Parallel	Chromatic	Other
BD1	84.84	75.80	15.42	3.75	1.04	0.16	3.83
BD2	58.44	42.97	12.30	30.27	1.20	0.00	13.26
CN1	88.07	82.75	8.31	2.72	1.76	0.08	4.39
FK1	80.19	70.77	15.73	3.43	2.64	0.08	7.35
HS1	80.25	68.69	18.61	6.71	1.20	0.00	4.79
HS2	65.85	50.32	13.82	27.40	2.00	0.16	6.31
HS3	66.96	52.16	12.06	28.19	1.60	0.16	5.83
PRGR5	[]

download these results as csv

GiantStepsKey

Algorithm	Mirex	Correct	Adjacent	Relative	Parallel	Chromatic	Other
BD1	59.62	46.03	19.87	9.44	4.14	1.66	18.87
BD2	71.84	65.40	7.45	5.96	4.64	3.15	13.41
CN1	50.53	39.74	11.92	13.24	4.30	2.65	28.15
FK1	74.11	67.38	7.45	7.12	4.30	3.15	10.60
HS1	69.35	62.09	8.44	7.28	4.30	3.31	14.57
HS2	27.02	9.11	2.81	45.53	14.24	0.00	28.31
HS3	46.64	33.44	4.47	32.12	6.62	1.66	21.69
PRGR5	[]

download these results as csv

PresegmentedKeyIsophonics

Algorithm	Mirex	Correct	Adjacent	Relative	Parallel	Chromatic	Other
BD1	75.06	65.98	13.56	5.06	3.91	2.30	9.20
BD2	46.69	32.87	3.45	30.80	14.25	1.38	17.24
CN1	64.99	55.40	13.56	4.60	7.13	3.91	15.40
FK1	70.85	62.53	8.28	6.44	11.26	1.84	9.66
HS1	64.05	54.25	7.82	14.25	8.05	1.61	14.02
HS2	67.93	56.78	10.57	18.62	1.38	1.61	11.03
HS3	70.23	59.77	8.74	18.62	2.53	1.61	8.74
PRGR5	[]

download these results as csv

PresegmentedKeyRobbieWilliams

Algorithm	Mirex	Correct	Adjacent	Relative	Parallel	Chromatic	Other
BD1	70.79	64.55	6.88	8.99	0.53	2.65	16.40
BD2	56.83	46.56	8.99	16.40	4.23	2.65	21.16
CN1	62.28	53.97	10.58	7.94	3.17	7.41	16.93
FK1	76.30	68.25	12.17	3.70	4.23	0.00	11.64
HS1	77.14	68.78	10.05	8.99	3.17	0.00	8.99
HS2	67.78	52.38	11.11	31.75	1.59	0.00	3.17
HS3	70.53	56.61	10.05	28.57	1.59	0.00	3.17
PRGR5	[]

download these results as csv

Billboard2012Key

Algorithm	Mirex	Correct	Adjacent	Relative	Parallel	Chromatic	Other
BD1	78.84	67.12	18.49	5.48	4.11	0.68	4.11
BD2	46.71	29.45	3.42	41.78	15.07	0.00	10.27
CN1	67.40	58.22	12.33	5.48	6.85	6.85	10.27
FK1	78.22	69.86	6.85	6.85	14.38	0.00	2.05
HS1	74.79	65.75	6.85	10.96	11.64	0.00	4.79
HS2	82.33	75.34	7.53	10.27	0.68	0.00	6.16
HS3	81.85	73.97	9.59	10.27	0.00	0.68	5.48
PRGR5	16.03	3.42	4.11	24.66	15.75	2.05	50.00

download these results as csv

The submission PRGR5 is currently not able to complete the task without crashing, but hopefully this can still be remedied. These tables will be updated as soon as this is the case.

Note

This page will be further updated with more detailed info and extended results (extra statistics, per-file results, confusion matrices) once I get back to a country where the wifi is better and Google's services aren't blocked (which includes the captcha's for this bloody wiki). That will be around November 10th. --Johan