Filosax_Lite

The Filosax dataset was conceived, curated and compiled by Dave Foster (a PhD student on the AIM programme at QMUL) and his supervisor Simon Dixon (C4DM @ QMUL).

The full dataset is a collection of 48 multitrack jazz recordings, where each piece has 8 corresponding audio files:

1) The original Aebersold backing track (stereo) - which needs to be purchased separately

2) Bass_Drums, a mono file of a mix of bass and drums

3) Piano_Drums, a mono file of a mix of piano and drums

4) Participant 1 Sax, a mono file of solo saxophone

5) Participant 2 Sax, a mono file of solo saxophone

6) Participant 3 Sax, a mono file of solo saxophone

7) Participant 4 Sax, a mono file of solo saxophone

8) Participant 5 Sax, a mono file of solo saxophone

This "lite" version has only 2 tracks and 2 participant recordings for each.

For each piece, there is a corresponding .jams file containing piece-level annotations:

1) Beat annotation for the start of each bar and any mid-bar chord change

2) Chord annotation for each bar, and mid-bar chord change

3) Section annotation for when the solo changes between the 3 categories:

a) head (melody)

b) written solo (interpretation of transcribed solo)

c) improvised solo

For each Sax recording, there is a corresponding .json file containing note annotations:

1) (float) a_start_time, a_end_time, a_duration: the time stamps of the start, end and duration of the note, in seconds

2) (int) piece_num and bar_num: the parent piece and bar number of the start of the note

3) (string) musician: the participant ID

4) (int) bar_type: the section annotation where 0 = head, 1 = written solo, 2 = improvised solo

5) (float) s_start_time and s_duration: the time stamps of the score representation, in seconds

6) (int) crochet_num: the number of sub-divisions which define a crochet (always 24)

7) (int) s_rhythmic_position and s_rhythmic_duration: the start and duration of the score note (compared to crochet_num)

8) (int) midi_pitch: the quantised midi pitch

9) (bool) is_grace: is the note a grace note, associated with the following note

10) (int) num_chord_changes: the number of chords which accompany the note (usually 1, sometimes >1 for long notes)

11) (dict{int, [int, int, int]}) chord changes: the chords, where the key is the rhythmic position of the chord (using crochet_num) and the value a list [a, b, c], where:

a: chord_root (0 = C, 1 = C#... 11 = B)

b: chord_bass (0 = C, 1 = C#... 11 = B)

c: chord_type (0 = maj7, 1 = maj7#11, 2 = 6/9, 3 = 7, 4 = 7b9, 5 = 7#11, 6 = min7, 7 = min(maj7), 8 = dim, 9 = 1/2 dim)

(An additional chord is added in the case of a quaver at the end of the bar, followed by a rest on the downbeat)

12) (int) main_chord_num: usually 0, sometimes 1 in the quaver case described above

13) ([int]) scale_changes: the degree of the chromatic scale when midi_pitch is compared to chord_root

14) (float) loudness_max_val and loudness_max_time: the value (db) and time (seconds) of the maximum loudness (could be used for onset value)

15) ([float]) loudness_curve: the inter-note loudness values, 1 per millisecond

16) (float) pitch_average_val and pitch_average_time: the value (midi) and time (seconds) of the average pitch

17) ([float]) pitch_curve: the inter-note pitch values, 1 per millisecond

18) (float) pitch_vib_freq and pitch_vib_ext: the vibrato frequency (Hz) and extent (midi), both 0.0 if no vibrato detected

19) (float) spec_cent and spec_flux: the spectral centroid and spectral flux values at the time of the maximum loudness

20) ([float]) spec_cent_curve and spec_flux_curve: the inter-note timbre values, 1 per millisecond

The Participant folders also contain MIDI files of the transcriptions (frame level and score level) as well as a PDF and MusicXML of the typeset solo.