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Free Raisins Over Time

May 19th, 2012
contra, free_raisins, experiment, music

I'm a big fan of recording yourself when you play so you can listen and improve. With the Free Raisins I record most of our dances and we often listen to them on the way home. It's especially helpful when you disagree about what went wrong somewhere: it's hard to fix if you don't know what the problem is.

I was recently listening to the recording from our first gig, nearly two years ago, and I thought "this doesn't sound that different". I was curious: have we improved over time? We've definitely gotten better at playing to the dancers, matching tunes and dances, communicating, dealing with problems, and running our own sound, but do we play better music now?

I decided to test this. I took 100 twenty second samples randomly from our recordings, level matched them with sox, and went through them in random order, giving them ranks on a scale from 1-10. Then I asked Julia to do the same. [1] I graphed them against time:

Jeff:

8/2010  9/2011  10/2011  11/2011  12/2011  12/2011  2/2012  2/2012  2/2012  2/2012  3/2012 
8 8 8 8
7 7 7 7 7 7 7 7 7 7 7 7 7
6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6
5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
3 3 3 3 3 3 3 3
2 2

Julia:

8/2010  9/2011  10/2011  11/2011  12/2011  12/2011  2/2012  2/2012  2/2012  2/2012  3/2012 
9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9
8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8
7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
6 6 6 6 6
5 5

This is kind of disappointing: it looks like we've not improved much. Maybe a little, but nothing major. Or you could see it as positive: we were well prepared for our first gig and played well from the start!

Julia and I also disagreed a lot; 10% of the time our Z-Scores differed by more than two standard deviations. [2]


[1] The raw data:
SampleDateJeffJeff Z-ScoreJuliaJulia Z-Score
200002011-12-1182.2480.19
200012011-12-115-0.165-3.62
200022011-10-1160.647-1.08
200032011-12-184-0.967-1.08
200042011-12-113-1.7680.19
200052011-11-1260.6480.19
200062011-10-113-1.7680.19
200072012-02-184-0.9680.19
200082011-09-245-0.1691.46
200092012-02-094-0.9691.46
200102011-11-1271.447-1.08
200112011-12-114-0.967-1.08
200122011-12-185-0.1680.19
200132012-02-185-0.1680.19
200142012-02-015-0.1680.19
200152010-08-1360.6491.46
200162011-12-115-0.1691.46
200172012-02-0171.4491.46
200182011-11-123-1.7691.46
200192011-12-185-0.1680.19
200202012-02-184-0.9680.19
200212012-03-1071.4480.19
200222012-02-1860.647-1.08
200232011-12-1871.4491.46
200242011-12-184-0.967-1.08
200252011-09-2460.6480.19
200262011-12-1860.646-2.35
200272012-03-105-0.1680.19
200282011-11-1260.6480.19
200292012-02-185-0.1680.19
200302012-02-0482.2480.19
200312012-02-094-0.967-1.08
200322012-02-013-1.7680.19
200332011-11-1260.6480.19
200342011-12-184-0.967-1.08
200352011-09-245-0.1691.46
200362011-12-1171.4491.46
200372011-09-243-1.766-2.35
200382012-02-0960.6480.19
200392012-02-014-0.9680.19
200402012-02-094-0.967-1.08
200412012-03-105-0.1680.19
200422012-03-105-0.1680.19
200432011-11-1260.6491.46
200442012-03-104-0.9680.19
200452011-11-125-0.1680.19
200462011-12-1860.6480.19
200472012-02-095-0.1680.19
200482011-09-245-0.167-1.08
200492011-11-1260.647-1.08
200502012-03-1060.6491.46
200512011-11-125-0.167-1.08
200522012-03-102-2.567-1.08
200532012-02-0971.4480.19
200542012-02-0971.4480.19
200552012-03-1060.6480.19
200562010-08-1360.6491.46
200572012-02-044-0.966-2.35
200582012-03-104-0.9680.19
200592011-12-1171.4480.19
200602011-12-115-0.1680.19
200612012-02-0160.6491.46
200622012-02-095-0.1680.19
200632012-02-044-0.9680.19
200642011-12-185-0.1680.19
200652012-02-1871.4480.19
200662011-11-1271.4491.46
200672012-02-184-0.967-1.08
200682012-03-1060.6480.19
200692011-09-245-0.167-1.08
200702012-02-0971.4480.19
200712011-12-1160.6491.46
200722012-02-1860.6480.19
200732011-09-243-1.7680.19
200742011-11-124-0.967-1.08
200752012-02-1860.6480.19
200762011-10-1160.6491.46
200772012-02-184-0.9680.19
200782012-02-095-0.167-1.08
200792011-11-124-0.9680.19
200802011-10-113-1.767-1.08
200812012-02-095-0.167-1.08
200822012-03-1060.6480.19
200832012-02-014-0.9680.19
200842012-02-184-0.967-1.08
200852012-02-185-0.1680.19
200862011-09-245-0.1680.19
200872011-11-124-0.967-1.08
200882011-12-1160.646-2.35
200892011-11-124-0.967-1.08
200902010-08-135-0.1680.19
200912012-02-0960.6480.19
200922011-12-184-0.9680.19
200932011-11-125-0.1691.46
200942011-10-1171.4480.19
200952012-02-0482.2480.19
200962011-12-1860.6480.19
200972011-12-115-0.1680.19
200982011-12-1160.6480.19
200992011-11-1260.6491.46

[2] Data sorted by the difference in our Z-Scores:
SampleDisagreementJeffJeff Z-ScoreJuliaJulia Z-Score
200013.465-0.165-3.62
200183.223-1.7691.46
200262.9960.646-2.35
200882.9960.646-2.35
200102.5271.447-1.08
200092.424-0.9691.46
200952.0582.2480.19
200302.0582.2480.19
200002.0582.2480.19
200321.953-1.7680.19
200041.953-1.7680.19
200061.953-1.7680.19
200731.953-1.7680.19
200221.7260.647-1.08
200491.7260.647-1.08
200021.7260.647-1.08
200161.625-0.1691.46
200931.625-0.1691.46
200351.625-0.1691.46
200081.625-0.1691.46
200521.482-2.567-1.08
200571.394-0.966-2.35
200211.2571.4480.19
200651.2571.4480.19
200701.2571.4480.19
200541.2571.4480.19
200531.2571.4480.19
200591.2571.4480.19
200941.2571.4480.19
200581.154-0.9680.19
200441.154-0.9680.19
200771.154-0.9680.19
200201.154-0.9680.19
200071.154-0.9680.19
200631.154-0.9680.19
200831.154-0.9680.19
200391.154-0.9680.19
200921.154-0.9680.19
200791.154-0.9680.19
200810.925-0.167-1.08
200780.925-0.167-1.08
200510.925-0.167-1.08
200690.925-0.167-1.08
200480.925-0.167-1.08
200500.8260.6491.46
200610.8260.6491.46
200710.8260.6491.46
200990.8260.6491.46
200430.8260.6491.46
200760.8260.6491.46
200560.8260.6491.46
200150.8260.6491.46
200800.683-1.767-1.08
200370.593-1.766-2.35
200820.4560.6480.19
200680.4560.6480.19
200550.4560.6480.19
200750.4560.6480.19
200720.4560.6480.19
200910.4560.6480.19
200380.4560.6480.19
200960.4560.6480.19
200460.4560.6480.19
200980.4560.6480.19
200330.4560.6480.19
200280.4560.6480.19
200050.4560.6480.19
200250.4560.6480.19
200420.355-0.1680.19
200410.355-0.1680.19
200270.355-0.1680.19
200850.355-0.1680.19
200290.355-0.1680.19
200130.355-0.1680.19
200620.355-0.1680.19
200470.355-0.1680.19
200140.355-0.1680.19
200640.355-0.1680.19
200190.355-0.1680.19
200120.355-0.1680.19
200970.355-0.1680.19
200600.355-0.1680.19
200450.355-0.1680.19
200860.355-0.1680.19
200900.355-0.1680.19
200840.124-0.967-1.08
200670.124-0.967-1.08
200400.124-0.967-1.08
200310.124-0.967-1.08
200340.124-0.967-1.08
200240.124-0.967-1.08
200030.124-0.967-1.08
200110.124-0.967-1.08
200890.124-0.967-1.08
200870.124-0.967-1.08
200740.124-0.967-1.08
200170.0271.4491.46
200230.0271.4491.46
200360.0271.4491.46
200660.0271.4491.46

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