2008:Query by Tapping

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The main purpose of QBT(Query by Tapping) is to evaluate MIR system in retrieval ground-truth MIDI files by the tapping rhythm. This task provides query rhythm files in WAV formate. Each wav file with a corresponding onset file for participant to evaluate by symbolic form. Evaluation database and query files can be download from (updated on 2008/8/23)

Task description

  • Test database: 103 ground-truth mono MIDI files.
  • WAV Queries: 533 query files to retrieve 103 known target from collection. So far, 1~6 human assessors have listened and tapped a 15 seconds query rhythm from beginning for each target song. WAV files are recorded in 8k-8bit.
  • Onset Queries: 533 onset symbolic query files which drawn from wav files. These onset files can help participant concentrate on similarity matching instead of onset detection. All onset files can't guarantee to have perfect detection result from original wav query files.
  • Evaluation: Return top 10 candidates for each query file. 1 point is scored for a hit in the top 10 and 0 is scored otherwise(Top-10 hit rate).

Data processing proposal for calling formats

Indexing the MIDIs collection

Indexing_exe <var1> <var2>



Running for the query files

Running_exe <var3> <var4> <var5>



Data processing for output answer file formats

The answer file for each run would look like:

0001:0003,0567,0999,<insert X more responses>,XXXX
0002:0103,0567,0998,<insert X more responses>,XXXX
000X:0002,0567,0999,<insert X more responses>,XXXX

Each line represents to each of the queries in a given task run.

Submission closing date

22th August 2008.

Interested Participants

  • Shu-Jen Show Hsiao(show.cs95g at nctu.edu.tw)
  • Rainer Typke: I would be interested if the query data can also be made available in symbolic form so we can see what part of the performance comes from good onset detection from audio, and what comes from a good matching algorithm.
  • Hong-Ru Lee (khair at mirlab dot org)