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Special forum features: inserting music notation, posting audio recordings.

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Total Posts: 2 - Pages (1): [1]
user picture Author: rt
Posted: Apr 17 2008 - 06:25 PM
Subject: re:
Well, of course I think the idea of finding music by tapping is great. It is surprising how specific one can actually be that way, and entering a tapped query is not as embarrassing as singing into one's computer microphone. Also, it does not require as much musical talent.

Of course, it does not work for every kind of music, therefore I find it even better if one can also use pitch for narrowing down searches.

About Songtapper in particular: It does not work in my Firefox for Linux (64bit), so I don't know how well it currently performs. If it still uses the technique from the original paper, this would, if I remember correctly, involve editing distances for strings and therefore probably some quantization.

The algorithm which is currently used on Musipedia avoids quantization (it uses the Manhattan norm on sequences of non-quantized onset times - or, to be really specific: almost non-quantized since they still need to be represented with the finitely many bits used for representing floating point numbers). Those onset times are calculated from the MIDI files which result from the Lilypond or abc snippets in the database.

Avoiding quantization can be good for n-tuplets, for example the triplets in Bizet's "Carmen":

I don't have an example for higher n on my mind, but the higher you go, the better it is if you don't have to approximate the onset times by using multiples of, say, 16th notes.
Author: ivionday
Posted: Apr 17 2008 - 05:16 PM
Rainer (and everybody),

What do you think of Song Tapper (
It matches tapped rhythms to a midi database. When I first saw this website I had a pain of "why-didnt-I-do-that-first" since I have always thought music search should have a midi backend. Really I was surprised when I found Musipedia didn't use a midi backend. Or maybe it does, is there something I don't know?
Total Posts: 2 - Pages (1): [1]
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How to insert music:

Add a bit of sheet music, along with a MIDI file, simply by entering note names in Lilypond syntax between the [L] and [/L] tags.
For example, you can try what happens if you enter: [l]g'4 g'4 d''4 d''4 e''4 e''4 d''2[/l] (use the Preview function if you don't actually want to post this).
You can create these lists of note names by clicking on piano keys here.

How to post an audio recording:

If you just want to sing, whistle, or play a melody so that other forum visitors can hear it, follow these steps:

  1. Record your audio here.
  2. You should notice a 32-character hash code, something like: 2a40281c5001c5a7d8c9f57fcdeccfaf
  3. copy this hash code and paste it into a forum post, enclosed in the audio tags, for example: [audio]2a40281c5001c5a7d8c9f57fcdeccfaf[/audio]

How to mark a thread as solved:

If the original question in a thread is solved, please mark it as solved using the "solved" icon (or by just typing [solved] into your post). This makes life easier for people who are willing to identify melodies, since unsolved problems are easier to spot that way. If a problem turns out to not be solved after all, just write [/solved] in a new post, and the thread will be labeled accordingly.