ICMC - Day 3

Nocturnes

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“ICMC - Day 3”

11/05/2004

After watching a bit of news, the day began with a coffee and a breakfast crepe (yum). We tried to catch Adrian Moore’s paper, but he went earlier than was published in our schedules - a bummer because I’ve heard so many good things about the system he is working on. My piece on the conference was Dandelions (Alto Saxophone and Jade), which was presented on the 11:00 concert this morning.

Following llunch, was the afternoon paper session (there were actually 2 and a concert, but I chose the paper session on synthesis topics ) Eric Lyon’s paper about spectral tuning was first. A process by which a phase vocoder + a little bit of adjustment of frequencies at the end yields a fantastic result. It basically quantizes (according to a scale, chord, etc.) the pitches before resynthesizing. The grid for quantization can be completely arbitrary, or changing.

This is different than filtering, because the sound input doesn’t need to be in the same range as the filter - all information is shifted to the nearest bin, regardless of the frequency content of the input.

His primary sound examples were:

  A recording of Schoenberg’s Pierro Lunare quantized into D Major
  Mariachi music (changed to major, then changed to an eastern scale like harminic minor with a flat second scale degree for a Klesmer effect)

Eric wrote an external, pvtuner~, for performing the operations. He is hoping to release it in the next release of FFTease. It actually doesn’t resynthesize all of the bins of the analysis (for CPU saving). It uses a threshoid to cutoff softer frequencies and a cutoff parameter for highest frequencies (he usually resynthesizes only the material below 6000Hz).

Just as a reference, he often uses 2048 for the FFT size, as it works well. They are also porting FFTease to Pd, which will include source code.

Matt Wright then did a presentation on filter design. It is still kind of nice to know that something that seems as basic as EQ is still pretty magical in terms of the subtleties of how it works.

Both this morning, this afternoon, as well as yesterday, there have been some truly terrible and dry paper sessions - ugh! This was followed the evening concert, which started with a bang (note: the order of pieces did not at all resemble the order on the program). There were several lively, jazz influenced pieces at the beginning, including a fun/refreshing combo-like performance by Gil Weinberg. It was refreshing and energetic. Mark Applebaum’s playing was particularly spectacular! Following a really nice performance of a piece by Bruce Pennycook, however, the concert seemed to grind to a halt as the music went from energetic to slow and atmospheric. There were several pieces like this, which combined with no intermission for a stretch, led to a largely worn out audience by the end. Fortunately the last piece, Ben Broening’s Nocturnes, was quite nice. Everyone was a little extra tired anyway (at least I was) from being up very late the previous night watching the election coverage.

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