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I'm excited by the idea of a sizable library of works like this available to the public. However, I noticed some high-pitched squeaking in the 128kbs MP3 and th

I'm excited by the idea of a sizable library of works like this available to the public. However, I noticed some high-pitched squeaking in the 128kbs MP3 and the Soundcloud widget; initially, I thought it was an encoding artifact. After downloading the FLAC version, the chirps are even more pronounced, suggesting they were present at recording, possibly some sort of mechanical sound made from the piano. I find them really distracting, especially at the beginning of track 5, "Variatio 4." It sounds like it's up there in the 10khz-ish range. Anyone have any ideas on what it might be?

Eduard 14y ago
Probably your headphones, your DAC, or your imagination.
- antiterra 14y ago
  Why did you bother with this comment? Did you actually listen for the squeaking yourself? For the record, I did listen with different headphones and DACs before I posted here. As for whether I imagined it or not, frequency analysis on sections where I hear the squeaking shows an isolated peak at around 13.5khz. This peak is absent in sections and tracks where I don't hear the squeaking. I also applied an equalizer to the track, to amplify the squeaking. The chirps become clearly audible when this is done.
deleted 14y ago
[deleted]
sp332 14y ago
I can't hear it with my equipment, but it's definitely visible in the spectrum around 14kHz. http://seanpalmer.smugmug.com/photos/i-4Z4GXQm/0/O/i-4Z4GXQm.png http://seanpalmer.smugmug.com/photos/i-4Z4GXQm/0/O/i-4Z4GXQm... I tried isolating it. http://soundcloud.com/sep332/isolated-artifacts-from-kimiko http://soundcloud.com/sep332/isolated-artifacts-from-kimiko
- antiterra 14y ago
  This was my attempt: http://soundcloud.com/antiterra/variatio4squeaks http://soundcloud.com/antiterra/variatio4squeaks
- robertDouglass 14y ago
  Do you think there's a technique available to remove them without damaging the recording? Feel free to contact me: robert@opengoldbergvariations.org
antiterra 14y ago
From Robert at Open Goldberg Variations: I believe that this was a mechanical problem with the pedal which we unfortunately didn't detect. It's worse on some speakers/headphones than others. Hopefully you'll still be able to enjoy

Eduard 14y ago

Probably your headphones, your DAC, or your imagination.

antiterra 14y ago
Why did you bother with this comment? Did you actually listen for the squeaking yourself? For the record, I did listen with different headphones and DACs before I posted here. As for whether I imagined it or not, frequency analysis on sections where I hear the squeaking shows an isolated peak at around 13.5khz. This peak is absent in sections and tracks where I don't hear the squeaking. I also applied an equalizer to the track, to amplify the squeaking. The chirps become clearly audible when this is done.

deleted 14y ago

[deleted]

sp332 14y ago

I can't hear it with my equipment, but it's definitely visible in the spectrum around 14kHz. http://seanpalmer.smugmug.com/photos/i-4Z4GXQm/0/O/i-4Z4GXQm.png http://seanpalmer.smugmug.com/photos/i-4Z4GXQm/0/O/i-4Z4GXQm... I tried isolating it. http://soundcloud.com/sep332/isolated-artifacts-from-kimiko http://soundcloud.com/sep332/isolated-artifacts-from-kimiko

antiterra 14y ago
This was my attempt: http://soundcloud.com/antiterra/variatio4squeaks http://soundcloud.com/antiterra/variatio4squeaks
robertDouglass 14y ago
Do you think there's a technique available to remove them without damaging the recording? Feel free to contact me: robert@opengoldbergvariations.org

antiterra 14y ago

From Robert at Open Goldberg Variations: I believe that this was a mechanical problem with the pedal which we unfortunately didn't detect. It's worse on some speakers/headphones than others. Hopefully you'll still be able to enjoy