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Wideband Spectrogram (n=64):
Narrowband Spectrogram (n=1024):
"Chives"
Fundemental Frequency:
0.014 *pi rad/sample *8000 samples/sec = 112 Hz
Formants at:
0.078 * 8000 = 624 Hz
0.203 *...
As in real life, lengthening the string lowers the pitch.
giving a scalar for the r parameter creates a 3-point inverting FIR lowpass filter at the bridge:
r=1 makes a 3-point moving-average...
Generating samples from Hidden Markov Models
Results
HMM1
HMM2
HMM3
HMM4
Questions
How can you verify that a transition matrix is valid?
A valid transition matrix has zeros in the first...
Extracting the Trax
The first note lasts from about samples 14 to 54
1st Harmonic: mean(F(2,14:54)) = 203.85
2nd Harmonic: mean(F(3,14:54)) = 409.08
3rdHarmonic: mean(F(4,14:54)) = 615.86
4th...
++Quantizing LPC Filter Coefficients
Quantizing to fewer than 64 levels (6 bits) quickly results in an unintelligible signal. At 64 levels there is still a high-pitched blip during the "ch" of the...
In the spring of '06 I wrote a paper on using Chaos Game Representation to visualize sequences in music as a 2D image. The image makes visible the occurrence of arbitrary-length sequences. The...
Contact Spencer!
moc.liamg|llessur.f.recneps#moc.liamg|llessur.f.recneps
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Possible Topics
Identifing speaker accents
Chaos Game Representation to visualize sequences
Musical Phrase identification
Melody Transcription
Time Signature Identification
Audio Score...
Project Goals
Realtime score follower for computer accompaniment
score is comprised of note events and markup
note events are generated from MIDI score
Robust against performer...
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Welcome to Spencer's Wiki. Right now this is mostly a repository for assignments and information regarding the Speech and Audio Processing course I'm taking from Dan Ellis at Columbia University....
Problem Sets
Assignment 1
Assignment 2
Assignment 3
Assignment 4
Assignment 5
Assignment 6
Assignment 7
Assignment 8
Project
Potential Ideas
Score Following
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