GitHub - tgc/scape-xcorrsound

Branches Tags

Name		Name	Last commit message	Last commit date
Latest commit History 49 Commits
man		man
sound_index		sound_index
AudioFile.cpp		AudioFile.cpp
AudioFile.h		AudioFile.h
AudioStream.h		AudioStream.h
COPYING		COPYING
FFT.cpp		FFT.cpp
FFT.h		FFT.h
FTNaive.cpp		FTNaive.cpp
FTNaive.h		FTNaive.h
LICENSE		LICENSE
Makefile		Makefile
README		README
build.sh		build.sh
createtarball.sh		createtarball.sh
cross_correlation.h		cross_correlation.h
cross_correlation_test.cpp		cross_correlation_test.cpp
install.sh		install.sh
integrationTests.sh		integrationTests.sh
logstream.cpp		logstream.cpp
logstream.h		logstream.h
migration-qa_0.9		migration-qa_0.9
migrationQA.cpp		migrationQA.cpp
migrationQAfail1Test.sh		migrationQAfail1Test.sh
migrationQAsucces1Test.sh		migrationQAsucces1Test.sh
my_utils.cpp		my_utils.cpp
my_utils.h		my_utils.h
sound_match.cpp		sound_match.cpp
sound_match.h		sound_match.h
testFFT.cpp		testFFT.cpp
test_cross.cpp		test_cross.cpp
xcorrSound.cpp		xcorrSound.cpp

Repository files navigation

!!!WORK IN PROGRESS!!!

This package contains several tools.
 - xcorrSound is a tool to find the overlap between two audio files.
 - soundMatch is a tool to find all occurences of a shorter wav within a larger wav
 - migrationQA is a tool that splits two audio files into equal sized blocks and outputs the correlation for each block (a_i,b_i), if a and b was the input.

The tools all make use of cross correlation, which can be computed through the fourier transform.

Note that all the tools will need access to write to a file called <tool>.log where various information about a run will be stored.

INSTALL

    Run

    ./install.sh

    This will install the fftw3 library.

    Depending on which tool is needed, run
    make <tool>
    where <tool> is either "xcorrSound", "soundMatch" or "migrationQA" (quotes for clarity)


USE

Example: xcorrSound

Syntax:

xcorrSound ANALYSIS_FILE_1.wav ANALYSIS_FILE_2.wav

Output example:

The best match was below the threshold of 0.2
Best at sample number: 11520000
Best at second: 240
Value of match was: 0.132016

In the log various information relating to the wav files can be found,
such as samplerate, number of channels and so on.

----------------------- wav header start -----------------------
ChunkID: RIFF$Ën�WAVE
ChunkSize: 57600036
Format: WAVE
----------------------- wav header end -----------------------
----------------------- wav subchunk start -----------------------
Subchunk1ID: fmt �
Subchunk1Size: 16
AudioFormat: 1
NumChannels: 2
SampleRate: 48000
ByteRate: 192000
BlockAlign: 4
BitsPerSample: 16
Subchunk2ID: data
Subchunk2Size: 57600000
----------------------- wav subchunk end -----------------------
----------------------- wav header start -----------------------
ChunkID: RIFF$Ën�WAVE
ChunkSize: 57600036
Format: WAVE
----------------------- wav header end -----------------------
----------------------- wav subchunk start -----------------------
Subchunk1ID: fmt �
Subchunk1Size: 16
AudioFormat: 1
NumChannels: 2
SampleRate: 48000
ByteRate: 192000
BlockAlign: 4
BitsPerSample: 16
Subchunk2ID: data
Subchunk2Size: 57600000
----------------------- wav subchunk end -----------------------