Fourier Analysis
The Fourier analysis window is used to invoke the cvanal soundfile
utility, which performs a single Fourier transform on its input. The resulting
data can be used to perform convolutions via the convolve
opcode.
The following controls are present in the window:
- Sound Input File
- The name of the file containing the sound to be analyzed.
This is a mandatory entry field.
- Analysis Output File
- The name of the generated file containing the resulting data.
This is a mandatory entry field.
- Sample Rate
- If present, indicates the sample rate of the sound input file. If omitted,
the sample rate in the sound file's header is used. For headerless files,
analysis assumes a default sample rate of 10000Hz.
- Channel Number
- Selects one of the channels in the sound input file. Default is channel 1.
- Begin Time
- Offset (in seconds) from the start of the input file to the start of the
segment to be analyzed.
- Duration
- Length (in seconds) of the analyzed segment of the input file. If this
parameter is omitted, analysis proceeds to the end of the file.
- Analyze
- Clicking on this button (when enabled) starts
analysis using the given parameters.
- Abort
- Clicking on this button (when enabled) causes a running analysis to be
aborted.