PV_BufRd will play back FFT data stored to a buffer with PV_RecordBuf.
PV_RecordBuf stores FFT data to a buffer for use by a number of PV UGens.
The FFT buffer to fill data into
The buffer to read frames of FFT data fram.
A value between 0.0 and 1.0. 0.0 is the beginning of the file, 1.0 the end. Values greater then 1.0 or less then 0.0 are wrapped into this range.