It supports multi-channel data in interleaved format. It also serves as a base class for 'realtime' streaming subclasses. This class provides output support for various audio file formats. If using MAT-files, data should be saved in an array with each data channel filling a matrix row.īy Perry R. Uncompressed data types are not supported. Signed integer (8-, 16-, and 32-bit) and floating-point (32- and 64-bit) data types are supported.
WvIn currently supports WAV, AIFF, SND (AU), MAT-file (Matlab), and STK RAW file formats. The file size threshold and the increment size values are defined in WvIn.h. Large files are read incrementally from disk. Small files are completely read into local memory during instantiation. For single-channel data, these methods return equivalent values. It is important to distinguish the tick() methods, which return samples produced by averaging across sample frames, from the tickFrame() methods, which return pointers to multi-channel sample frames. WvIn supports multi-channel data in interleaved format. Linear interpolation is used for fractional 'read rates'.
WvIn loads the contents of an audio file for subsequent output. This class provides input support for various audio file formats. Modified algorithm code by Gary Scavone, 2005. Note, however, that this setting may produce aliasing in the signal when the frequency is changing (no automatic modification of the number of harmonics is performed by the setFrequency() function).īased on initial code of Robin Davies, 2005. If nHarmonics is 0, then the signal will contain all harmonics up to half the sample rate. The user can specify both the fundamental frequency of the waveform and the number of harmonics contained in the resulting signal. The integration process has an associated DC offset but that is subtracted off the output signal. This signal is then integrated to achieve a square waveform. The algorithm implemented in this class uses a SincM function with an even M value to achieve a bipolar bandlimited impulse train. It is derived in part from the approach reported by Stilson and Smith in 'Alias-Free Digital Synthesis of Classic Analog Waveforms', 1996.
This class generates a band-limited square wave signal.
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