MultiTone Generator Multi oscillator function generator for testing, demonstration, effects etc
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MultiTone Generator Description

The Multi Tone Generator (MTG) turns your personal computer into a multi oscillator sound generator for testing or effects, demonstration, education and other purposes. Main features: Constant and swept tones; 4 wave forms:(Sine/square/triangle/white noise); Preset storage; Multi sound card support. White noise: White noise (called as an equivalent to the color white which contains an equal mix of all colours in the spectrum) contains an equal mix of all frequencies, in the real world limited by the bandwidth of the system. White noise is random in nature and does not correlate to itself; in stereo white noise the two channels are totally independent (uncorrelated) of each other. White noise contains equal energy at all frequencies across the system bandwidth, any band x Hz wide contains the same power. This noise is useful for digital dithering (to eliminate audible quantisation distortion), for music synthesis, and general audio effects. Pink noise: This signal is mainly used to test speakers and set equalization. If you use an equalizer and analyser that uses n-th octave bands (typically n=1, 3, 6, 12 or 24), you should use pink noise. Pink noise has a logarithmic characteristic and represents the psycho-acoustic equivalent of white noise filtered to the nature of the human ear (The critical band model). It is also similar to the energy distribution of music, so can be used to test speaker durability (White noise has too much treble and is likely to blow tweeters much more easily than music). The definition of pink noise is that the energy in any n-th octave band is equal across all bands, so the noise appears flat on the n-th octave band analyser. On an analyser with a bandwidth in Hertz (linear) pink noise appears to drop by 3dB per octave. Buffers: Number of internal buffers, normally set to 4. Do not change, unless you have a very fast computer. Decreasing this parameter improves the responsiveness of real-time signal changes during output (e.g. frequency slider), but it also might lead to performance problems. Buffer Size: Size of internal data buffers, normally set to 16384. Do not change unless you have a very fast computer. Decreasing this parameter improves the responsiveness of real-time signal changes during output (e.g. frequency slider), but it also might lead to performance problems. Sampling Frequency: Changes the sampling frequency between 11.025, 22.05, 44.1, 48 and 96 kHz. Generally, the higher the sampling rate the better the sound quality, 44.1 kHz is the sampling rate of CDs. If your sound card supports true 96 kHz sampling frequency, you can generate tones up to 48 kHz. If you have a slow computer and problems with ‘chopped’ signals or the program window freezes, it might be necessary to turn the sampling frequency down to 22 or 11 kHz. NOTE: Some sound cards might appear to work with 96 kHz sampling frequency, but they actually internally only work with 48 kHz and convert to 48 kHz before the Digital-Analogue-Converter. This usually leads to 'aliased' frequency tones below 24 kHz. Constant and swept tones Multiple wave forms (Sine/square/triangle/white noise) Preset storage Multi sound card support. Signals created can be saved as a .WAV file in order to make an audio CD.

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