Real-Time Implementation of Double Frequency Modulation (DFM) Synthesis*
نویسندگان
چکیده
A method of digital sound synthesis, double frequency modulation (DFM), is defined in terms of two modulating frequencies. Its spectral equation is derived and the harmonic spacing shown to be dependent on the ratio of the two frequencies. The real-time generation of musical sounds by DFM is demonstrated. DFM offers superior control of harmonic envelopes than simple FM, but with less computational load than asymmetrical frequency modulation (AFM).
منابع مشابه
Real-Time Implementation of Asymmetrical Frequency- Modulation Synthesis*
Asymmetrical frequency modulation (AFM) as proposed by Palamin et al. (1988) offers greater flexibility in the shaping of the spectra of synthesized waveforms as compared to normal frequency-modulation (FM) synthesis. The feasibility of using AFM synthesis for the real-time generation of waveforms of musical instruments is demonstrated using a DSP56000 digital signal processor to implement the ...
متن کاملHigh-Performance Robust Three-Axis Finite-Time Attitude Control Approach Incorporating Quaternion Based Estimation Scheme to Overactuated Spacecraft
With a focus on investigations in the area of overactuated spacecraft, a new high-performance robust three-axis finite-time attitude control approach, which is organized in connection with the quaternion based estimation scheme is proposed in the present research with respect to state-of-the-art. The approach proposed here is realized based upon double closed loops to deal with the angular rate...
متن کاملSpace Vector Modulation Based on Classification Method in Three-Phase Multi-Level Voltage Source Inverters
Pulse Width Modulation (PWM) techniques are commonly used to control the output voltage and current of DC to AC converters. Space Vector Modulation (SVM), of all PWM methods, has attracted attention because of its simplicity and desired properties in digital control of Three-Phase inverters. The main drawback of this PWM technique is 
its complex and time-consuming computations in real-time ...
متن کاملSpace Vector Modulation Based on Classification Method in Three-Phase Multi-Level Voltage Source Inverters
Pulse Width Modulation (PWM) techniques are commonly used to control the output voltage and current of DC to AC converters. Space Vector Modulation (SVM), of all PWM methods, has attracted attention because of its simplicity and desired properties in digital control of Three-Phase inverters. The main drawback of this PWM technique is its complex and time-consuming computations in real-time im...
متن کاملAnalog frequency modulation detector for dynamic force microscopy
A new analog frequency modulation ~FM! detector ~demodulator! for dynamic force microscopy ~DFM! is presented. The detector is designed for DFM by utilizing the FM detection method where the resonance frequency shift of the force sensor is kept constant to regulate the distance between a tip and a sample surface. The FM detector employs a phase-locked loop ~PLL! circuit using a voltage-controll...
متن کامل