Quote Originally Posted by amaze1 View Post
Hello everyone

I know such sound are basically tones with exponentially decaying envelope and wondering if their spectrums can be somewhat emulated with appropriate modulation of frequency and/or duty cycle of a PWM output (say the PIC PWM module) without using an external Programmable Gain Amplifier for the envelope.
Constructing bell-esque sounds using synths normally involves several sine waves and complicated algorithms (eg think Yamaha DX7) ...I'd hazard a guess & say that reading/playing a sample would be the best way to achieve what you want (ie no recourse to external envelope shaping hw)