I have an msp430 synth project and can't decide on the output:
I get an 8 bit ~45kHz PWM output out of the chip which I'd like to use as an audio signal, but I am unsure whether
- I can just stick an impulse amplifier on it and let it in a speaker through a decoupling capacitor
- I should filter off the PWM frequency
So the question is - should I filter off the ~45kHz component of the signal before I let it into any audio output device (amplified speakers, headphones etc.).
I do know for a fact that it'll work either way, I'm just concerned about damaging any additional amplifiers following in the signal path and harming the speakers themselves. So I'd appreciate tips from someone with experience with this.