I'm trying to control a DC (pager) motor with a sound signal so that I can use an audio synthesizer to control the speed of the motor. I'm hoping to modulate the speed of the motor …

G'day all! I have an Arduino Duemilanove hanging around spare at the moment and thought I might try a few audio interfacing projects. I'm just wondering what sort of sampling freq …

I am considering a project involving a fair share of digital signal processing. As far as I know, the best type of IC suited for this are the Digital Signal Processors. I have neve …

My motor-scooter has a built in radio, with a small speak either side of the front panel, below the handlebars. It's a JonWay, i.e. cheap Chinese, so I suspect the radio is more s …

I want to create a simple square wave oscillator similar to what one would do with a 555, but I want to use interrupt based pwm support to control pulse width and frequency. I hav …

I am attempting to have an Arduino interpret an AFSK signal, this is very vague but can anyone just point me in the right direction for detecting the frequency of the AFSK signal w …

I've seen circuit diagrams that use a polarize electrolytic to remove DC offsets from an input audio signal. The cap is polarized. Why is this ok?

I can make monophonic sounds by toggling a single pin (at a varying rate) connected to a piezo buzzer. How can I generate two mixed audio signals in software to create polyphony? …

The normal musical instrument pickup uses a magnet inside a coil, and the movement of a ferromagnetic string causes changes in the magnetic field, which then induce currents in the …

Some sound card audio jacks can now inform recent Windows OS's that an audio device is plugged in. Anyone know how it does this? I'm thinking it uses some kind of voltage compara …

I have an idea for a project where I use a pc fan to make an oscillator. The oscillation is created by the cycle of light/dark falling on a light sensor as the blades of the fan ro …

I'm always looking for interesting electronics kits with a music or audio based theme. I've recently started an online shop selling a basic electronics kit, the Posc pocket oscilla …

Can i use a Bluetooth USB AVR and send audio over Bluetooth to multiple receivers?