Questions tagged [audio]
Questions about designing electronics for measuring, processing, and amplifying audio signals.
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Why is it ok to use polarized caps to remove DC offset from an audio input?
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?
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Polyphonic sounds from a microcontroller?
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?
Here's the code I'm ...
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Amplifying instruments by measuring current in conductive strings
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 coil.
Another ...
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How does an audio jack detect when a speaker is plugged in?
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 comparator or resistance ...
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sensing light and outputing voltage suitable for audio
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 rotate.
My initial ...
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Program an ATtiny13 as an audio oscillator with variable frequency and pulse-width
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 have been studying the ...
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Maximum sample rate of Arduino Duemilanove?
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 frequency I can achieve ...
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Controlling DC (Pager) Motor with Audio Signal
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 at audio rate (1-...
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Audio Frequency Shift Keying to Arduino
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 with an arduino?
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Audio via Bluetooth
Can i use a Bluetooth USB AVR and send audio over Bluetooth to multiple receivers?
Martin
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DSP recommendation for beginners [closed]
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 never worked with them ...
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