The soundcard

The soundcard is a key element of my setup. It acts as a translator in real time, much like an interpreter during a UN conference. It translates real-world electric audio signals into numbers that the computer can read and process, and translates the digital output back into plain electric audio signal. The device which translates the electric signal into numbers is called an analog-to-digital converter(ADC). The translation from numbers to an electric signal happens in a digital-to-analog converter (DAC).

The ADC samples the incoming signal : it measures its value at regular intervals (very short) and sends it to the computer. The DAC, unsurprinzingly, works the other way around.

Because an electric audio signal is mostly periodic (more or less a sinusoid, or more generally a sum of sinusoid), the “speed” at which the ADC samples the signal is important.

(Add graphs – from Miller’s?)

(à développer…)

In short, I use a soundcard :

– with a 6.35mm jack “instrument” input,

– with adjustable input and output gain,

– capable of running at a 48Khz samplerate,

– with a 6.35 mm balanced jack output.

This entry was posted in Soundcard and tagged , , , , . Bookmark the permalink.

2 Responses to The soundcard

  1. Ricccy says:

    Hi I am creating a similar project at the moment. I am using phono rather than a jack lead, with phono in and phone out.

    Hot do you set the arduino so it sees the audio from the phono and not from the computer.

    Is this possible maybe to route the audio through the arduino and out of other pins of the arduino?

    Hope you can help!

    Thanks

    • An “standard” Arduino board is not supposed to handle audio signals (at least not withouth an extra board). This blog is about Pd, which runs on computers, not on arduino boards.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s