The Raspberry Pi as a personal computer can run literally thousands of applications (apps). The Raspbian Stretch distribution comes with dozens of apps installed; like the Libreoffice Suite for documents, spreadsheets, drawings and presentations. Many more apps can be downloaded and installed from the Web; just look for Linux and particularly Debian compatibility. This activity will will focus on one of the apps I have found to be most useful (besides the Arduino IDE already covered).
- Raspberry Pi Audacity Command Line
- Raspberry Pi Projects
- Raspberry Pi Logo
- Raspberry Pi 3 Audacity
- Raspberry Pi Best Buy
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Audacity will run best with at least 1GB RAM and a 2 GHz processor. Because Audacity was originally written when computers were less powerful, you may be able to run it on much less powerful hardware too. Simple recording is possible on 700 MHz Raspberry Pi, using a USB Microphone.
What is Audacity?
Recording Studio
How would you like to have your own recording studio? Usually just the basic equipment costs thousands of dollars. Sound recording is professionally done using several parallel tracks; each can be adjusted for volume, tone, speed and many other special effects. The reason Audacity made my list of truly useful apps is that it provides many features of a recording/sound editing studio to your computer at no cost.
Audio Accessories
Raspberry Pi Audacity Command Line
Our kit includes the basic accessories needed for using Audacity: speakers and a microphone. Take a moment and make sure they are hooked up to the Raspberry Pi.
Raspberry Pi Projects
On your Raspberry Pi’s desktop open the menu and select the Audacity application.
This is your recording studio control board. Click just below the word ‘Audacity’ to begin monitoring the mic (short for microphone). Speak into the mic and see the green status bar level change with your voice.
Voice Recording
Make a little recording of you voice by clicking on the round red ‘Record’ button and speak in to the mic. Click on the square ‘Stop’ button at the end. Click on the green ‘Play’ button and listen to your voice (the right speaker has a volume control on its back).
Modify Your Voice through Special Effects
In the top toolbar there is an ‘Effect’ menu. Open the Change Speed sub menu and try speeding up and slowing down your voice as shown above. Did you sound like a chipmunk? Try the Echo effect. There are many other effects to explore: have some fun with it!
Do This At Home
If you want to install Audacity on your own Raspberry Pi, open the terminal and type:
Raspberry Pi Logo
sudo apt-get install audacity
Raspberry Pi 3 Audacity
Raspberry Pi Best Buy
amixer cset numid=3 1 [to set audio to 3.5mm jack instead of HDMI]