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Step 4: Working with the speakers

The Pi has a very basic built in pulse width modulation sound output. This means it can’t output high-quality sound the way your laptop computer can, but it can approximate sounds with very quick pulses of varying length. The speakers we used from Adafruit are USB powered, but this power can come from anywhere. If your Pi is out of USB ports at this point, you can either plug in the USB hub or use your laptop’s USB to power the speakers. To play sounds on your Pi you can use command line tools like aplay for .wav files, or omxplayer for far more file formats. The Pi should already have a few sounds on it, type this to play one of them: “omxplayer /usr/share/scratch/Media/Sounds/Effects/WaterDrop.mp3”. If you set up Samba, you can also try copying audio files from your computer to the Pi, and then using omxplayer to play them.
<p>can you answer me please i am in eighth grade and I am making this for language arts. ASAP</p>
<p>how long did this take you</p>
<p>may price more than 10 k INR</p>
<p>What is the total price of this?</p>
<p>i really like the design. very well made! </p>
<p>ain't there a video for it? i wanna see it moving @_@ please :|</p>
Does someone have the message: &quot;Cannot read property 'HITId' of undefined&quot; when executing app.js ?
<p>Have you ever considered turning this into Wheatley from Portal 2? that is my ultimate goal for this.</p>
<p>I did some computer vision on the raspberry pi. For instance face detection and feature tracking. I am working on improving it until it is not using all of the raspi computation power, which is currently the case.</p>
<p>Great project and instructions.</p><p>Im confused on how the noodle actually processes events. What is the response time? Can I make it automated or does it have to have a real person always?</p>
<p>Response time from Mechanical Turk is around 5 minutes, but if you follow this Instructable in general and then substitute your own Turk form that posts directly you a dtabase/service you have set up, then you can get the response time down much lower (maybe 30 seconds).</p><p>Some basic things can be done automatically (like motion detection or basic speech to text) but we were focusing on the manual things.</p>
<p>Am sorry if i skipped but i found no video of your robot. A video would be really nice.</p>
<p>There isn't a video, mainly because the pictures are more representative :) The video would mostly show it playing sounds or putting pictures on the screen, or doing something more digital with the network.</p>
<p>brilliant!</p>
this is amazing! It never ceases to amaze me what people can do with a raspberry pi - you are a genius
<p>Need a video of the robot please!</p>
Oh,so intreseting
<p>Great job!</p>
<p>Amazing. You should enter in a contest. You'll be sure to win something</p>
Love it.

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