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MP3 Options & Oscilloscope Interfacing For Raspberry Pi @Raspberry_Pi #piday #raspberrypi

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Stewart Russell shares some tips for encoding MP3s and interfacing digital oscilloscopes with RPi:

One thing the Raspberry Pi is not good at is encoding MP3s at any great speed. At best (using lame) you might get slightly better than 2× real time playback. If you’re using your Raspberry Pi to transcode to another format, that might be slow enough (with other system overhead) to make the output stutter.

While it would be nice to have the GPU as a general media encoder, we’re not there yet. If you must encode mp3s quickly on a Raspberry Pi, there are a couple of options:

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I have a Rigol DS1102E 100 MHz Digital Oscilloscope. For such a cheap device, it’s remarkable that you can control it using USB Test & Measurement Class commands. I’d been wanting to use a Raspberry Pi as a headless data acquisition box with the oscilloscope for a while, but Raspbian doesn’t ship with the usbtmc kernel module. I thought I was stuck.

Alex Forencich turned up in the forum with an all-Python solution: Python USBTMC (source: alexforencich / python-usbtmc). I got this working quite nicely today on both the Raspberry Pi and my Ubuntu laptop.

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