wraggster
January 28th, 2013, 18:41
http://hackadaycom.files.wordpress.com/2013/01/guitar.jpg?w=580&h=295
One of the more interesting use cases for the Raspberry Pi is exploiting its DSP capabilities in interesting ways. There’s a lot of horsepower inside the Raspberry Pi, more than enough to do some very interesting things with audio, all while being powered by a small wall wart adapter. [Pierre] over on the Pure Data mailing list has a proof-of-concept working (http://lists.puredata.info/pipermail/pd-list/2013-01/100546.html) that uses the Raspi as a guitar effects processor. The results (http://www.youtube.com/watch?v=NwJNeouLqgQ&feature=youtu.be) are very encouraging – [Pierre] is able to use his Raspi as a delay, pitch shifter, and of course a classic flanger, phaser, and chorus with a latency of about 16 ms.
There are a few steps necessary to get low latency with the Raspi’s audio interface. [Pierre] is running his Pi headless, and allocated more RAM to the CPU (http://guitarextended.wordpress.com/2012/09/11/setting-up-the-raspberry-pi-for-pd-1-allocate-more-ram-to-cpu/).
If you’d like to try this out for yourself, [Pierre] has a tutorial for setting up Pure Data with the Raspberry Pi (http://guitarextended.wordpress.com/2012/08/10/running-pd-on-a-raspberry-pi/). He’ll be updating his blog soon with more tutorials and verified USB audio interfaces later.
Check out the processor in action after the break.
http://hackaday.com/2013/01/28/raspberry-pi-becomes-a-guitar-effects-processor/
One of the more interesting use cases for the Raspberry Pi is exploiting its DSP capabilities in interesting ways. There’s a lot of horsepower inside the Raspberry Pi, more than enough to do some very interesting things with audio, all while being powered by a small wall wart adapter. [Pierre] over on the Pure Data mailing list has a proof-of-concept working (http://lists.puredata.info/pipermail/pd-list/2013-01/100546.html) that uses the Raspi as a guitar effects processor. The results (http://www.youtube.com/watch?v=NwJNeouLqgQ&feature=youtu.be) are very encouraging – [Pierre] is able to use his Raspi as a delay, pitch shifter, and of course a classic flanger, phaser, and chorus with a latency of about 16 ms.
There are a few steps necessary to get low latency with the Raspi’s audio interface. [Pierre] is running his Pi headless, and allocated more RAM to the CPU (http://guitarextended.wordpress.com/2012/09/11/setting-up-the-raspberry-pi-for-pd-1-allocate-more-ram-to-cpu/).
If you’d like to try this out for yourself, [Pierre] has a tutorial for setting up Pure Data with the Raspberry Pi (http://guitarextended.wordpress.com/2012/08/10/running-pd-on-a-raspberry-pi/). He’ll be updating his blog soon with more tutorials and verified USB audio interfaces later.
Check out the processor in action after the break.
http://hackaday.com/2013/01/28/raspberry-pi-becomes-a-guitar-effects-processor/