Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
wiki:rockchip [2013/06/26 10:36] – [Available flavors] autostatic | wiki:rockchip [2013/06/26 11:40] (current) – [Patching JACK] autostatic | ||
---|---|---|---|
Line 1: | Line 1: | ||
====== Rockchip based devices and real-time, low-latency audio ====== | ====== Rockchip based devices and real-time, low-latency audio ====== | ||
- | Wiki article on using [[http:// | + | Wiki article on using [[http:// |
<note warning> | <note warning> | ||
Line 8: | Line 8: | ||
Currently most Rockchip based devices come in two flavors: | Currently most Rockchip based devices come in two flavors: | ||
- | * The [[http:// | + | * The [[http:// |
- | * The [[http:// | + | * The [[http:// |
+ | |||
+ | | {{ : | ||
+ | |||
+ | | {{ : | ||
- | {{ http:// | ||
- | <align center>// | ||
===== Linux ===== | ===== Linux ===== | ||
- | Rockchip based devices are mostly sold as PC-on-a-stick devices with Android pre-installed. But in order to use these devices as real-time, low-latency audio appliances you will want to install Linux on them. The necessary tools and kernel sources to do so are available and especially the rk3066 | + | Rockchip based devices are mostly sold as PC-on-a-stick devices with Android pre-installed. But in order to use these devices as real-time, low-latency audio appliances you will want to install Linux on them. The necessary tools and kernel sources to do so are available and especially the RK3066 |
+ | |||
+ | [[http:// | ||
+ | |||
+ | ===== Using JACK ===== | ||
+ | |||
+ | JACK (JACK Audio Connection Kit), often referred to as jackd, is a | ||
+ | >//" | ||
+ | \\ | ||
+ | JACK was designed from the ground up for professional audio work, and its design focuses on two key areas: synchronous execution of all clients, and low latency operation."// | ||
+ | |||
+ | ==== Building JACK from source ==== | ||
+ | |||
+ | You will need a recent git checkout of Jack2 or a patched Jack1 for usage on Rockchip based devices otherwise you will encounter the infamous "Bus error" when starting JACK. This is because JACK uses packed structs and the Rockchip RK3066/ | ||
+ | |||
+ | Patches can be found here: https:// | ||
+ | The patches are relatively simple so they can be easily adapted for other JACK versions. | ||
+ | |||
+ | When using Jack2 you might want to disable dbus dependent code in JACK components if you want to run Jack2 on a headless RPi (so without X). You can do this by building Jack2 from source without the '' | ||
+ | |||
+ | ==== Packages ==== | ||
+ | |||
+ | http:// | ||
- | [[http://linux.autostatic.com/ | + | This repository currently only contains patched Jack1 and recent Jack2 packages for Ubuntu 12.04/12.10 and Debian Wheezy that should work on most ARM based platforms. Instructions on how to add the repository are on the site. After having updated your package index files it's just a matter of '' |