Teensy 3.0 & 3.1 & 3.2 & 3.5 & 3.6

Two new Teensy models are launching now on Kickstarter.

https://www.kickstarter.com/projects/paulstoffregen/teensy-35-and-36

Version 1.0, the first stable release, is now available.

http://www.pjrc.com/teensy/td_libs_Audio.html

Here's Hack-a-Day's coverage.

http://hackaday.com/2014/09/30/the-teensy-audio-library/

I've created a new project for the Audio library.  If you're interested in using Teensy for audio stuff, this is the one to follow.

http://hackaday.io/project/2984-Teensy-Audio-Library

Or if you're willing to give "beta" code a try, it's all on Github.  Several people have already used it for some great projects, despite the it's unofficial release status.

Development on the Arduino support code is continuing, with quite a number of new features added for the upcoming 1.20 release.

http://forum.pjrc.com/threads/26099-Teensyduino-1-20-Release-Candidate-1-Available

If you have a Teensy 3.0 or 3.1 board, I could sure use your feedback and help with testing some of this new stuff.  There's a new DMAChannel object which is intended to make accessing the power DMA hardware easier (but you can still access the hardware registers through it, if you like), and to allow libraries using DMA to dynamically allocate channels to avoid conflicts.

IntervalTimer now supports setting the interrupt priority level, so you can cause your timer interrupt to interrupt almost all other interrupts, or set it to a low priority if you want something to run, but not block more urgent interrupts, or somewhere in between.  The Freescale Kinetis chip supports 16 distinct interrupt priority levels, so you have a lot of flexibility to configure.

The FASTRUN attribute was added, so you can cause any function to be allocated in RAM (with zero wait states).  Normally the flash memory is fine, but if you're using the extreme overclocking (enable by uncommenting lines in boards.txt), adding FASTRUN to the key functions makes them run faster.  How much improvement this really makes is still a good question....

A high quality audio library is currently in development.  At this early stage, it's very "beta", with no documentation other than the examples and conversation on this forum thread.

http://forum.pjrc.com/threads/24793-Audio-Library/...

If you're interested in building projects with awesome audio, it might be worth a look now.  Soon it'll be at a 1.0 release with real documentation.....