1. The internet of things: a survey
2. Arduino Realtime Audio Processinghttp://interface.khm.de/index.php/lab/experiments/
3. DSP Processor Fundamentals: Architectures and Features;Lapsley,1996
4. Open Source Hardwarehttp://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.464.3275&rep=rep1&type=pdf
5. A DIY Audio dsp Projecthttp://www.freedsp.cc/