Hi all, some of you may already know that Novocaine allows you to read, write and play audio very easily on iOS and OSX. My project called NVDSP allows you to easily filter the raw audio data with for example a lowpass filter. It works with the accelerate framework and is a biquad 2nd order IIR filter (basically means it's pretty awesome).Currently supports peaking EQ (make your own equalizers!), bandpass, lowpass, highpass and notch, and more coming soon. What do you think?