dspstate~ Report information about current DSP settings dspstate~ can be used for calculations that require the sampling rate of current DSP processing block size. You can also use the leftmost outlet to trigger some event when the audio is turned on or off. dspstate~ outputs state information automatically whenever the audio is turned on or off. You can also get the information by sending a bang. Connecting a signal to the dspstate~ object's inlet reports information about that signal, although currently, all signals have the same sampling rate and vector size. Note that dspstate~ will not output anything if the audio is not turned on in its window.

from the library : MSP Format : External Environment : msp commercial Max 4.x http://www.cycling74.com