Sample and hold a signal (multichannel) Use sah~ to capture ("sample") and output ("hold") a value from an input signal whenever a trigger signal satisfies a threshold value according to one of several trigger conditions. The default trigger mode (Ascending) requires the signal to go from being at or below the threshold value to above it. At the moment the trigger condition is satisfied, the input signal is sampled and "held" until the trigger condition is satisfied again, at which point the input is sampled again. Generally this allows one signal to be synchronized to the behavior of another. Cycling '74 MSP Generators Values To Sample, double Sets Trigger Threshold TEXT_HERE Trigger Input TEXT_HERE Output TEXT_HERE Initial trigger value Set trigger threshold value TEXT_HERE Function depends on inlet In left inlet: A signal to be sampled. When the trigger signal (in the right inlet) satisfies the current trigger condition, the signal in the left inlet is sampled and its value is sent out as a constant signal value.

In right inlet: The trigger signal. Output Duration in Samples Normally the signal output of sah~ remains constant. With a non-zero value for duration any new non-zero value will remain constant for a specified number samples, after which it will be 0. Threshold Value Sets the value of the trigger signal used to cause the input signal to be sampled and output. Trigger Mode Determines how sah~ analyzes the trigger signal to cause the input to be sampled and output. The classic (and default) triggermode is 0 (Ascending). Ascending mode detects the trigger signal passing from below to above the threshold value. Useful with increasing ramps (such as phasor~ with a positive frequency). Descending mode detects trigger signal passing from above to below the threshold value. Useful with decreating ramps (such as phasor~ with a negative frequency). Ascending + Descending mode detects trigger signal passing from below to above the threshold value or passing from above to below the threshold value. This mode may produce unexpected results with a phasor but might be more appropriate for a continuous trigger input such as a sine wave. TEXT_HERE Equals mode detects an exact value in the trigger signal value. This mode is not recommended for continuous functions that may never reach a specific value, but could be useful to detect impulses or other signals where a specific value is expected. Zero-to-Nonzero mode detects a trigger signal that goes from a zero value to a non-zero value. This could be useful to detect the start of a ramp or incoming audio. The value of thresh is ignored in this mode. TEXT_HERE Nonzero-to-zero mode detects a trigger signal that goes from a non-zero value to a zero value. This could be useful to detect a signal turning off. The value of thresh is ignored in this mode. Phase mode treats the threshold value as a phase value using the same phase detection algorithm as the what~ object. In Phase mode, sah~ detects resets in the output of the phasor~ object and defines those as triggers for a threshold value of 0. Phase mode works with both positive and negative phasor~ frequencies.