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When enabled, the Mute block “mutes” the input signal so that their is no output (a 0.0 value DC signal). This is useful when powering up or down and when switching program flow. | ![]() |
To Enable/Disable the mute:
Click the check box; the signal is muted when the box is checked.
The mute block is available as a Slew or Non-Slew algorithm.
The Slew version of the algorithm will smoothly transition the gain to its target value, eliminating any click or pops, but require more system resources.
Algorithms:
This block supports both Grow Algorithm (adds additional inputs and outputs) and Add Algorithm (adds an independent mute algorithm plus associated inputs and outputs).
The following assumes you have a working microcontroller platform, with SigmaDSP interface code based on Interfacing SigmaDSP Processors with a Microcontroller.
Within SigmaDSP processors, the Mute function is implemented as a gain. When the checkbox is selected (Mute Enabled), the DSP multiplies the input by 0. This produces a 0 at the output. When the checkbox is unchecked (Mute Disabled), the DSP multiplies the input by 1, allowing the input signal to pass through to the output.
To set the algorithm to Mute, write a 0 to the MuteOnOff address. To unmute the output, write a 1 to the MuteOnOff address.
As usual, adjust the variable name of MOD_MUTE1_ALG0_MUTEONOFF_ADDR
to match your exported files.
Mute values are stored in decimal format (8.24 or 5.23), so use the SIGMA_READ_REGISTER_FLOAT function to get the current value.
double mute_state = SIGMA_READ_REGISTER_FLOAT(MOD_MUTE1_ALG0_MUTEONOFF_ADDR); if (mute_state == 1) { Serial.println("System is Unmuted"); } else if (mute_state == 0) { Serial.println("System is Muted"); } else { Serial.println("Mute value is not 0 or 1"); }
To mute the output:
SIGMA_WRITE_REGISTER_FLOAT(MOD_MUTE1_ALG0_MUTEONOFF_ADDR, 0);
To unmute the output:
SIGMA_WRITE_REGISTER_FLOAT(MOD_MUTE1_ALG0_MUTEONOFF_ADDR, 1);