Purpose

Guard limits peaks across all input channels together, fades in from silence after a reset, and replaces non-finite samples with zero. Its meters measure the audio leaving the operator, including any gain reduction.

Use

Place Guard from the Audio view of the Voro menu, under Audio. Connect the final mix to in and out to Device Out. Start with the default Ceiling of -3 dB and Rampinms of 300 ms. Use Mute to silence this output without changing the upstream mix.

Inputs and outputs

• in, required. Mono, stereo or multichannel audio.
• out. Audio with the same channel count as the input.

Controls

• Ceiling sets the peak limit in dB, from -60 to 0.
• Rampinms sets the fade-in duration after initialization or reset, from 1 to 5000 ms.
• Releasems sets how long the limiter takes to recover after a peak, from 5 to 1000 ms.
• Mute silences the output with a short ramp.

Notes

Watch out_peak, out_rms and gr_db to see the output level and gain reduction. Frequent limiting is a reason to lower the upstream mix. The current guard always removes non-finite samples, even though the parameter list still includes Scrubnan.

Ports

Inputs

• in row required
  audio_pcm_f32_mono_v1audio_pcm_f32_stereo_v1audio_pcm_f32_multi_v1

Outputs

• out row
  mirror_input

Parameters

Ceiling (Ceiling) Float op('guard').par.Ceiling

Default:

-3

Range:

-60 to 0

Rampinms (Rampinms) Float op('guard').par.Rampinms

Default:

300

Range:

1 to 5000

Releasems (Releasems) Float op('guard').par.Releasems

Default:

80

Range:

5 to 1000

Mute (Mute) Toggle op('guard').par.Mute

Default:

Off

Options:

Off, On

Scrubnan (Scrubnan) Toggle op('guard').par.Scrubnan

Default:

On

Options:

Off, On