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ardour {
["type"] = "dsp",
name = "a-Noise",
category = "Utility",
license = "MIT",
author = "Ardour Team",
description = [[Noise Generator]]
}
function dsp_ioconfig ()
return
{
-- -1, -1 = any number of channels as long as input and output count matches
{ audio_in = -1, audio_out = -1},
}
end
function dsp_params ()
return
{
{ ["type"] = "input", name = "Noise Level", min = -80, max = 0, default = -18, unit="dBFS"},
{ ["type"] = "input", name = "Noise Type", min = 0, max = 2, default = 0, enum = true, scalepoints =
{
["White Noise"] = ARDOUR.DSP.NoiseType.UniformWhiteNoise,
["Gaussian White Noise"] = ARDOUR.DSP.NoiseType.GaussianWhiteNoise,
["Pink Noise"] = ARDOUR.DSP.NoiseType.PinkNoise,
}
},
}
end
local cmem = nil
local gen = nil
local noise = 0
function dsp_init (rate)
cmem = ARDOUR.DSP.DspShm (8192)
gen = ARDOUR.DSP.Generator ()
end
function dsp_run (ins, outs, n_samples)
local ctrl = CtrlPorts:array()
local lvl = ARDOUR.DSP.dB_to_coefficient (ctrl[1])
if (noise ~= ctrl[2]) then
noise = ctrl[2]
gen:set_type (noise)
end
for c = 1,#ins do
if ins[c] ~= outs[c] then
ARDOUR.DSP.copy_vector (outs[c], ins[c], n_samples)
end
gen:run (cmem:to_float(0), n_samples)
ARDOUR.DSP.mix_buffers_with_gain (outs[c], cmem:to_float(0), n_samples, lvl)
end
end
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