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Tools: Tune: DRC: Add calculation of blob for speaker processing 

This patch adds generation of a blob that applies about
10 dB gain with compression and additional post gain of
3 dB for strong loudness boost effect.

The drc_gen_coefs.m script is changed to display
the master linear gain as decibels to help achieve
suitable gain when setting parameters.

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
This commit is contained in:
Seppo Ingalsuo 2023-11-10 19:03:03 +02:00 committed by Liam Girdwood
parent 18f170352d
commit 3d083e7ca7
2 changed files with 9 additions and 0 deletions
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1
tools/tune/drc/drc_gen_coefs.m
View File

@ -29,6 +29,7 @@ coefs.ratio_base = y0 * (coefs.knee_threshold ^ (-coefs.slope));
% Calculate makeup gain coefficients
full_range_makeup_gain = (1 / coefs.ratio_base) ^ 0.6; % Empirical/perceptual tuning
coefs.master_linear_gain = db2mag(params.post_gain) * full_range_makeup_gain;
coefs.master_linear_gain_db = 20*log10(coefs.master_linear_gain);
% Calculate attack time coefficients
attack_time = max(0.001, params.attack);

8
tools/tune/drc/example_drc.m
View File

@ -31,6 +31,14 @@ drc_coefs_and_config_export(params, 'passthrough');
params.enabled = 1;
drc_coefs_and_config_export(params, 'enabled');
% Export experimental configuration for a small speaker
params.enabled = 1;
params.threshold = -25;
params.knee = 15;
params.ratio = 10;
params.post_gain = 3;
drc_coefs_and_config_export(params, 'generic_notebook_speaker');
rmpath ../common
end