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 <[email protected]>
thesofproject · Nov 10, 2023 · 731476c · 731476c
1 parent 292accc
commit 731476c
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diff --git a/tools/tune/drc/drc_gen_coefs.m b/tools/tune/drc/drc_gen_coefs.m
@@ -29,6 +29,7 @@
 % 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);

diff --git a/tools/tune/drc/example_drc.m b/tools/tune/drc/example_drc.m
@@ -31,6 +31,14 @@ function example_drc()
 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, 'threshold_-25_knee_15_ratio_10_post_3');
+
 rmpath ../common
 
 end