2 Commits

Author	SHA1	Message	Date
Seppo Ingalsuo	684737cf5d	EQ: Improve Matlab compatibility of equalizer filter design plus cleanup ... This patch adds checks into places where Octave and Matlab handle the used functions differently. In previous version the difference in bilinear transform caused IIR designs to fail totally in Matlab. There remains an issue with IIR EQs design with Matlab. In that case a warning text is printed since the problem with tf2sos() does not happen with all designs (example_spk_eq is impacted). It will be investigated and fixed later. The problem does not happen with Octave. Equalizer defaults had accidentally by default boost of one dB compared to desired filter scaling. the offset (norm_offs_db) is now restored to 0. In parametric equalizers design renamed BW to Q for the correct purpose (peaking filter Q-value). Fixed bug in filters normalization where loudness based scaling of IIR filters was using calculated value for the FIR part. Also cleaned up lot commented out lines and simplified some functions parameters usage. Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>	2018-08-09 17:07:55 +03:00
Seppo Ingalsuo	5eb017512e	SOFT: Add equalizer tuning scripts and small examples ... This patch adds support to SOFT to setup FIR and IIR equalizer types. The examples scripts for simple FIR loudness effect, IIR loudness effect and speaker equalization case demonstrate the usage of the tool. The output ".txt" files will be possible to apply with alsactl to setup the equalizers in SOF. Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>	2018-08-07 19:05:38 +03:00