mirror of https://github.com/thesofproject/sof.git
1cbba6c5e8
This patch adds into SOFT/tune/eq a script mls_freq_resp.m that can be used as low budget or quick developer tool to measure device frequency response. The configuration files mls_play_config.txt and mls_rec_config.txt configure the audio devices for local or remote ssh aplay/arecord execution. The MLS measurement with a short time window, e.g. less than 10 ms can partially achieve the same as anechoic measurement. However this is not intended to replace usage any professional audio measurement. If using this use with care! Note also that as such this script measures the response of a speaker - microphone system. One response need to be known and under calibration to get reliable results for other. Even ADC and DAC responses may impact. Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com> |
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| .. | ||
| std_utils | ||
| test_utils | ||
| README | ||
| src_run.sh | ||
| src_test.m | ||
| src_test.sh | ||
| src_test_top.m | ||
README
SOF Audio Processing Components Tests ===================================== This is a set of test scripts to test that performance requirements are met. The tests are currently for measured audio objective quality parameters. The used criteria for performance is only an initial assumption and need to be adjusted for various applications needs. The scripts support currently support the next list of objective quality parameters. The test scripts need Matlab(R) [2] or GNU Octave scientific programming language [3]. - Gain - Frequency Response - THD+N vs. Frequency - Dynamic Range - Attenuation of Alias Products - Attenuation of Image Products Note: The metric is an effort to follow AES17 [1] recommendation for parameters and test procedures. This was created to help developers to quickly check their work but has not been verified to be compliant. Professional equipment and formal calibration process is recommended for professional applications where both accurate absolute and relative metric is needed. Note: The test bench uses by default raw binary data files. It is possible to convert with SoX (v14.4.1) [4] the raw data to e.g. wav format for other audio tools and subjective listening. $ sox -b 32 -c 2 -r 48000 -L -e signed-integer fr_test_out.raw fr_test_out.wav For debugging purposes it is possible to switch from test scripts the test vectors format to txt for easy manual data creation and inspection. Tests for component SRC ----------------------- The top level shell script to launch tests is src_test.sh. See script src_run.sh for assumed install location of SOF host test bench executable and component libraries. Exit code 0 indicates success and exit code 1 indicates failed test cases. The default in/out rates matrix to test is defined in the beginning of script src_test.m. The matrix can be also passed from calling function src_test_top.m if need. The key objective quality parameters requiremements are in the beginning of script src_test.m as well under comment Generic test pass/fail criteria. Test run creates plots into directory "plots". Brief text format reports are placed to directory "reports". References ---------- [1] AES17-1015 standard, http://www.aes.org/publications/standards/search.cfm?docID=21 [2] Matlab(R), https://www.mathworks.com/products/matlab.html [3] GNU Octave, https://www.gnu.org/software/octave/ [4] SoX - Sound eXchange, http://sox.sourceforge.net/