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>
This patch fixes the command line sample rate parameters passing
into host testbench (-r & -R).
In my computer at least the print command of non-visible plots stopped
working into error so I disabled the print commant that creates PNG
graphics files. It's OK since the purpose of this script is batch testing.
The visible plot files can be enabled from SRC test script to see plots
if need for deep dive.
The patch includes also fix for text output for "help src_test". The
input and output word lengths were missing from sample command.
Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
The audio tests signals contain a start and end marker to extract the
test output to analyze from in-between the markers.
This patch fixes a fail in SRC tests that was caused by incorrect
synchronization to output data. The chirp upper frequency is limited
to 0.99 x Nyquist frequency since the Nyquist frequency in the end
aliased and caused a visible artefact to spectral plot and it triggered
a resampler filter impulse response that had some correlation with
start/end marker chirps. The cosine chirp initialization to start from
90 degrees (zero PCM code instead of max.) also cleaned the start impulse
and improved the look of spectrogram plot.
The syncronization was limited to seek from one measured channel only. The
sync finder also didn't handle properly multi-channel input.
The output file start marker scan length was reduced to be
idle+marker length. And the scan time for end was reduced to be
2xidle+marker length
Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
The topology files naming has been updated to include mclk-N so it
needs to be added here as well for the script src_run.sh to work.
Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
This patch provides scripts to measure such performance as THD+N,
dynamic range, frequency response, gain, etc.
Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
This patch provides tests for sample rate converter (SRC) SOF component.
The tests are executed via the SOF host (x86) version test executable and
the SRC component library.
Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
Seppo Ingalsuo