diff options
| author | Lars Knoll <lars.knoll@qt.io> | 2022-05-30 20:43:48 +0200 |
|---|---|---|
| committer | Lars Knoll <lars.knoll@qt.io> | 2022-05-31 11:31:45 +0200 |
| commit | 22409061c3d54a9b0c1add92ef0a1c826d3aa446 (patch) | |
| tree | 4464cbb7d645b076ae41bebc7f743007b09019c5 /util | |
| parent | 0eede8f08dc06e3c46eb2ffddd765fbc37184187 (diff) | |
Improve volume matching between Surround and Stereo modes
Stereo mode was quite a bit louder that Surround mode when
sent to the same speaker array. This raises the volume of
the surround decoder matrices by a factor of 1.5 which
seems to approximately account for the volume difference
between the modes.
Change-Id: I6eb2db535449e17cf6d7c5e2c63cb60de3f34369
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
Diffstat (limited to 'util')
| -rw-r--r-- | util/adt_generate_qt.m | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/util/adt_generate_qt.m b/util/adt_generate_qt.m index 8bb9497d3..c4b6af956 100644 --- a/util/adt_generate_qt.m +++ b/util/adt_generate_qt.m @@ -183,7 +183,9 @@ function channels = normalizeSN3D(channels) else factor = sqrt(2 * factorial(n - abs(m)) / (factorial(n + abs(m)))); endif - channels(i) *= factor; + % There's an adjustment factor of 1.5 here, to match the volumes generated by the matrices + % here with what we get from a simple stereo decoding. The factor is heuristically determined + channels(i) *= factor*1.5; endfor end |