16 Mar
2013
16 Mar
'13
11:48 p.m.
On Sat, Mar 16, 2013 at 12:48 AM, Ralf Mardorf wrote:
If I play a MP3 with
$ pacman -Q vlc
vlc 2.0.5-4
by jack and the volume is set to 100%, I hear and see clipping in
hdspmixer. It goes up to 0 dBFS at around 90%. FWIW the volume can be
increased up to 200%.
Anybody experiencing the same on (what distro ever)?
Same distribution, same vlc-version, no clipping (checked with jkmeter).
made a test file with a 30 Hz sine, range -1...1, in 16 bit wav format.
generated in pd, recorded with
$ jack_capture --bitdepth 16 --channels 2 --port system:playback_1
--port system:playback_2 30Hz.wav
At 100% volume in vlc, jkmeter shows a peak value of -0.0, just as expected.
Needless to say, but also jaaa/my ears didn't exhibit any indication of
clipping-induced HF content (which clearly shows up at >100%).
During the journey, I found in vlc:
Tools -> Preferences -> Audio -> Replay Gain mode.
That one should probably be set to the default 'none'.
best,
d