On 06/19/2010 01:57 AM, Bearcat M. Şandor wrote:
No it does not add up that way. Maybe alsamixer is showing wrong
numbers?! Fons may know more.
>> If that soundcard really has the dynamic range that the
> The alsamixer volume controls make no difference at all to jkmeter, but adjusting the
Yes it is. Alsamixer controls the volume in the mixer of the sound-card.
JACK is all in software. Consider the following (somewhat simplified)
(eg mplayer, ardour, jkmeter)
Soundcard ## hardware-mixer controlled by alsamixer
Amp & Speakers
When you adjust the volume in mplayer, mplayer itself scales the volume.
mplayer does not interact with the soundcard's hardware-mixer. (Well,
you can configure mplayer to do either or both, but the default with
mplayer/JACK is to use mplayer's integrated "amp".)
jkmeter (or any other JACK app) gets mplayer's audio directly from JACKd
without the audio-data going to the soundcard first.
> I was not sure how to activate K20 or K14 given
You need jkmeter version >= 0.4.0.
Run `jkmeter -type k14` to get the K14 scale (k20 is the default)
`jkmeter -h` prints usage and version information.
Information on the K-system can be found in jkmeter's README and at
>> 2. Set the gain of the soundcard to 0 dB,
Reducing resolution always reduces the quality - some music just needs
to be played loud! :)
As long as you stay in the digital domain, gain changes will not effect
frequency or phase of the sound. But unless you have pro & high-quality
equipment: the analog part (soundcard, amp, speakers) does in practice
respond differently at different gain levels.
Niles Mayer recently elaborated on that:
> Or do software controls not do that at all?
As long as you stay in the digital domain (here: software) it'll be
> Thanks for the help Fons. I appreciate it and your fine software as