11 Apr
2009
11 Apr
'09
1:56 p.m.
Hi!
For "lirc-ized" playing back I use mpd CLI client. As far as hdsp driver
hasn't common "Master Volume" (or such) alsa control, I use mpd's
"software"
volume leveling, so lirc commands are directed to CLI mpd client.
To have some reserve in volume I set amplifier's volume regulator higher than,
say, is needed at current moment. As a result I have software level noticeably
below 100%. I suppose such software volume regulating eats samples resolution
(and, at least theoretically, sometimes I have, say, 12-13 bits rather 16).
Am I right?
If "yes" - are there ways to use lirc to set a volume level more directly
communicating with hdsp driver via CLI? Will such way keep sample accuracy?
11 Apr
11 Apr
2:17 p.m.
On Saturday 11 April 2009 19:55:06 Andrew Gaydenko wrote:
Hi!
For "lirc-ized" playing back I use mpd CLI client. As far as hdsp driver
hasn't common "Master Volume" (or such) alsa control, I use mpd's
"software" volume leveling, so lirc commands are directed to CLI mpd
client.
To have some reserve in volume I set amplifier's volume regulator higher
than, say, is needed at current moment. As a result I have software level
noticeably below 100%. I suppose such software volume regulating eats
samples resolution (and, at least theoretically, sometimes I have, say,
12-13 bits rather 16).
Am I right?
If "yes" - are there ways to use lirc to set a volume level more directly
communicating with hdsp driver via CLI? Will such way keep sample accuracy?
Sorry, didn't mention - RME HDSP 9632 is in use.
2:53 p.m.
Andrew,
To have some reserve in volume I set amplifier's
volume regulator higher than,
say, is needed at current moment. As a result I have software level noticeably
below 100%. I suppose such software volume regulating eats samples resolution
(and, at least theoretically, sometimes I have, say, 12-13 bits rather 16).
If you use the hdsp's matrix mixer, it will render the volume with
higher precision than 16 bits, so play back unattenuated and control the
output level in the matrix mixer.
BTW: The levels the HDSP outputs are NOT HIFI levels. Don't connect it
to HIFI equipment unless you're sure what you do.
Flo
--
Machines can do the work, so people have time to think.
public key 6C002249 x-hkp://wwwkeys.eu.pgp.net
3:08 p.m.
On Saturday 11 April 2009 20:53:08 you wrote:
Andrew,
How to deal with the mixer (output channels) via CLI?
To have some reserve in volume I set
amplifier's volume regulator higher
than, say, is needed at current moment. As a result I have software level
noticeably below 100%. I suppose such software volume regulating eats
samples resolution (and, at least theoretically, sometimes I have, say,
12-13 bits rather 16).
If you use the hdsp's matrix mixer, it will render the volume with
higher precision than 16 bits, so play back unattenuated and control the
output level in the matrix mixer. BTW: The levels the HDSP outputs are NOT HIFI levels.
Don't connect it
to HIFI equipment unless you're sure what you do.
[OT] As far as I have designed and soldered the amplifier, I'm sure ;-)
http://gaydenko.com/audio/ab-dynamic/schematics55.png
As well as loudspeakers http://gaydenko.com/audio/speakers/pic/all02.jpg
Andrew
7:10 p.m.
Andrew,
How to deal with the mixer (output channels) via
CLI?
amixer.
Flo
--
Machines can do the work, so people have time to think.
public key 6C002249 x-hkp://wwwkeys.eu.pgp.net
To have some reserve in volume I set amplifier's
volume regulator higher
than, say, is needed at current moment. As a result I have software level
noticeably below 100%. I suppose such software volume regulating eats
samples resolution (and, at least theoretically, sometimes I have, say,
12-13 bits rather 16).
If you use the hdsp's matrix mixer, it will render the
volume with
higher precision than 16 bits, so play back unattenuated and control the
output level in the matrix mixer.
5707
days inactive
5707
days old
linux-audio-user@lists.linuxaudio.org
4 comments
2 participants
participants (2)
-
Andrew Gaydenko -
Florian Faber