27 Jul
2011
27 Jul
'11
10:42 a.m.
Hi all,
I've managed to install Ubuntustudio 10.10 on my Macbook pro. When I tried
to work on Ardour I got terrible distortion.
So I tried to see where it comes from. Checked the master, OK. Checked the
Sound card (gnome alsa mixer), also good.
I thought I'll try some different settings within Jack, so I set the "Force
16 bit" parameter in Jack, while Ardour is still set to "Sample Format"=32
bit floating point.
Now the distortion is gone but I don't know if it was the right thing to do.
Anyone knows why this helped me? And more than this, did I do the right
thing or have I done something really stupid...
Appreciate your opinions,
Moshe
27 Jul
27 Jul
11:58 a.m.
Hi,
On Wednesday 27 July 2011 12:42:48 Moshe Werner wrote:
I thought I'll try some different settings within
Jack, so I set the "Force
16 bit" parameter in Jack, while Ardour is still set to "Sample
Format"=32
bit floating point.
Now the distortion is gone but I don't know if it was the right thing to
do. Anyone knows why this helped me? And more than this, did I do the
right thing or have I done something really stupid...
Ardour and jack will always communicate their audio via float (that is 32bit
real numbers). As only very few devices implement that, most devices are
talked to in integer-numbers. The newer ones are capable of doing 24bit
integers, some older ones are fixed to 16bit integers. So forcing jack to talk
to the audio-device in 16bit might give you lower quality during playback and
recording but it will not affect the internal quality of the sound processing
done inside jack and ardour and all the apps. And files exported from ardour
will also not be affected by that jack-setting.
Arnold
4:11 p.m.
Thanks for the quick reply!
Do you have any idea why before I configured Jack with force 16 bit I had
distorted sound when playing back audio in ardour?
Now I'm trying to use rosegarden and got the same problem, but now with
MIDI.
I'm a bit lost here.
On Wed, Jul 27, 2011 at 2:58 PM, Arnold Krille <arnold(a)arnoldarts.de> wrote:
Hi,
On Wednesday 27 July 2011 12:42:48 Moshe Werner wrote:
I thought I'll try some different settings
within Jack, so I set the
"Force
16 bit" parameter in Jack, while Ardour is
still set to "Sample
Format"=32
bit floating point.
Now the distortion is gone but I don't know if it was the right thing to
do. Anyone knows why this helped me? And more than this, did I do the
right thing or have I done something really stupid...
Ardour and jack will always communicate their audio via float (that is
32bit
real numbers). As only very few devices implement that, most devices are
talked to in integer-numbers. The newer ones are capable of doing 24bit
integers, some older ones are fixed to 16bit integers. So forcing jack to
talk
to the audio-device in 16bit might give you lower quality during playback
and
recording but it will not affect the internal quality of the sound
processing
done inside jack and ardour and all the apps. And files exported from
ardour
will also not be affected by that jack-setting.
Arnold
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2 comments
2 participants
participants (2)
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Arnold Krille -
Moshe Werner