Subject: [linux-audio-user] Interuptions While Recording
From: linuxmedia4@netscape.net
Date: Fri Feb 07 2003 - 10:37:23 EET
Greetings,
I was having interruptions when recording with ecasound. Someone at
the ecasound list suggested that it was because my Hard Drive was
slow. I upgraded from a 5400 RPM Drive to a 7200 RPM Drive and it
did help. The inturuptions are less often and shorter. They're
usually just an occasional click, and at times can be about a half
a second of silence (while recording).
When I listen to the recording, at the spots where the interuptions
happen, the parts are edited out. In other words, there is __no__
silence (in the file) where the interuptions happen, but it's as if
someone just cut those parts out of the recording and pasted the
remaining file together.
I found several tutorials on hdparm on the internet. I used it to
check my Hard Drive's capabilities and carefully made adjustments
accordingly. Nothing worked. In fact most of the time the -Tt flag
showed that the Timing buffered disk reads went down considerably.
And, of course the interuptions kept happening.
Here is the output of hdparm -Tt /dev/hda:
Timing buffer-cache reads: 128 MB in 0.97 seconds =131.96 MB/sec
Timing buffered disk reads: 64 MB in 1.35 seconds = 47.41 MB/sec
Is this considered slow (when it comes to doing 16 bit 2 channel
44100 Multitrack Recording)?
I did the command "dsmeg" and found the line:
"SiS730 ATA 100 controller"
And the Mother Board Manual says:
"The PCI IDE also supports PIO Mode 3 and 4, UDMA33/66/100 IDE"
Does this means it only capable of 100 MB/sec Data Transfer Rate?
And does this even have much of a bearing on the interuptions I'm
having?
I installed an ATA/133 PCI Adapter Card and did the command
hdparm -Tt /dev/hda and got the following output:
Timing buffer-cache reads: 128 MB in 0.95 seconds =134.74 MB/sec
Timing buffered disk reads: 64 MB in 2.19 seconds = 29.22 MB/sec
I'm not sure why it produced lower numbers. This could be a
configuration problem. But I'm not even sure if the card is
nessesary.
My Software/Hardware:
SuSE 8.1
k7SEM Mother Board
AMD Duron 1Ghz Processor
256 Megs Ram
Soundblaster Live! 5.1
alsa Version 0.9.0.cvs20020903-13
(That's the Alsa that installed with SuSE 8.1 - It
hasn't been altered in any way)
Anyone have a clue how to stop these interuptions?
Any help would be appreciated
Rocco
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This archive was generated by hypermail 2b28 : Fri Feb 07 2003 - 10:38:36 EET