I appoligize for my lack of savy. Does this answer the
VIA/SiS
question? If so, do you have any other ideas of where I may need
to investigate next?
Your "hdparm -Tt" experiments will not be the same every time you do it,I had
around 1-2 MB/sec in both reads.
But even 30 MB/sec should be far enough to get dropout-free recording.
44100 * 16 * 2 (bit/sec) = 1411200 bit/s
44100*16*2/8 = 176400 byte/s = around 200 kB/sec.
See? Even if you play at the same time (duplex), your 30 MB/sec is far more than that.
One more thing, but be aware, I heard switching the dma-transfer-rate might be dangerous
if you don't have the new 80pin cables. (right?)
you might want to check. "hdparm -i" which gives you some "*" on the
options that are set.
see the "dma1 dma2 dma3 dma4 dma5" line, which (in my case has the "*"
at the dma4=100MB/secautomatically set.)
I once tried with changing that value around, but I believe you need a 80pin cable to set
anything higher than dma2 = 33 MB/sec
see e.g.:
http://www.intel.com/support/graphics/linux/udma.htm.
for the settings you might want to try out.
But in anycase. I don't think it's the bandwidth onto/off your harddrive.
cheers, tobias.
According to the article, I have the _exact_ Ultra ATA/133 PCI Adapter Card _and_ Hard
Drive to acheive the highest speeds. The _Hard Drive's_ specs say:
Buffer size:
8 MB
Average seek time
9.1 MS
DATA Transfer rate:
133 MBytes / sec
(Ultra ATA/133)
Rotational Speed:
7200 RPM
So with the ATA/133 Card, the Hard Drive and (following)
Hardware/Software specs, shouldn't this be enough to allow flawless multitrack
recording:
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)
If you remember, when I installed the card and then did:
"hdparm -Tt /dev/dsp"
the Timing buffered disk reads MB/sec were lower than before I installed it. So, if you
think the card is a worth fooling with, do you have any idea why the Timing buffered disk
reads were lower (and how to bring them up)?
Thanks,
Rocco
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