SAC Update 0.1a

[Bob L]

Anyone test this at odd size buffers yet? How about the 32 sample size?

I'm also curious about the meter problem fix... good... bad?

Bob L

[Steve L]

Don't know if this is what you mean by the meter problem, but...
Older Compaq Presario 3000 w/ P4 2.4G 1 G Ram
M'Audio Profire2626 with ADA8000 running 16 channels
I noticed after about 1 hour the meters on the mic lagged about a second
or so. Stopping the engine and restarting put it back in sync. This could be
the system, though. Oh, 2X64 setting. I may go up to 3X 64 to see if it
changes. .1a

Steve L.
Mountain View Recording
Audio-Video Electronics

[Bob L]

That was on the first release... does it still do that on this new release?

I believe the problem had to do with odd size buffers... that is hopefully fixed in this new release.

Bob L

[Steve L]

This was with .1a. Tried 3X64 and trying 3X128 now. I don't remember this happening when I first tried the program on an Audiophile 2496 on a different
computer or with a FW1814 on the same laptop. I'll keep testing ...
Steve L.
Audio-Video Electronics
Mountain View Recording

[DominicPerry]

Anyone test this at odd size buffers yet? How about the 32 sample size?

I'm also curious about the meter problem fix... good... bad?

Bob L

Yup, this works for me now. I can even use it at 2x32 if I force RealTime Priority. This is on my Internet build with AV etc etc. I'll try it later on the pure music build.
Thanks a million.

Dominic

[AudioAstronomer]

Bob, 0.1a no longer does the strange metering issue I had. The alesis io26 now works properly as well.

To note, I found out the alesis apparently operates at strange buffer sizes despite what it reports :( It adds 32 samples but does not report it to sawstudio. 256 is really 288, 512 is really 544 etc..

[Bob L]

Well... that explains the issues with the Alesis.

Bob L

[sstillwell]

Anyone test this at odd size buffers yet? How about the 32 sample size?

I'm also curious about the meter problem fix... good... bad?

Bob L

Just saw this (no, not a pun...). I'll DL and test @ 32.

Scott

[sstillwell]

Yay, works sweet @ 32. Question: What latency am I actually getting at 3x32 @ 44.1 kHz? I seem to remember that on input or output only ONE of the buffers counts for latency, but on the other ALL buffers count, or some such thing...can you clue us back in on how the math works?

Screen refreshes during sideways scrolling of mixer views is WAY WAY better now. 0.1 it seemed to not redraw until you were done moving...now it seems to work as flawlessly as we've come to expect.

I did see some window-over-window drawing artifacts (blank bits of windows, etc.) but I didn't stop to document what it was...seemed to involve the FX list window, though.

Scott

[sstillwell]

haha...even better. Runs at 1x32 without a sweat.

Love it.

Scott

[Bob L]

Good news... now for the windows redraw issues... make sure you have the Windows drag contents with window option off in the Windows settings... when you grab and drag a window it should outline and then redraw after you let go... if it is dragging the contents you might have all kinds of drawing artifacts.

Bob L

[sstillwell]

Bob,

That option IS set on my computer (or turned off, rather...I don't show window contents while dragging), but I'll keep an eye on it to see if I can reproduce the behavior.

Scott

[mako]

LynxOne works now @ 32x2 with some random (minor) popping. Increasing buffers doesn't clear the popping but going to 64x2 does.

I didn't try the priority thing though - I'll get back to it tomorrow.

Thanks Bob

mako

[Steve L]

On SAC .1b gave up on the laptop for now. Noticed with M'Audio 2496 which is only a 2in/2out card that the screen resolution will corrupt the audio
under certain conditions. Everything will be fine at 2X64 same input applied to 6 channels. No latency of meter draws even after 30 minutes or more.
When you kick in a frequency analyzer the audio glitches terribly at 1024X768
but at 1280X1024 it plays fine. Tried different buffer settings with the same result, so the video resolution being used will affect the audio.
Steve L.
Audio-Video Electronics
Mountain View Recording

[Bob L]

That is an interesting one... are you using the generic Windows video drivers or did you install the video card's drivers. It would seem that something is drastically different as you change resolution and I have seen Windows generic drivers slow way down on different screen resolutions compared to the actual video crad drivers written specifically for the hardware.

Bob L

[Steve L]

This is an onboard / motherboard video on my otherwise internet machine.
I use this computer to test and demo SS for customers. It is only a 2.6 G
Celeron w/ 768 meg RAM. I have SAC running on it with an M'Audio AP2496.
I just noticed this when I put a freqency analyzer on one track of the CD that
I am running in to 6 channels. At 1024X768 glitching at anywhere from 1X64 to 6X128. Change to 1280X1024 and it runs fine. I have a Matrox G550 here
that I think I will stick in this machine to do some more testing on the video.
Back to the laptop...everything runs fine at 2X64 on a Profire 2626 with one ADA8000 except for the meter latency with time. A reset of the engine puts everything normal till it starts drifting out again. This is a P4 w/1 G RAM.
I may set it back up and change the resolution on it to see if it changes the
problem.

Steve L.
Audio-Video Electronics
Mountain VIew Recording

[Bob L]

Steve... did you go up to 0.1b? I included a fix for the meter latency issue... at least I thought so anyway. :)

Bob L

[Steve L]

I tried .1b on the laptop and the meter latency was still there using the
Profire 2626 and 1 ADA8000 and the 1814 with 1 ADA8000. So I think the problem is related to the laptop video and not SAC. If I get time I will try some different video resolutions on this machine. There is a potential customer coming in next week from a venue in Lexington, KY that I want to have this up and running for so I may just build a new P4 or Core Duo to use
to demo SAC. Several churches have expressed interest also. Feedback has all been positive.
Steve L.
Audio-Video Electronics
Mountain View Recording

[andykern]

Steve,
I was having various issues (clicks-droputs and slipping-delay) with my old toshiba satellite laptop (P4 3 Ghz 1GB RAM) and SAC so I put together a new computer. Gigabyte MB GA-P-35-DS3L Intel Core 2 Quad Q6600-2.4ghz
and 2GB DDR2 PC6400 RAM. Using an e-GeForce 7200 GS PCEExpress video card. 2x64 buffers with Fireface800. No glitches/slipping/delay. The only time I had any issues was when I plugged a laptop drive into a USB port. So I don't do that any more. I haven't tried to duplicate the problem. I haven't tried more than a few channels yet. I have been downloading/installing programs with no glitches at all. I'm using the SATA bus. Don't know if that is a factor or not. Andy