Michael Sperone

Hi everyone, I am having trouble with a patch that is giving me some crazy latency.

It is a bandpass filter using cascade, (which "kjg" was so kind as to help me with in this thread ... 

https://cycling74.com/forums/index.php?t=msg&th=30396&start=0&rid=5838&S=cb25f54275459f1ca01126a38d740d42

The filter is pretty much exactly as given to me by "kjg", and it is encapsulated and the display is in its own window in a bpatcher

I tried kjg's patch (which seems perfectly well written) by itself and I'm still getting the delay...

at first it's not bad, it's just about right on

about a minute later there's a little delay, noticable but still I can still live with it

at about 1 more minute later it's like a 50ms delay

about 15 minutes later it's about a 400-500ms delay.

and I've tried all different I/O and Signal vector sizes

if they are too small, it starts off better, but then still continues to delay over time, and it distorts a little after a few minutes as well.

if it's too large, then it starts a little more delayed and gets worse...

I'm on an iMac G5 OSX 10.4.10 1.8GHz PowerPC 1GB DDR SDRAM

and nothing else is running on my computer, including any widgets

It is a bandpass filter using cascade, (which "kjg" was so kind as to help me with in this thread ... https://cycling74.com/forums/index.php?t=msg&th=30396&start=0&rid=5838&S=cb25f54275459f1ca01126a38d740d42 )

The filter is pretty much exactly as given to me by "kjg", and it is encapsulated and the display is in its own window in a bpatcher
I tried kjg's patch (which seems perfectly well written) by itself and I'm still getting the delay... 

at first it's not bad, it's just about right on
about a minute later there's a little delay, noticable but still I can still live with it
at about 1 more minute later it's like a 50ms delay

and I've tried all different I/O and Signal vector sizes
if they are too small, it starts off better, but then still continues to delay over time, and it distorts a little after a few minutes as well.

audio-latency-problems

bizarre, the only thing I could say is to try with Overdrive on and off and see if there's a difference, but I don't know if this matters in this case (unless maybe the "latency" is event-driven, as it might be...).

Don't know enough about the low-level audio-card stuff, but I wonder if the problem is below Max and in the card? or how Max talks to this particular one?

There should be some other good answers to this one. --CJ

Don't know enough about the low-level audio-card stuff, but I wonder if the problem is below Max and in the card? or how Max talks to this particular one? 

There should be some other good answers to this one.  --CJ


> about 15 minutes later it's about a 400-500ms delay.

half a second delay building up sounds weird. I remember the patch and 

even started to play with it, but that wouldn't create accumulating delays.

Just post your version of the patch again, I am sure there is an 

Michael schrieb:
> about 15 minutes later it's about a 400-500ms delay.

half a second delay building up sounds weird. I remember the patch and 
even started to play with it, but that wouldn't create accumulating delays.
Just post your version of the patch again, I am sure there is an 
explanation...

-- 
Stefan Tiedje------------x-------
--_____-----------|--------------
--(_|_ ----|-----|-----()-------
-- _|_)----|-----()--------------
----------()--------www.ccmix.com

I should have mentioned this at first, but I also experienced similar problems a while ago when using a simple patch I wrote with fiddle~ converting frequencies to MIDI.

It is fine every time I turn the audio engine off and on again, but then the same problem happens again.

My audio interface is USB (the Event EZBus). And I've never had any problems with it anywhere else.

I'll post the patch when I get home, and I'll try it with Overdrive On and Off and see if there's a difference.

My audio interface is USB (the Event EZBus).  And I've never had any problems with it anywhere else.

> I should have mentioned this at first, but I also experienced similar

> problems a while ago when using a simple patch I wrote with fiddle~

It seems to be a bug in the world simulator (matrix~) we are all living 

In other words, if latency is accumulating, there must be a memory for 

that delay. If its not in Max, its in the matrix... ;-)

Michael schrieb:
> I should have mentioned this at first, but I also experienced similar
> problems a while ago when using a simple patch I wrote with fiddle~
> converting frequencies to MIDI.

It seems to be a bug in the world simulator (matrix~) we are all living 
in...

In other words, if latency is accumulating, there must be a memory for 
that delay. If its not in Max, its in the matrix... ;-)

I tried turning overdrive off (it was on before) but that didn't help anything

here is the cascade patch that I'm using...

any more ideas? because I don't know what else to do :(

Hi, 
I tried turning overdrive off (it was on before) but that didn't help anything

For me, I could fix the problem by using different sound cards.

The weird thing is, I had no problem with the built in sound card (on a G4 powerbook). Hope this helps.

I've had this exact problem.
For me, I could fix the problem by using different sound cards.
The weird thing is, I had no problem with the built in sound card (on a G4 powerbook). Hope this helps.

davydka, you are a genious! I am using the built-in sound and it works GREAT!!!

Thanks everybody for your help with this!

davydka, you are a genious!  I am using the built-in sound and it works GREAT!!!

Audio Latency Problems