Hello!

I've been working with pd for some time now, mostly with video and visual tracking, but not that much with sound.
So basically I have this classic guitar and I wanna try to add some PD effects to change the output sound, but here's the thing, there's a big delay (like half a second I guess...is there a way to measure it?) between the time I hit the note and the time PD takes to give me the output, even with no effects at all...
Here's what I have:

It's a simple "Line In --> Line Out", shouldn't this be very close to a real time output?
I tried to change the values on the audio settings delay but it wont make any difference, also tried in both standard and ASIO.
I guess it's some kind of conflict that's lagging PD once I have no microphone lag on regular windows environment - outside PD.
Also I get a fuzz like and some kind odd echo in PD output, but I guess that could be related to the delay...

My cpu:
Windows XP SP2
Pentuim 4 CPU 3.00GHz 1GB RAM
Sound Card is Realtek AC'97
Everything works fine except for what I explained above.

Don't know if anyone can help me with this, but thanks in advance.

Not familiar with the objects/abstractions you are using for input and output.

Do you still have the issue if you go from [adc~] to [dac~] ?

For my experience, I think your problem is using Realtek soundcard. You need a soundcard with near to zero latency like RME (www.rme-audio.com), MOTU, presonus etc.

Delay is produced for soundcard not for Puredata. You need ASIO drivers.

Well, I hope people with more technical knowledge can give their opinions.

@ZombieControl said:

Not familiar with the objects/abstractions you are using for input and output.

Do you still have the issue if you go from [adc~] to [dac~] ?

Yeah I do... same delay and same fuzzy effect.

@pineapple said:

Delay is produced for soundcard not for Puredata.

I assumed that the delay had something to do with my soundcard's communication strictly with PD, once I have no delay with other applications.

@pineapple said:

For my experience, I think your problem is using Realtek soundcard. You need a soundcard with near to zero latency like RME (www.rme-audio.com), MOTU, presonus etc.
Delay is produced for soundcard not for Puredata. You need ASIO drivers.

Ok... a new soundcard is not an option for me at the moment....
I could try and search for some ASIO drivers that could eventually work with my sound card... I've red some stuff about doing it but I'm not sure if that's safe at all, nor if that will make it any better...

Thanks for the fast replies.

Search for ASIO4ALL it's a far better driver (safe, and coexists with your usual driver), and got my realtek soundcard's latency down to 20ms on a 633mhz machine. On your's i'm hoping you'd be able to bring it way lower. You won't get it to professional levels, but acceptable levels, probably.

lots of people have reported low latency using the JACK connection kit. it's the first hit on google when you type in 'JACK'. it's a bit annoying and can be tricky to set up though.