REVERSO

I have a problem with max-msp latest version installed in a PC Flybook of Dialogue (9 inches ultramobile with 1,1Gh and 1GB Ram) running WinXP Pro and with a Realtek AC97 audio card.

The card seems to feedback the audio running in the computer so that if I am doing life voice processing, for example, the output comes back in, through the input producing a feedback. It is not an external microphone feedback. I have run through the settings of Max, the realtek and directX without finding a solution.

I have a problem with max-msp latest version installed in a PC Flybook of Dialogue (9 inches ultramobile with 1,1Gh and 1GB Ram) running WinXP Pro and with a Realtek AC97 audio card. 

The card seems to feedback the audio running in the computer so that if I am doing life voice processing, for example, the output comes back in, through the input producing a feedback. It is not an external microphone feedback. I have run through the settings of Max, the realtek and directX without finding a solution.
Do you know what the problem could be?

realtek-ac97-problem

Sounds like the Realtek driver is sending the audio input 

to the output, which is normal behavior. But in this case,

the audio input and output are the same which of course is what 

causes the feedback. Most audio software gives you the option of 

turning off input monitoring when doing recording. What are you 

Sounds like the Realtek driver is sending the audio input 
to the output, which is normal behavior. But in this case,
the audio input and output are the same which of course is what 
causes the feedback. Most audio software gives you the option of 
turning off input monitoring when doing recording. What are you 
using to record?


I do all voice processing life in Max without recording, except the max buffering. I use the usual built in microphone input, adding an external microphone. I have no problem with the same patches in a different laptop with a sigma tel audio card. The feedback happens even with the microphone off, as soon as I put up the volume of the incoming signal inside max.

You said it's normal that the input goes to the output. If the input is going to the output directly, without undergoing the max processing, wouldn't that be a problem with the max patch? But it works in another latptop.

Or, it seems that the output is going into to the input, even with microphone off? Would that be normal? It doesn't seem to happen in the other laptop with the other card. Even if I play a quicktime or Windows Media video with sound in the computer, the output of the video is going into the microphone input of max, the output of max processing does also, and feedback is produced immediately.

The realtek ac97 has built in audio effects, they are turned off, but it seems to me that they could be generating the problem, if it has a built in feature that brings every output back into the system for the built in audio effects even when turned off?

Thanks for the reply,
I do all voice processing life in Max without recording, except the max buffering. I use the usual built in microphone input, adding an external microphone. I have no problem with the same patches in a different laptop with a sigma tel audio card. The feedback happens even with the microphone off, as soon as I put up the volume of the incoming signal inside max. 

You said it's normal that the input goes to the output.  If the input is going to the output directly, without undergoing the max processing, wouldn't that be a problem with the max patch? But it works in another latptop. 

Actually the feedback happends even with no outputting signals and microphone off: as soon as I put up the volume slider of the incoming signal in Max, which is supposed to bring in only the microphone, or, in this case, other outputting signals from the audio card, the feedback happens as soon as a certain volume level of the incoming signal slider is reached.

also any sounds of the computer, like when doing a wrong ckick with the mouse, are input into max.

I just tried to put the DSP i/o mappings in max so that inputs are all in channel 1 and outputs are in channell 2. Then no feedback happens with max sounds although other computer sounds keep coming into max. Of course I loose the stereo (originally cuadraphonic), there is a lot of noise and the sound is very weak.

i had not adecuately restricted the recording settings of the card to the maicrophone, i thought I had, and doublechecked, but I just found out I had not selected properly, 

so it was quite a simple question in the end.

solved, i think:
i had not adecuately restricted the recording settings of the card to the maicrophone, i thought I had, and doublechecked, but I just found out I had not selected properly, 
so it was quite a simple question in the end.
thanks


Realtek AC97 problem