Physical noise model stops audio

Kyma Forum

Tips & Techniques

Post New Topic Post A Reply
profile | register | preferences | faq | search

next newest topic | next oldest topic

Author

Topic: Physical noise model stops audio

LuisAly
Member

posted 31 December 2010 06:20 Edit/Delete Message

physical_noise.kym

I´m creating a simple physical model using white noise as source > HarmonicResonator > SampleCloud > and finally a MIDIvoice which reads a midifile stored on disk. ( how can I upload a midifile for testing? )
The problem is that when reading the midifile the audio suddenly stops creating a kind of "no noise all level meters up!!".
I uploaded the file if someone can take a look and see if I miss something... many thanks

Best regards

Luis Aly

IP: Logged

SSC
Administrator

posted 31 December 2010 08:26 Edit/Delete Message

This sounds as if it might be due to a DC offset. Try putting the noise or the entire input through a HighPassFilter to see whether this helps. Or use the stronger high pass filtering effect of Difference From Self. (A high pass filter will reduce or eliminate DC).

IP: Logged

LuisAly
Member

posted 31 December 2010 11:14 Edit/Delete Message

physical_noise.kym

Hi SSC

Thanks for your answer. I put a HighPassFilter in WhiteNoise out but ... the canceling persists.

Many thanks for your help.

Best regards

Luis Aly

IP: Logged

LuisAly
Member

posted 31 December 2010 13:21 Edit/Delete Message

Hi SSC

Well I tried a piece of code using a PeakDetector (PeakDetector L: 10) * 500 s + 0.1 s in decay field of HarmonicResonator. Better results.
Just to report

Creative reagards

IP: Logged

SSC
Administrator

posted 31 December 2010 14:29 Edit/Delete Message

Luisphysical_noiserearranged.kym

Hi Luis Aly,

I rearranged the order of the modules to put the Stereoizer first and the MIDIVoice at the end, just before the reverb. I noticed that the wavetable 'recording' was getting written more than once (because of the Stereoizer), so I changed the name of the wavetable to {'recording' & ?VoiceNumber} so that each channel would have its own block of memory for granulating. And I added a DifferenceFromSelf just before the input to the HarmonicResonator to ensure that no DC could be coming from the input.

I noticed that the DC overload seemed to occur at high frequencies, so I made the decay on the HarmonicResonator related to the inverse of the !KeyPitch hz. This seems to reduce the likelihood of it overloading with DC. It doesn't eliminate it for all parameter settings, but it seems to reduce the chance of it happening for most settings.

IP: Logged

LuisAly
Member

posted 31 December 2010 20:17 Edit/Delete Message

SSC

What can I say?? Many thanks. Is just like the way I wanted.
One more question. How can I put a MIDI file playing in loop?

Creative regards

Luis Aly

IP: Logged

CharlieNorton
Member

posted 01 January 2011 12:09 Edit/Delete Message

The looping midi-file is something I would be very interested in.

I know you can reference a midi file within a script. I have seen some generative stuff in the library you can feed a midi file.

No idea how to go about it tho.

:-)

Charlie

Perhaps just looping it for an hour in your sequencer and export a really long file might be the quick solution...

Doesn't help if you want to do complex time with different length midi files....

[This message has been edited by CharlieNorton (edited 01 January 2011).]

IP: Logged

LuisAly
Member

posted 11 January 2011 12:19 Edit/Delete Message

Hi SSC

Is just to thanks once again for the help in the patch I developed. I got an "A" in work.
That´s why Kyma is so exciting. Great machine incredible support.

Creative regards

Luis Aly

IP: Logged

All times are CT (US)	next newest topic \| next oldest topic
Administrative Options: Close Topic \| Archive/Move \| Delete Topic

Contact Us | Symbolic Sound Home

This forum is provided solely for the support and edification of the customers of Symbolic Sound Corporation.

Ultimate Bulletin Board 5.45c