low pass filter problem

djjarge · Post by **djjarge** » Sat Mar 21, 2015 1:01 pm

No sound after applying low pass filter to my tracks. Win 7 and also on my powerbook g4 os 10.

Worked fine for a couple of projects i did but stopped working suddenly. Using settings rolloff 48 cutoff 80

version 2.0.6 with Bassboost.ny added to plugins

Post by **steve** » Sat Mar 21, 2015 1:10 pm

djjarge wrote:Using settings rolloff 48 cutoff 80

That will pass frequencies below 80 Hz - very low bass only.
Are you sure that you did not mean to apply a high-pass filter with those settings?

djjarge · Post by **djjarge** » Sat Mar 21, 2015 1:41 pm

This is what I was up too:

I added 3 copys of my stereo track to audacity. I changed these 3 to mono leaving 3 mono tracks and applied the following settings

Track 1

low pass filter: rolloff 48 cut off 80

amplify: to the setting showing in the plug in

eq: flatten and apply 2 times

bass boost: frequency 60 boost 2

low pass filter: rolloff 48 cut off 80

Track 2

high pass filter: rolloff 48 cutoff 80

low pass filter: rolloff 48 cut off 100

Track 3

high pass filter: rolloff 48 cut off 100

ampilify: -5

As i said this worked fine on a few projects. Gave me a nice bass bump on track 1 and some control over the mids and highs on tracks 2 and 3.

But now the low pass filter gives me no sound, although the green level indicators are working.

Thanks Steve

Post by **steve** » Sat Mar 21, 2015 1:54 pm

I think you will need to give us some audio samples.
See here for how to do that: http://forum.audacityteam.org/viewtopic ... 49&t=72887

djjarge · Post by **djjarge** » Sat Mar 21, 2015 2:26 pm

here are 2 samples, before and after lowpass filter. you can hear a little sound in media player but nothing in audacity.

I am also adding a copy of my lowpass plugin. I don't if it has become altered in some way. maybe someone can find out for me.

Thanks

Post by **steve** » Sat Mar 21, 2015 3:34 pm

djjarge wrote:I am also adding a copy of my lowpass plugin. I don't if it has become altered in some way. maybe someone can find out for me.

Wow, that's a really old version, but yes that works OK.

djjarge wrote:here are 2 samples, before and after lowpass filter. you can hear a little sound in media player but nothing in audacity.

Works fine here.

What speakers / headphones / sound card are you using?
Do you have "Wow Effect" or any other effects enabled in media player?

djjarge · Post by **djjarge** » Sat Mar 21, 2015 5:23 pm

These tracks were made on another laptop. They need more work , but basically this is how they should be when using the above settings.

track 1 and 2 have no sound in audacity on this computer.

HP/Compaq 8510p
SoundMax Integrated Digital HD Audio

However, using an older version of Audacity ( 2.0) on this computer, the low pass filter works .

Post by **steve** » Sat Mar 21, 2015 5:28 pm

I can't hear tracks 1 and 2 through my laptop speakers because the frequency range is far too low for the built-in speakers, but they both play fine through my headphones or proper sound system.

What speakers / headphones / sound card are you using?
Do you have "Wow Effect" or any other effects enabled in media player?

Post by **DVDdoug** » Sat Mar 21, 2015 5:36 pm

Same here. (I only tried track 1) There is clearly low-frequency sound. I can see the waveform in Audacity and I can hear it on my headphones.

But, my laptop's tiny built-in speakers can't reproduce bass.

P.S.
You've got a dominate frequency that I calculate/estimate at 72Hz (by counting the cycles over a period of time).

djjarge · Post by **djjarge** » Sat Mar 21, 2015 5:46 pm

Hooked the hp into the alto tx15 speakers and, volia, all the sound is there.

Thanks guys

Audacity Forum

low pass filter problem

low pass filter problem

Re: low pass filter problem

Re: low pass filter problem

Re: low pass filter problem

Re: low pass filter problem

Re: low pass filter problem

Re: low pass filter problem

Re: low pass filter problem

Re: low pass filter problem

Re: low pass filter problem