Audacity Forum

There are actually no notches apart from the stop band (for example, 2 would produce a notch at the nyquist frequency). There are definitely notches for values greater than 2. For example, if you filter white noise with a sample rate of 44100 Hz using a value of 5 you will get notches at 8820 Hz an...

I was just wondering why not a low pass or shelf filter rather than N/2 notches at sample-rate/N, 2*sample-rate/N, 3*sample-rate/N.... You've rightly perceived that this is nothing but a lowpass filter. There are actually no notches apart from the stop band (for example, 2 would produce a notch at ...

(defun red (snd mean_over) (snd-avg snd mean_over 1 op-average)) ;; Change the "Nine" to a (odd) integer value of your taste ;; Higher values will also reduce the brightness (multichan-expand 'red s 9) That is quite an unusual filter Robert. I'm not currently at home so I can't hear the p...

The high wind sound seems to be above 8500 Hz. It is a kind of feed back on the microphone. It gets clearer when the track is played at half speed. There are a lot of cures for this case. Since it is apparently only speech, you can easily throw those higher frequencies away. The best way is probably...

It may be necessary to scan the whole effect list. External plug-ins have sometimes "VST" or the manufacturers name in front of it.

If the noise I am getting on recordings is coming from broadband use while recording then I would just disable my network connection while record. This would save me the the hassle no? That's hardly necessary. It is in principle correct that all interference sources should be eliminated during reco...

Thanks all. Advice taken and the filter works great. I learnt something new today. Disconnect the broadband before doing recordings. How do you mean that, What do you want to disconnect? Is the source perhaps an old tape or a LP? It sounds to me a bit like audio before dolby noise reduction or befo...

Do you get noise at the start for WASAPI with real source like stereo mix or line-in? Hard to tell, my sound card has a terrible DC-offset of about -0.2. I can't judge if there's additional noise, apart from the faulty USB voltage. It seems that the actual Audio starts after 3697 samples, as oppose...

A method that always works for broad-band highish noise: (copy the code in the nyquist prompt, under effects) (defun red (snd mean_over) (snd-avg snd mean_over 1 op-average)) ;; Change the "Nine" to a (odd) integer value of your taste ;; Higher values will also reduce the brightness (multi...

Two interesting things I've stumbled upon using 2.0.6 alpha. Wasapi (loopback) seems still to have some problems. With both, Audio Buffer and Latency Correction set to zero, I get the following: - A sample sound (1 s) gets 44100 + 441 samples long. - There are 1395 zero-samples at the beginning Sim...